linux.git
3 years agoMerge branches 'clk-x86', 'clk-stm', 'clk-amlogic' and 'clk-allwinner' into clk-next
Stephen Boyd [Wed, 12 Jan 2022 02:30:35 +0000 (18:30 -0800)]
Merge branches 'clk-x86', 'clk-stm', 'clk-amlogic' and 'clk-allwinner' into clk-next

* clk-x86:
  clk: x86: Fix clk_gate_flags for RV_CLK_GATE
  clk: x86: Use dynamic con_id string during clk registration
  ACPI: APD: Add a fmw property clk-name
  drivers: acpi: acpi_apd: Remove unused device property "is-rv"
  x86: clk: clk-fch: Add support for newer family of AMD's SOC
  clk: Introduce clk-tps68470 driver
  platform/x86: int3472: Deal with probe ordering issues
  platform/x86: int3472: Pass tps68470_regulator_platform_data to the tps68470-regulator MFD-cell
  platform/x86: int3472: Pass tps68470_clk_platform_data to the tps68470-regulator MFD-cell
  platform/x86: int3472: Add get_sensor_adev_and_name() helper
  platform/x86: int3472: Split into 2 drivers
  platform_data: Add linux/platform_data/tps68470.h file
  i2c: acpi: Add i2c_acpi_new_device_by_fwnode() function
  i2c: acpi: Use acpi_dev_ready_for_enumeration() helper
  ACPI: delay enumeration of devices with a _DEP pointing to an INT3472 device

* clk-stm:
  clk: stm32: Fix ltdc's clock turn off by clk_disable_unused() after system enter shell

* clk-amlogic:
  clk: meson: gxbb: Fix the SDM_EN bit for MPLL0 on GXBB

* clk-allwinner:
  clk: sunxi-ng: Add support for the D1 SoC clocks
  clk: sunxi-ng: gate: Add macros for gates with fixed dividers
  clk: sunxi-ng: mux: Add macros using clk_parent_data and clk_hw
  clk: sunxi-ng: mp: Add macros using clk_parent_data and clk_hw
  clk: sunxi-ng: div: Add macros using clk_parent_data and clk_hw
  dt-bindings: clk: Add compatibles for D1 CCUs
  clk: sunxi-ng: Allow the CCU core to be built as a module
  clk: sunxi-ng: Convert early providers to platform drivers
  clk: sunxi-ng: Allow drivers to be built as modules
  clk: sunxi-ng: Export symbols used by CCU drivers

3 years agoMerge branches 'clk-doc', 'clk-renesas', 'clk-at91', 'clk-cleanup' and 'clk-debugfs...
Stephen Boyd [Wed, 12 Jan 2022 02:30:10 +0000 (18:30 -0800)]
Merge branches 'clk-doc', 'clk-renesas', 'clk-at91', 'clk-cleanup' and 'clk-debugfs' into clk-next

* clk-doc:
  clk: Gemini: fix struct name in kernel-doc
  clk: zynq: pll: Fix kernel-doc warnings
  clk: imx: pllv1: fix kernel-doc notation for struct clk_pllv1

* clk-renesas: (31 commits)
  clk: renesas: r9a07g044: Add GPU clock and reset entries
  clk: renesas: r9a07g044: Add mux and divider for G clock
  clk: renesas: r9a07g044: Rename CLK_PLL3_DIV4 macro
  clk: renesas: cpg-mssr: Add support for R-Car S4-8
  clk: renesas: rcar-gen4: Introduce R-Car Gen4 CPG driver
  dt-bindings: clock: Add r8a779f0 CPG Core Clock Definitions
  dt-bindings: power: Add r8a779f0 SYSC power domain definitions
  clk: renesas: r9a07g044: Add TSU clock and reset entry
  mmc: renesas_sdhi: Simplify an expression
  mmc: renesas_sdhi: Use devm_clk_get_optional() to obtain CD clock
  dt-bindings: clock: renesas,cpg-mssr: Document r8a779f0
  clk: renesas: cpg-mssr: propagate return value of_genpd_add_provider_simple()
  clk: renesas: cpg-mssr: Check return value of pm_genpd_init()
  clk: renesas: rzg2l: propagate return value of_genpd_add_provider_simple()
  clk: renesas: rzg2l: Check return value of pm_genpd_init()
  clk: renesas: r9a07g044: Add RSPI clock and reset entries
  clk: renesas: r9a07g044: Change core clock "I" from DEF_FIXED->DEF_DIV
  clk: renesas: rzg2l: Add CPG_PL1_DDIV macro
  mmc: renesas_sdhi: Parse DT for SDnH
  mmc: renesas_sdhi: Use dev_err_probe when getting clock fails
  ...

* clk-at91:
  clk: lan966x: Extend lan966x clock driver for clock gating support
  dt-bindings: clock: lan966x: Extend includes with clock gates
  dt-bindings: clock: lan966x: Extend for clock gate support
  clk: gate: Add devm_clk_hw_register_gate()
  clk: lan966x: Add lan966x SoC clock driver
  dt-bindings: clock: lan966x: Add LAN966X Clock Controller
  dt-bindings: clock: lan966x: Add binding includes for lan966x SoC clock IDs

* clk-cleanup:
  clk: stm32mp1: remove redundant assignment to pointer data
  clk: __clk_core_init() never takes NULL
  clk: clk_core_get() can also return NULL
  clk/ti/adpll: Make const pointer error a static const array

* clk-debugfs:
  clk: Enable/Disable runtime PM for clk_summary
  clk: Emit a stern warning with writable debugfs enabled
  clk: Add write operation for clk_parent debugfs node

3 years agoclk: x86: Fix clk_gate_flags for RV_CLK_GATE
Ajit Kumar Pandey [Sun, 12 Dec 2021 18:05:27 +0000 (23:35 +0530)]
clk: x86: Fix clk_gate_flags for RV_CLK_GATE

In newer SoC we have to clear bit for disabling 48MHz oscillator
clock gate. Remove CLK_GATE_SET_TO_DISABLE flag for proper enable
and disable of 48MHz clock.

Signed-off-by: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
Reviewed-by: Mario Limonciello <Mario.Limonciello@amd.com>
Link: https://lore.kernel.org/r/20211212180527.1641362-6-AjitKumar.Pandey@amd.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
3 years agoclk: x86: Use dynamic con_id string during clk registration
Ajit Kumar Pandey [Sun, 12 Dec 2021 18:05:26 +0000 (23:35 +0530)]
clk: x86: Use dynamic con_id string during clk registration

Replace hard coded con_id string with fch_data->name. We have clk
consumers looking up with different clock names, hence use dynamic
con_id string during clk lookup registration. fch_data->name will
be initialized in acpi driver based on fmw property value.

Signed-off-by: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
Reviewed-by: Mario Limonciello <Mario.Limonciello@amd.com>
Link: https://lore.kernel.org/r/20211212180527.1641362-5-AjitKumar.Pandey@amd.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
3 years agoACPI: APD: Add a fmw property clk-name
Ajit Kumar Pandey [Sun, 12 Dec 2021 18:05:25 +0000 (23:35 +0530)]
ACPI: APD: Add a fmw property clk-name

Add a new device property to fetch clk-name from firmware.

Signed-off-by: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
Reviewed-by: Mario Limonciello <Mario.Limonciello@amd.com>
Link: https://lore.kernel.org/r/20211212180527.1641362-4-AjitKumar.Pandey@amd.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
3 years agodrivers: acpi: acpi_apd: Remove unused device property "is-rv"
Ajit Kumar Pandey [Sun, 12 Dec 2021 18:05:24 +0000 (23:35 +0530)]
drivers: acpi: acpi_apd: Remove unused device property "is-rv"

Initially "is-rv" device property is added for 48MHz fixed clock
support on Raven or RV architecture. It's unused now as we moved
to pci device_id based selection to extend such support on other
architectures. This change removed unused code from acpi driver.

Signed-off-by: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
Reviewed-by: Mario Limonciello <Mario.Limonciello@amd.com>
Link: https://lore.kernel.org/r/20211212180527.1641362-3-AjitKumar.Pandey@amd.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
3 years agox86: clk: clk-fch: Add support for newer family of AMD's SOC
Ajit Kumar Pandey [Sun, 12 Dec 2021 18:05:23 +0000 (23:35 +0530)]
x86: clk: clk-fch: Add support for newer family of AMD's SOC

FCH controller clock configuration slightly differs across AMD's
SOC architectures. Newer family of SOC only support a 48MHz fix
clock while stoney SOC family has a clk_mux to choose 48MHz and
25 MHz clk. At present fixed clk support is only enabled for RV
architecture using "is-rv" device property initialized from boot
loader. This limit 48MHz fixed clock gate support to RV platform
unless we add similar device property in boot loader for other
architectures.

Add pci_device_id table with Stoney platform id and replace "is-rv"
device property check with pci id match to add clk mux support with
25MHz and 48MHz clk support based on clk mux selection. This enable
48Mhz fixed fch clock support by default on all newer SOC's except
stoney. Also replace RV with FIXED as a generic naming conventions
across all platforms and changed module description.

Signed-off-by: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com>
Reviewed-by: Mario Limonciello <Mario.Limonciello@amd.com>
Link: https://lore.kernel.org/r/20211212180527.1641362-2-AjitKumar.Pandey@amd.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
3 years agoclk: Enable/Disable runtime PM for clk_summary
Taniya Das [Mon, 20 Dec 2021 16:43:55 +0000 (22:13 +0530)]
clk: Enable/Disable runtime PM for clk_summary

The registers for some clocks in the SOC area, which are under the power
domain are required to be enabled before accessing them. During the
clk_summary if the power-domains are not enabled they could result into
NoC errors.

Thus ensure the register access of the clock controller is done with
pm_untime_get/put functions.

Signed-off-by: Taniya Das <tdas@codeaurora.org>
Link: https://lore.kernel.org/r/1640018638-19436-3-git-send-email-tdas@codeaurora.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
3 years agoMerge tag 'renesas-clk-for-v5.17-tag2' of git://git.kernel.org/pub/scm/linux/kernel...
Stephen Boyd [Wed, 29 Dec 2021 05:42:12 +0000 (21:42 -0800)]
Merge tag 'renesas-clk-for-v5.17-tag2' of git://git./linux/kernel/git/geert/renesas-drivers into clk-renesas

Pull Renesas clk driver updates from Geert Uytterhoeven:

 - Add support for the new Renesas R-Car S4-8 (R8A779F0) SoC
 - Add GPU clock and resets on Renesas RZ/G2L
 - Miscellaneous fixes and improvements

* tag 'renesas-clk-for-v5.17-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers:
  clk: renesas: r9a07g044: Add GPU clock and reset entries
  clk: renesas: r9a07g044: Add mux and divider for G clock
  clk: renesas: r9a07g044: Rename CLK_PLL3_DIV4 macro
  clk: renesas: cpg-mssr: Add support for R-Car S4-8
  clk: renesas: rcar-gen4: Introduce R-Car Gen4 CPG driver
  dt-bindings: clock: Add r8a779f0 CPG Core Clock Definitions
  dt-bindings: power: Add r8a779f0 SYSC power domain definitions

3 years agoMerge tag 'sunxi-clk-for-5.17-1' of https://git.kernel.org/pub/scm/linux/kernel/git...
Stephen Boyd [Wed, 29 Dec 2021 05:37:42 +0000 (21:37 -0800)]
Merge tag 'sunxi-clk-for-5.17-1' of https://git./linux/kernel/git/sunxi/linux into clk-allwinner

Pull Allwinner clk driver updates from Maxime Ripard:

Our usual PR for the Allwinner SoCs, this time enabling our
sub-framework to be built as a module, converting most drivers to
platform drivers and allow them to be built as modules, and support for
the Allwinner D1

* tag 'sunxi-clk-for-5.17-1' of https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux:
  clk: sunxi-ng: Add support for the D1 SoC clocks
  clk: sunxi-ng: gate: Add macros for gates with fixed dividers
  clk: sunxi-ng: mux: Add macros using clk_parent_data and clk_hw
  clk: sunxi-ng: mp: Add macros using clk_parent_data and clk_hw
  clk: sunxi-ng: div: Add macros using clk_parent_data and clk_hw
  dt-bindings: clk: Add compatibles for D1 CCUs
  clk: sunxi-ng: Allow the CCU core to be built as a module
  clk: sunxi-ng: Convert early providers to platform drivers
  clk: sunxi-ng: Allow drivers to be built as modules
  clk: sunxi-ng: Export symbols used by CCU drivers

3 years agoMerge tag 'clk-meson-v5.17-1' of https://github.com/BayLibre/clk-meson into clk-amlogic
Stephen Boyd [Wed, 29 Dec 2021 05:36:40 +0000 (21:36 -0800)]
Merge tag 'clk-meson-v5.17-1' of https://github.com/BayLibre/clk-meson into clk-amlogic

Pull an Amlogic clock driver update from Jerome Brunet:

 - Fix MPLL0 gxbb SDM enable

* tag 'clk-meson-v5.17-1' of https://github.com/BayLibre/clk-meson:
  clk: meson: gxbb: Fix the SDM_EN bit for MPLL0 on GXBB

3 years agoclk: stm32mp1: remove redundant assignment to pointer data
Colin Ian King [Fri, 26 Nov 2021 22:12:39 +0000 (22:12 +0000)]
clk: stm32mp1: remove redundant assignment to pointer data

The pointer data is being initialized with a value and a few lines
later on being re-assigned the same value, so this re-assignment is
redundant. Clean up the code and remove it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20211126221239.1100960-1-colin.i.king@gmail.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
3 years agoclk: stm32: Fix ltdc's clock turn off by clk_disable_unused() after system enter...
Dillon Min [Tue, 26 Oct 2021 07:11:21 +0000 (15:11 +0800)]
clk: stm32: Fix ltdc's clock turn off by clk_disable_unused() after system enter shell

stm32's clk driver register two ltdc gate clk to clk core by
clk_hw_register_gate() and clk_hw_register_composite()

first: 'stm32f429_gates[]', clk name is 'ltdc', which no user to use.
second: 'stm32f429_aux_clk[]', clk name is 'lcd-tft', used by ltdc driver

both of them point to the same offset of stm32's RCC register. after
kernel enter console, clk core turn off ltdc's clk as 'stm32f429_gates[]'
is no one to use. but, actually 'stm32f429_aux_clk[]' is in use.

stm32f469/746/769 have the same issue, fix it.

Fixes: daf2d117cbca ("clk: stm32f4: Add lcd-tft clock")
Link: https://lore.kernel.org/linux-arm-kernel/1590564453-24499-7-git-send-email-dillon.minfei@gmail.com/
Link: https://lore.kernel.org/lkml/CAPTRvHkf0cK_4ZidM17rPo99gWDmxgqFt4CDUjqFFwkOeQeFDg@mail.gmail.com/
Signed-off-by: Dillon Min <dillon.minfei@gmail.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Acked-by: Gabriel Fernandez <gabriel.fernandez@foss.st.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/1635232282-3992-10-git-send-email-dillon.minfei@gmail.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
3 years agoclk: Introduce clk-tps68470 driver
Hans de Goede [Fri, 3 Dec 2021 10:28:49 +0000 (11:28 +0100)]
clk: Introduce clk-tps68470 driver

The TPS68470 PMIC provides Clocks, GPIOs and Regulators. At present in
the kernel the Regulators and Clocks are controlled by an OpRegion
driver designed to work with power control methods defined in ACPI, but
some platforms lack those methods, meaning drivers need to be able to
consume the resources of these chips through the usual frameworks.

This commit adds a driver for the clocks provided by the tps68470,
and is designed to bind to the platform_device registered by the
intel_skl_int3472 module.

This is based on this out of tree driver written by Intel:
https://github.com/intel/linux-intel-lts/blob/4.14/base/drivers/clk/clk-tps68470.c
with various cleanups added.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211203102857.44539-7-hdegoede@redhat.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
3 years agoMerge tag 'platform-drivers-x86-int3472-1' of git://git.kernel.org/pub/scm/linux...
Stephen Boyd [Thu, 16 Dec 2021 04:11:38 +0000 (20:11 -0800)]
Merge tag 'platform-drivers-x86-int3472-1' of git://git./linux/kernel/git/pdx86/platform-drivers-x86 into clk-x86

Signed tag for the immutable platform-drivers-x86-int3472 branch

This branch contains 5.16-rc1 + the pending ACPI/i2c, tps68570 platform_data
and INT3472 driver patches.

* tag 'platform-drivers-x86-int3472-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86:
  platform/x86: int3472: Deal with probe ordering issues
  platform/x86: int3472: Pass tps68470_regulator_platform_data to the tps68470-regulator MFD-cell
  platform/x86: int3472: Pass tps68470_clk_platform_data to the tps68470-regulator MFD-cell
  platform/x86: int3472: Add get_sensor_adev_and_name() helper
  platform/x86: int3472: Split into 2 drivers
  platform_data: Add linux/platform_data/tps68470.h file
  i2c: acpi: Add i2c_acpi_new_device_by_fwnode() function
  i2c: acpi: Use acpi_dev_ready_for_enumeration() helper
  ACPI: delay enumeration of devices with a _DEP pointing to an INT3472 device

3 years agoplatform/x86: int3472: Deal with probe ordering issues
Hans de Goede [Fri, 3 Dec 2021 10:28:54 +0000 (11:28 +0100)]
platform/x86: int3472: Deal with probe ordering issues

The clk and regulator frameworks expect clk/regulator consumer-devices
to have info about the consumed clks/regulators described in the device's
fw_node.

To work around this info missing from the ACPI tables on devices where
the int3472 driver is used, the int3472 MFD-cell drivers attach info about
consumers to the clks/regulators when registering these.

This causes problems with the probe ordering wrt drivers for consumers
of these clks/regulators. Since the lookups are only registered when the
provider-driver binds, trying to get these clks/regulators before then
results in a -ENOENT error for clks and a dummy regulator for regulators.

All the sensor ACPI fw-nodes have a _DEP dependency on the INT3472 ACPI
fw-node, so to work around these probe ordering issues the ACPI core /
i2c-code does not instantiate the I2C-clients for any ACPI devices
which have a _DEP dependency on an INT3472 ACPI device until all
_DEP-s are met.

This relies on acpi_dev_clear_dependencies() getting called by the driver
for the _DEP-s when they are ready, add a acpi_dev_clear_dependencies()
call to the discrete.c probe code.

In the tps68470 case calling acpi_dev_clear_dependencies() is already done
by the acpi_gpiochip_add() call done by the driver for the GPIO MFD cell
(The GPIO cell is deliberately the last cell created to make sure the
clk + regulator cells are already instantiated when this happens).

However for proper probe ordering, the clk/regulator cells must not just
be instantiated the must be fully ready (the clks + regulators must be
registered with their subsystems).

Add MODULE_SOFTDEP dependencies for the clk and regulator drivers for
the instantiated MFD-cells so that these are loaded before us and so
that they bind immediately when the platform-devs are instantiated.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211203102857.44539-12-hdegoede@redhat.com
3 years agoplatform/x86: int3472: Pass tps68470_regulator_platform_data to the tps68470-regulato...
Hans de Goede [Fri, 3 Dec 2021 10:28:53 +0000 (11:28 +0100)]
platform/x86: int3472: Pass tps68470_regulator_platform_data to the tps68470-regulator MFD-cell

Pass tps68470_regulator_platform_data to the tps68470-regulator
MFD-cell, specifying the voltages of the various regulators and
tying the regulators to the sensor supplies so that sensors which use
the TPS68470 can find their regulators.

Since the voltages and supply connections are board-specific, this
introduces a DMI matches int3472_tps68470_board_data struct which
contains the necessary per-board info.

This per-board info also includes GPIO lookup information for the
sensor IO lines which may be connected to the tps68470 GPIOs.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211203102857.44539-11-hdegoede@redhat.com
3 years agoplatform/x86: int3472: Pass tps68470_clk_platform_data to the tps68470-regulator...
Hans de Goede [Fri, 3 Dec 2021 10:28:52 +0000 (11:28 +0100)]
platform/x86: int3472: Pass tps68470_clk_platform_data to the tps68470-regulator MFD-cell

Pass tps68470_clk_platform_data to the tps68470-clk MFD-cell,
so that sensors which use the TPS68470 can find their clock.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211203102857.44539-10-hdegoede@redhat.com
3 years agoplatform/x86: int3472: Add get_sensor_adev_and_name() helper
Hans de Goede [Fri, 3 Dec 2021 10:28:51 +0000 (11:28 +0100)]
platform/x86: int3472: Add get_sensor_adev_and_name() helper

The discrete.c code is not the only code which needs to lookup the
acpi_device and device-name for the sensor for which the INT3472
ACPI-device is a GPIO/clk/regulator provider.

The tps68470.c code also needs this functionality, so factor this
out into a new get_sensor_adev_and_name() helper.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211203102857.44539-9-hdegoede@redhat.com
3 years agoplatform/x86: int3472: Split into 2 drivers
Hans de Goede [Fri, 3 Dec 2021 10:28:50 +0000 (11:28 +0100)]
platform/x86: int3472: Split into 2 drivers

The intel_skl_int3472.ko module contains 2 separate drivers,
the int3472_discrete platform driver and the int3472_tps68470
I2C-driver.

These 2 drivers contain very little shared code, only
skl_int3472_get_acpi_buffer() and skl_int3472_fill_cldb() are
shared.

Split the module into 2 drivers, linking the little shared code
directly into both.

This will allow us to add soft-module dependencies for the
tps68470 clk, gpio and regulator drivers to the new
intel_skl_int3472_tps68470.ko to help with probe ordering issues
without causing these modules to get loaded on boards which only
use the int3472_discrete platform driver.

While at it also rename the .c and .h files to remove the
cumbersome intel_skl_int3472_ prefix.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211203102857.44539-8-hdegoede@redhat.com
3 years agoplatform_data: Add linux/platform_data/tps68470.h file
Hans de Goede [Fri, 3 Dec 2021 10:28:47 +0000 (11:28 +0100)]
platform_data: Add linux/platform_data/tps68470.h file

The clk and regulator frameworks expect clk/regulator consumer-devices
to have info about the consumed clks/regulators described in the device's
fw_node.

To work around cases where this info is not present in the firmware tables,
which is often the case on x86/ACPI devices, both frameworks allow the
provider-driver to attach info about consumers to the provider-device
during probe/registration of the provider device.

The TI TPS68470 PMIC is used x86/ACPI devices with the consumer-info
missing from the ACPI tables. Thus the tps68470-clk and tps68470-regulator
drivers must provide the consumer-info at probe time.

Define tps68470_clk_platform_data and tps68470_regulator_platform_data
structs to allow the x86 platform code to pass the necessary consumer info
to these drivers.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211203102857.44539-5-hdegoede@redhat.com
3 years agoi2c: acpi: Add i2c_acpi_new_device_by_fwnode() function
Hans de Goede [Fri, 3 Dec 2021 10:28:46 +0000 (11:28 +0100)]
i2c: acpi: Add i2c_acpi_new_device_by_fwnode() function

Change i2c_acpi_new_device() into i2c_acpi_new_device_by_fwnode() and
add a static inline wrapper providing the old i2c_acpi_new_device()
behavior.

This is necessary because in some cases we may only have access
to the fwnode / acpi_device and not to the matching physical-node
struct device *.

Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211203102857.44539-4-hdegoede@redhat.com
3 years agoi2c: acpi: Use acpi_dev_ready_for_enumeration() helper
Hans de Goede [Fri, 3 Dec 2021 10:28:45 +0000 (11:28 +0100)]
i2c: acpi: Use acpi_dev_ready_for_enumeration() helper

The clk and regulator frameworks expect clk/regulator consumer-devices
to have info about the consumed clks/regulators described in the device's
fw_node.

To work around cases where this info is not present in the firmware tables,
which is often the case on x86/ACPI devices, both frameworks allow the
provider-driver to attach info about consumers to the clks/regulators
when registering these.

This causes problems with the probe ordering wrt drivers for consumers
of these clks/regulators. Since the lookups are only registered when the
provider-driver binds, trying to get these clks/regulators before then
results in a -ENOENT error for clks and a dummy regulator for regulators.

To ensure the correct probe-ordering the ACPI core has code to defer the
enumeration of consumers affected by this until the providers are ready.

Call the new acpi_dev_ready_for_enumeration() helper to avoid
enumerating / instantiating i2c-clients too early.

Acked-by: Wolfram Sang <wsa@kernel.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211203102857.44539-3-hdegoede@redhat.com
3 years agoACPI: delay enumeration of devices with a _DEP pointing to an INT3472 device
Hans de Goede [Fri, 3 Dec 2021 10:28:44 +0000 (11:28 +0100)]
ACPI: delay enumeration of devices with a _DEP pointing to an INT3472 device

The clk and regulator frameworks expect clk/regulator consumer-devices
to have info about the consumed clks/regulators described in the device's
fw_node.

To work around cases where this info is not present in the firmware tables,
which is often the case on x86/ACPI devices, both frameworks allow the
provider-driver to attach info about consumers to the clks/regulators
when registering these.

This causes problems with the probe ordering wrt drivers for consumers
of these clks/regulators. Since the lookups are only registered when the
provider-driver binds, trying to get these clks/regulators before then
results in a -ENOENT error for clks and a dummy regulator for regulators.

One case where we hit this issue is camera sensors such as e.g. the OV8865
sensor found on the Microsoft Surface Go. The sensor uses clks, regulators
and GPIOs provided by a TPS68470 PMIC which is described in an INT3472
ACPI device. There is special platform code handling this and setting
platform_data with the necessary consumer info on the MFD cells
instantiated for the PMIC under: drivers/platform/x86/intel/int3472.

For this to work properly the ov8865 driver must not bind to the I2C-client
for the OV8865 sensor until after the TPS68470 PMIC gpio, regulator and
clk MFD cells have all been fully setup.

The OV8865 on the Microsoft Surface Go is just one example, all X86
devices using the Intel IPU3 camera block found on recent Intel SoCs
have similar issues where there is an INT3472 HID ACPI-device, which
describes the clks and regulators, and the driver for this INT3472 device
must be fully initialized before the sensor driver (any sensor driver)
binds for things to work properly.

On these devices the ACPI nodes describing the sensors all have a _DEP
dependency on the matching INT3472 ACPI device (there is one per sensor).

This allows solving the probe-ordering problem by delaying the enumeration
(instantiation of the I2C-client in the ov8865 example) of ACPI-devices
which have a _DEP dependency on an INT3472 device.

The new acpi_dev_ready_for_enumeration() helper used for this is also
exported because for devices, which have the enumeration_by_parent flag
set, the parent-driver will do its own scan of child ACPI devices and
it will try to enumerate those during its probe(). Code doing this such
as e.g. the i2c-core-acpi.c code must call this new helper to ensure
that it too delays the enumeration until all the _DEP dependencies are
met on devices which have the new honor_deps flag set.

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211203102857.44539-2-hdegoede@redhat.com
3 years agoclk: Emit a stern warning with writable debugfs enabled
Stephen Boyd [Fri, 10 Dec 2021 01:34:05 +0000 (17:34 -0800)]
clk: Emit a stern warning with writable debugfs enabled

We don't want vendors to be enabling this part of the clk code and
shipping it to customers. Exposing the ability to change clk frequencies
and parents via debugfs is potentially damaging to the system if folks
don't know what they're doing. Emit a strong warning so that the message
is clear: don't enable this outside of development systems.

Fixes: 37215da5553e ("clk: Add support for setting clk_rate via debugfs")
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20211210014237.2130300-1-sboyd@kernel.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
3 years agoclk: Add write operation for clk_parent debugfs node
Sam Protsenko [Wed, 13 Oct 2021 17:20:42 +0000 (20:20 +0300)]
clk: Add write operation for clk_parent debugfs node

Useful for testing mux clocks. One can write the index of the parent to
be set into clk_parent node, starting from 0. Example

    # cd /sys/kernel/debug/clk/mout_peri_bus
    # cat clk_possible_parents
      dout_shared0_div4 dout_shared1_div4
    # cat clk_parent
      dout_shared0_div4
    # echo 1 > clk_parent
    # cat clk_parent
      dout_shared1_div4

CLOCK_ALLOW_WRITE_DEBUGFS has to be defined in drivers/clk/clk.c in
order to use this feature.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Acked-by: Michael Turquette <mturquette@baylibre.com>
Link: https://lore.kernel.org/r/20211013172042.10884-1-semen.protsenko@linaro.org
[sboyd@kernel.org: Collapse ifdefs]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
3 years agoclk: __clk_core_init() never takes NULL
Stephen Boyd [Wed, 8 Dec 2021 04:15:34 +0000 (20:15 -0800)]
clk: __clk_core_init() never takes NULL

The only caller of __clk_core_init() allocates the pointer and checks
the allocation for NULL so this check is impossible. Remove it.

Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20211208041534.3928718-2-sboyd@kernel.org
3 years agoclk: clk_core_get() can also return NULL
Stephen Boyd [Wed, 8 Dec 2021 04:15:33 +0000 (20:15 -0800)]
clk: clk_core_get() can also return NULL

Nothing stops a clk controller from registering an OF clk provider
before registering those clks with the clk framework. This is not great
but we deal with it in the clk framework by refusing to hand out struct
clk pointers when 'hw->core' is NULL, the indication that clk_register()
has been called.

Within clk_core_fill_parent_index() we considered this case when a
clk_hw pointer is referenced directly by filling in the parent cache
with an -EPROBE_DEFER pointer when the core pointer is NULL. When we
lookup a parent with clk_core_get() we don't care about the return value
being NULL though, because that was considered largely impossible, but
it's been proven now that it can be NULL if two clk providers are
probing in parallel and the parent provider has been registered before
the clk has. Let's check for NULL here as well and treat it the same as
direct clk_hw references.

Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20211208041534.3928718-1-sboyd@kernel.org
3 years agoclk/ti/adpll: Make const pointer error a static const array
Colin Ian King [Sat, 27 Nov 2021 17:30:36 +0000 (17:30 +0000)]
clk/ti/adpll: Make const pointer error a static const array

Make const pointer error a static const array, removes a dereference
and shrinks object code a little.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20211127173036.150535-1-colin.i.king@gmail.com
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
3 years agoMerge tag 'clk-at91-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/at91/linux...
Stephen Boyd [Thu, 9 Dec 2021 08:28:39 +0000 (00:28 -0800)]
Merge tag 'clk-at91-5.17' of git://git./linux/kernel/git/at91/linux into clk-at91

Pull AT91 clk driver updates from Nicolas Ferre:

 - Lan966x Generic Clock Controller driver and associated DT bindings
 - Lan966x clock driver extended to support clock gating

* tag 'clk-at91-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/at91/linux:
  clk: lan966x: Extend lan966x clock driver for clock gating support
  dt-bindings: clock: lan966x: Extend includes with clock gates
  dt-bindings: clock: lan966x: Extend for clock gate support
  clk: gate: Add devm_clk_hw_register_gate()
  clk: lan966x: Add lan966x SoC clock driver
  dt-bindings: clock: lan966x: Add LAN966X Clock Controller
  dt-bindings: clock: lan966x: Add binding includes for lan966x SoC clock IDs

3 years agoclk: lan966x: Extend lan966x clock driver for clock gating support
Horatiu Vultur [Wed, 3 Nov 2021 08:51:02 +0000 (09:51 +0100)]
clk: lan966x: Extend lan966x clock driver for clock gating support

Extend the clock driver to add support also for clock gating. The
following peripherals can be gated: UHPHS, UDPHS, MCRAMC, HMATRIX.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20211103085102.1656081-5-horatiu.vultur@microchip.com
3 years agodt-bindings: clock: lan966x: Extend includes with clock gates
Horatiu Vultur [Wed, 3 Nov 2021 08:51:01 +0000 (09:51 +0100)]
dt-bindings: clock: lan966x: Extend includes with clock gates

On lan966x it is allow to control the clock to some peripherals like
USB. So extend the include file with these clocks.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20211103085102.1656081-4-horatiu.vultur@microchip.com
3 years agodt-bindings: clock: lan966x: Extend for clock gate support
Horatiu Vultur [Wed, 3 Nov 2021 08:51:00 +0000 (09:51 +0100)]
dt-bindings: clock: lan966x: Extend for clock gate support

Allow to add an optional resource to be able to access the clock gate
registers.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20211103085102.1656081-3-horatiu.vultur@microchip.com
3 years agoclk: gate: Add devm_clk_hw_register_gate()
Horatiu Vultur [Wed, 3 Nov 2021 08:50:59 +0000 (09:50 +0100)]
clk: gate: Add devm_clk_hw_register_gate()

Add devm_clk_hw_register_gate() - devres-managed version of
clk_hw_register_gate()

Suggested-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20211103085102.1656081-2-horatiu.vultur@microchip.com
3 years agoclk: lan966x: Add lan966x SoC clock driver
Kavyasree Kotagiri [Wed, 3 Nov 2021 06:19:35 +0000 (11:49 +0530)]
clk: lan966x: Add lan966x SoC clock driver

This adds Generic Clock Controller driver for lan966x SoC.

Lan966x clock controller contains 3 PLLs - cpu_clk, ddr_clk
and sys_clk. It generates and supplies clock to various
peripherals within SoC.
Register settings required to provide GCK clocking to a
peripheral is as below:
GCK_SRC_SEL     = Select clock source.
GCK_PRESCALER   = Set divider value.
GCK_ENA         = 1 - Enable GCK clock.

Signed-off-by: Kavyasree Kotagiri <kavyasree.kotagiri@microchip.com>
Co-developed-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20211103061935.25677-4-kavyasree.kotagiri@microchip.com
3 years agodt-bindings: clock: lan966x: Add LAN966X Clock Controller
Kavyasree Kotagiri [Wed, 3 Nov 2021 06:19:34 +0000 (11:49 +0530)]
dt-bindings: clock: lan966x: Add LAN966X Clock Controller

This adds the DT bindings documentation for lan966x SoC
generic clock controller.

Signed-off-by: Kavyasree Kotagiri <kavyasree.kotagiri@microchip.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20211103061935.25677-3-kavyasree.kotagiri@microchip.com
3 years agodt-bindings: clock: lan966x: Add binding includes for lan966x SoC clock IDs
Kavyasree Kotagiri [Wed, 3 Nov 2021 06:19:33 +0000 (11:49 +0530)]
dt-bindings: clock: lan966x: Add binding includes for lan966x SoC clock IDs

LAN966X supports 14 clock outputs for its peripherals.
This include file is introduced to use identifiers for clocks.

Signed-off-by: Kavyasree Kotagiri <kavyasree.kotagiri@microchip.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20211103061935.25677-2-kavyasree.kotagiri@microchip.com
3 years agoclk: renesas: r9a07g044: Add GPU clock and reset entries
Biju Das [Fri, 3 Dec 2021 11:51:51 +0000 (11:51 +0000)]
clk: renesas: r9a07g044: Add GPU clock and reset entries

Add GPU clock and reset entries to CPG driver.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20211203115154.31864-4-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: r9a07g044: Add mux and divider for G clock
Biju Das [Fri, 3 Dec 2021 11:51:50 +0000 (11:51 +0000)]
clk: renesas: r9a07g044: Add mux and divider for G clock

G clock is sourced from PLL3 and PLL6. The output of the mux is
connected to divider.

This patch adds a mux and divider for getting different rates from
this clock sources.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20211203115154.31864-3-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: r9a07g044: Rename CLK_PLL3_DIV4 macro
Biju Das [Fri, 3 Dec 2021 11:51:49 +0000 (11:51 +0000)]
clk: renesas: r9a07g044: Rename CLK_PLL3_DIV4 macro

Rename the macro CLK_PLL3_DIV4->CLK_PLL3_DIV2_2 to match the clock tree
mentioned in the hardware manual(Rev.1.00 Sep, 2021).

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20211203115154.31864-2-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: cpg-mssr: Add support for R-Car S4-8
Yoshihiro Shimoda [Wed, 1 Dec 2021 07:33:03 +0000 (16:33 +0900)]
clk: renesas: cpg-mssr: Add support for R-Car S4-8

Initial CPG support for R-Car S4-8 (r8a779f0).

Inspired by patches in the BSP by LUU HOAI.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20211201073308.1003945-10-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoMerge tag 'renesas-r8a779f0-dt-binding-defs-tag' into HEAD
Geert Uytterhoeven [Wed, 8 Dec 2021 09:05:50 +0000 (10:05 +0100)]
Merge tag 'renesas-r8a779f0-dt-binding-defs-tag' into HEAD

Renesas R-Car S4-8 DT Binding Definitions

Clock and Power Domain definitions for the Renesas R-Car S4-8 (R8A77FA0)
SoC, shared by driver and DT source files.

3 years agoclk: renesas: rcar-gen4: Introduce R-Car Gen4 CPG driver
Yoshihiro Shimoda [Wed, 1 Dec 2021 07:33:02 +0000 (16:33 +0900)]
clk: renesas: rcar-gen4: Introduce R-Car Gen4 CPG driver

According to the official website [1], the R-Car V3U SoC is based
on the R-Car Gen4 architecture. So, introduce R-Car Gen4 CPG
driver.

[1]
https://www.renesas.com/us/en/products/automotive-products/automotive-system-chips-socs/r-car-v3u-best-class-r-car-v3u-asil-d-system-chip-automated-driving

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20211201073308.1003945-9-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoMerge tag 'renesas-clk-for-v5.17-tag1' of git://git.kernel.org/pub/scm/linux/kernel...
Stephen Boyd [Wed, 8 Dec 2021 04:16:36 +0000 (20:16 -0800)]
Merge tag 'renesas-clk-for-v5.17-tag1' of git://git./linux/kernel/git/geert/renesas-drivers into clk-renesas

Pull Renesas clk driver updates from Geert Uytterhoeven:

 - Add serial (SCI1), watchdog (WDT), timer (OSTM), SPI (RSPI), and
   thermal (TSU) clocks and resets on RZ/G2L
 - Rework SDHI clock handling in the R-Car Gen3 and RZ/G2 clock
   drivers, and in the Renesas SDHI driver
 - Make the Cortex-A55 (I) clock on RZ/G2L programmable,
 - Document support for the new R-Car S4-8 (R8A779F0) SoC
 - Miscellaneous fixes and improvements

* tag 'renesas-clk-for-v5.17-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers: (24 commits)
  clk: renesas: r9a07g044: Add TSU clock and reset entry
  mmc: renesas_sdhi: Simplify an expression
  mmc: renesas_sdhi: Use devm_clk_get_optional() to obtain CD clock
  dt-bindings: clock: renesas,cpg-mssr: Document r8a779f0
  clk: renesas: cpg-mssr: propagate return value of_genpd_add_provider_simple()
  clk: renesas: cpg-mssr: Check return value of pm_genpd_init()
  clk: renesas: rzg2l: propagate return value of_genpd_add_provider_simple()
  clk: renesas: rzg2l: Check return value of pm_genpd_init()
  clk: renesas: r9a07g044: Add RSPI clock and reset entries
  clk: renesas: r9a07g044: Change core clock "I" from DEF_FIXED->DEF_DIV
  clk: renesas: rzg2l: Add CPG_PL1_DDIV macro
  mmc: renesas_sdhi: Parse DT for SDnH
  mmc: renesas_sdhi: Use dev_err_probe when getting clock fails
  clk: renesas: rcar-gen3: Remove outdated SD_SKIP_FIRST
  clk: renesas: rcar-gen3: Switch to new SD clock handling
  mmc: renesas_sdhi: Flag non-standard SDnH handling for V3M
  clk: renesas: r8a779a0: Add SDnH clock to V3U
  clk: renesas: rcar-gen3: Add SDnH clock
  clk: renesas: rcar-gen3: Add dummy SDnH clock
  clk: renesas: r9a07g044: Add OSTM clock and reset entries
  ...

3 years agodt-bindings: clock: Add r8a779f0 CPG Core Clock Definitions
Yoshihiro Shimoda [Wed, 1 Dec 2021 07:32:57 +0000 (16:32 +0900)]
dt-bindings: clock: Add r8a779f0 CPG Core Clock Definitions

Add all Clock Pulse Generator Core Clock Outputs for the Renesas
R-Car S4-8 (R8A779F0) SoC.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20211201073308.1003945-4-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agodt-bindings: power: Add r8a779f0 SYSC power domain definitions
Yoshihiro Shimoda [Wed, 1 Dec 2021 07:32:56 +0000 (16:32 +0900)]
dt-bindings: power: Add r8a779f0 SYSC power domain definitions

Add power domain indices for R-Car S4-8 (r8a779f0).

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20211201073308.1003945-3-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: Gemini: fix struct name in kernel-doc
Randy Dunlap [Sat, 20 Nov 2021 06:27:19 +0000 (22:27 -0800)]
clk: Gemini: fix struct name in kernel-doc

Fix a typo in the struct name in the kernel-doc notation so that
kernel-doc won't complain about it.

Fixes this warning:

drivers/clk/clk-gemini.c:64: warning: expecting prototype for struct gemini_data_data. Prototype was for struct gemini_gate_data instead

Fixes: 846423f96721 ("clk: Add Gemini SoC clock controller")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: kernel test robot <lkp@intel.com>
Cc: linux-clk@vger.kernel.org
Link: https://lore.kernel.org/r/20211120062719.21395-1-rdunlap@infradead.org
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
3 years agoclk: zynq: pll: Fix kernel-doc warnings
Shubhrajyoti Datta [Wed, 17 Nov 2021 09:08:54 +0000 (14:38 +0530)]
clk: zynq: pll: Fix kernel-doc warnings

Fix the following kernel-doc warning

drivers/clk/zynq/pll.c:15: warning: missing initial short description on line:
 * struct zynq_pll
drivers/clk/zynq/pll.c:96: warning: No description found for return value of 'zynq_pll_is_enabled'
drivers/clk/zynq/pll.c:116: warning: No description found for return value of 'zynq_pll_enable'
drivers/clk/zynq/pll.c:187: warning: No description found for return value of 'clk_register_zynq_pll'

Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
Link: https://lore.kernel.org/r/9929a56462bfdd491c43c233abc4341fc14dac1d.1637139796.git.shubhrajyoti.datta@xilinx.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
3 years agoclk: imx: pllv1: fix kernel-doc notation for struct clk_pllv1
Randy Dunlap [Mon, 15 Nov 2021 03:26:07 +0000 (19:26 -0800)]
clk: imx: pllv1: fix kernel-doc notation for struct clk_pllv1

Convert struct clk_pllv1 comments to kernel-doc notation and move them
below the MFN_* macros.

Fixes this kernel-doc warning:

drivers/clk/imx/clk-pllv1.c:12: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
    * pll v1

Fixes: 2af9e6db14db ("ARM i.MX: Add common clock support for pllv1")
Fixes: a594790368a8 ("ARM: imx: pllv1: Fix PLL calculation for i.MX27")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: kernel test robot <lkp@intel.com>
Cc: Abel Vesa <abel.vesa@nxp.com>
Cc: linux-clk@vger.kernel.org
Cc: linux-imx@nxp.com
Cc: Alexander Shiyan <shc_work@mail.ru>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Link: https://lore.kernel.org/r/20211115032607.28970-1-rdunlap@infradead.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
3 years agoclk: meson: gxbb: Fix the SDM_EN bit for MPLL0 on GXBB
Martin Blumenstingl [Sun, 31 Oct 2021 13:50:06 +0000 (14:50 +0100)]
clk: meson: gxbb: Fix the SDM_EN bit for MPLL0 on GXBB

There are reports that 48kHz audio does not work on the WeTek Play 2
(which uses a GXBB SoC), while 44.1kHz audio works fine on the same
board. There are also reports of 48kHz audio working fine on GXL and
GXM SoCs, which are using an (almost) identical AIU (audio controller).

Experimenting has shown that MPLL0 is causing this problem. In the .dts
we have by default:
assigned-clocks = <&clkc CLKID_MPLL0>,
  <&clkc CLKID_MPLL1>,
  <&clkc CLKID_MPLL2>;
assigned-clock-rates = <294912000>,
       <270950400>,
       <393216000>;
The MPLL0 rate is divisible by 48kHz without remainder and the MPLL1
rate is divisible by 44.1kHz without remainder. Swapping these two clock
rates "fixes" 48kHz audio but breaks 44.1kHz audio.

Everything looks normal when looking at the info provided by the common
clock framework while playing 48kHz audio (via I2S with mclk-fs = 256):
        mpll_prediv                 1        1        0  2000000000
           mpll0_div                1        1        0   294909641
              mpll0                 1        1        0   294909641
                 cts_amclk_sel       1        1        0   294909641
                    cts_amclk_div       1        1        0    12287902
                       cts_amclk       1        1        0    12287902

meson-clk-msr however shows that the actual MPLL0 clock is off by more
than 38MHz:
        mp0_out               333322917    +/-10416Hz

The rate seen by meson-clk-msr is very close to what we would get when
SDM (the fractional part) was ignored:
  (2000000000Hz * 16384) / ((16384 * 6) = 333.33MHz
If SDM was considered the we should get close to:
  (2000000000Hz * 16384) / ((16384 * 6) + 12808) = 294.9MHz

Further experimenting shows that HHI_MPLL_CNTL7[15] does not have any
effect on the rate of MPLL0 as seen my meson-clk-msr (regardless of
whether that bit is zero or one the rate is always the same according to
meson-clk-msr). Using HHI_MPLL_CNTL[25] on the other hand as SDM_EN
results in SDM being considered for the rate output by the hardware. The
rate - as seen by meson-clk-msr - matches with what we expect when
SDM_EN is enabled (fractional part is being considered, resulting in a
294.9MHz output) or disable (fractional part being ignored, resulting in
a 333.33MHz output).

Reported-by: Christian Hewitt <christianshewitt@gmail.com>
Tested-by: Christian Hewitt <christianshewitt@gmail.com>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20211031135006.1508796-1-martin.blumenstingl@googlemail.com
3 years agoclk: renesas: r9a07g044: Add TSU clock and reset entry
Biju Das [Sat, 20 Nov 2021 18:04:38 +0000 (18:04 +0000)]
clk: renesas: r9a07g044: Add TSU clock and reset entry

Add TSU clock and reset entry to CPG driver.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20211120180438.8351-1-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agommc: renesas_sdhi: Simplify an expression
Wolfram Sang [Wed, 17 Nov 2021 10:38:50 +0000 (11:38 +0100)]
mmc: renesas_sdhi: Simplify an expression

We already have 'quirks', no need to go via 'priv'.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://lore.kernel.org/r/20211117103850.28397-1-wsa+renesas@sang-engineering.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agommc: renesas_sdhi: Use devm_clk_get_optional() to obtain CD clock
Geert Uytterhoeven [Tue, 16 Nov 2021 13:36:07 +0000 (14:36 +0100)]
mmc: renesas_sdhi: Use devm_clk_get_optional() to obtain CD clock

Use the existing devm_clk_get_optional() helper to obtain the optional
Card Detect clock, instead of open-coding the same operation.
a side effect, real errors will now be handled correctly instead of
being ignored.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/540d803d31bf9aa1d0f78f431cae0ccd05387edc.1637069733.git.geert+renesas@glider.be
3 years agoclk: sunxi-ng: Add support for the D1 SoC clocks
Samuel Holland [Fri, 19 Nov 2021 04:35:44 +0000 (22:35 -0600)]
clk: sunxi-ng: Add support for the D1 SoC clocks

The D1 SoC contains a CCU and a R_CCU (PRCM CCU). Add support for them.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20211119043545.4010-7-samuel@sholland.org
3 years agoclk: sunxi-ng: gate: Add macros for gates with fixed dividers
Samuel Holland [Fri, 19 Nov 2021 04:35:43 +0000 (22:35 -0600)]
clk: sunxi-ng: gate: Add macros for gates with fixed dividers

It is possible to declare a gate with a fixed divider, by using the
CCU_FEATURE_ALL_PREDIV flag. Since this is not obvious, add a macro
for declaring this type of clock.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20211119043545.4010-6-samuel@sholland.org
3 years agoclk: sunxi-ng: mux: Add macros using clk_parent_data and clk_hw
Samuel Holland [Fri, 19 Nov 2021 04:35:42 +0000 (22:35 -0600)]
clk: sunxi-ng: mux: Add macros using clk_parent_data and clk_hw

Referencing parents with clk_hw pointers is more efficient and removes
the dependency on global clock names. clk_parent_data is needed when
some parent clocks are provided from another driver. Add macros for
declaring muxes that take advantage of these.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20211119043545.4010-5-samuel@sholland.org
3 years agoclk: sunxi-ng: mp: Add macros using clk_parent_data and clk_hw
Samuel Holland [Fri, 19 Nov 2021 04:35:41 +0000 (22:35 -0600)]
clk: sunxi-ng: mp: Add macros using clk_parent_data and clk_hw

Referencing parents with clk_hw pointers is more efficient and removes
the dependency on global clock names. clk_parent_data is needed when
some parent clocks are provided from another driver. Add macros for
declaring dividers that take advantage of these.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20211119043545.4010-4-samuel@sholland.org
3 years agoclk: sunxi-ng: div: Add macros using clk_parent_data and clk_hw
Samuel Holland [Fri, 19 Nov 2021 04:35:40 +0000 (22:35 -0600)]
clk: sunxi-ng: div: Add macros using clk_parent_data and clk_hw

Referencing parents with clk_hw pointers is more efficient and removes
the dependency on global clock names. clk_parent_data is needed when
some parent clocks are provided from another driver. Add macros for
declaring dividers that take advantage of these.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20211119043545.4010-3-samuel@sholland.org
3 years agodt-bindings: clk: Add compatibles for D1 CCUs
Samuel Holland [Fri, 19 Nov 2021 04:35:39 +0000 (22:35 -0600)]
dt-bindings: clk: Add compatibles for D1 CCUs

The D1 has a CCU and a R_CCU (PRCM CCU) like most other sunxi SoCs, with
3 and 4 clock inputs, respectively. Add the compatibles and bindings.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20211119043545.4010-2-samuel@sholland.org
3 years agoclk: sunxi-ng: Allow the CCU core to be built as a module
Samuel Holland [Fri, 19 Nov 2021 03:33:37 +0000 (21:33 -0600)]
clk: sunxi-ng: Allow the CCU core to be built as a module

Like the individual CCU drivers, it can be beneficial for memory
consumption of cross-platform configurations to only load the CCU core
on the relevant platform. For example, a generic arm64 kernel sees the
following improvement when building the CCU core and drivers as modules:

  before:
    text      data     bss     dec       hex      filename
    13882360  5251670  360800  19494830  12977ae  vmlinux

  after:
    text      data     bss     dec       hex      filename
    13734787  5086442  360800  19182029  124b1cd  vmlinux

So the result is a 390KB total reduction in kernel image size.

The one early clock provider (sun5i) requires the core to be built in.

Now that loading the MMC driver will trigger loading the CCU core, the
MMC timing mode functions do not need a compile-time fallback.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20211119033338.25486-5-samuel@sholland.org
3 years agoclk: sunxi-ng: Convert early providers to platform drivers
Samuel Holland [Fri, 19 Nov 2021 03:33:36 +0000 (21:33 -0600)]
clk: sunxi-ng: Convert early providers to platform drivers

The PRCM CCU drivers depend on clocks provided by other CCU drivers. For
example, the sun8i-r-ccu driver uses the "pll-periph" clock provided by
the SoC's main CCU.

However, sun8i-r-ccu is an early OF clock provider, and many of the
main CCUs (e.g. sun50i-a64-ccu) use platform drivers. This means that
the consumer clocks will be orphaned until the supplier driver is bound.
This can be avoided by converting the remaining CCUs to use platform
drivers. Then fw_devlink will ensure the drivers are bound in the
optimal order.

The sun5i CCU is the only one which actually needs to be an early clock
provider, because it provides the clock for the system timer. That one
is left alone.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20211119033338.25486-4-samuel@sholland.org
3 years agoclk: sunxi-ng: Allow drivers to be built as modules
Samuel Holland [Fri, 19 Nov 2021 03:33:35 +0000 (21:33 -0600)]
clk: sunxi-ng: Allow drivers to be built as modules

While it is useful to build all of the CCU drivers at once, only 1-3 of
them will be loaded at a time, or possibly none of them if the kernel is
booted on a non-sunxi platform. These CCU drivers are relatively large;
32-bit drivers have 30-50k of data each, while the 64-bit ones are
50-75k due to the increased pointer overhead. About half of that data
comes from relocations. Let's allow the user to build these drivers as
modules so only the necessary data is loaded.

As a first step, convert the CCUs that are already platform drivers.

When the drivers are built as modules, normally the file name becomes
the module name. However, the current file names are inconsistent with
the <platform>-<peripheral> name used everywhere else: the devicetree
bindings, the platform driver names, and the Kconfig symbols. Use
Makfile logic to rename the modules so they follow the usual pattern.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20211119033338.25486-3-samuel@sholland.org
3 years agoclk: sunxi-ng: Export symbols used by CCU drivers
Samuel Holland [Fri, 19 Nov 2021 03:33:34 +0000 (21:33 -0600)]
clk: sunxi-ng: Export symbols used by CCU drivers

For the individual CCU drivers to be built as modules, the ops structs,
helper functions, and callback registration functions must be exported.
These symbols are intended for use only by the adjacent CCU drivers, so
export them into the SUNXI_CCU namespace.

of_sunxi_ccu_probe is not exported because it is only used by built-in
OF clock providers.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20211119033338.25486-2-samuel@sholland.org
3 years agodt-bindings: clock: renesas,cpg-mssr: Document r8a779f0
Yoshihiro Shimoda [Tue, 16 Nov 2021 07:41:20 +0000 (16:41 +0900)]
dt-bindings: clock: renesas,cpg-mssr: Document r8a779f0

Add binding documentation for the R-Car S4-8 (R8A779F0) Clock Pulse
Generator.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20211116074130.107554-7-yoshihiro.shimoda.uh@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: cpg-mssr: propagate return value of_genpd_add_provider_simple()
Lad Prabhakar [Wed, 17 Nov 2021 11:51:01 +0000 (11:51 +0000)]
clk: renesas: cpg-mssr: propagate return value of_genpd_add_provider_simple()

of_genpd_add_provider_simple() might fail, this patch makes sure we check
the return value of of_genpd_add_provider_simple() by propagating the
return value to the caller of cpg_mssr_add_clk_domain().

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20211117115101.28281-5-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: cpg-mssr: Check return value of pm_genpd_init()
Lad Prabhakar [Wed, 17 Nov 2021 11:51:00 +0000 (11:51 +0000)]
clk: renesas: cpg-mssr: Check return value of pm_genpd_init()

Make sure we check the return value of pm_genpd_init() which might fail.
Also add a devres action to remove the power-domain in-case the probe
callback fails further down in the code flow.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20211117115101.28281-4-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: rzg2l: propagate return value of_genpd_add_provider_simple()
Lad Prabhakar [Wed, 17 Nov 2021 11:50:59 +0000 (11:50 +0000)]
clk: renesas: rzg2l: propagate return value of_genpd_add_provider_simple()

of_genpd_add_provider_simple() might fail, this patch makes sure we check
the return value of of_genpd_add_provider_simple() by propagating the
return value to the caller of rzg2l_cpg_add_clk_domain().

Fixes: ef3c613ccd68a ("clk: renesas: Add CPG core wrapper for RZ/G2L SoC")
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20211117115101.28281-3-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: rzg2l: Check return value of pm_genpd_init()
Lad Prabhakar [Wed, 17 Nov 2021 11:50:58 +0000 (11:50 +0000)]
clk: renesas: rzg2l: Check return value of pm_genpd_init()

Make sure we check the return value of pm_genpd_init() which might fail.
Also add a devres action to remove the power-domain in-case the probe
callback fails further down in the code flow.

Fixes: ef3c613ccd68a ("clk: renesas: Add CPG core wrapper for RZ/G2L SoC")
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20211117115101.28281-2-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: r9a07g044: Add RSPI clock and reset entries
Lad Prabhakar [Wed, 17 Nov 2021 00:26:01 +0000 (00:26 +0000)]
clk: renesas: r9a07g044: Add RSPI clock and reset entries

Add RSPI{0,1,2} clock and reset entries to CPG driver.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20211117002601.17971-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: r9a07g044: Change core clock "I" from DEF_FIXED->DEF_DIV
Biju Das [Fri, 12 Nov 2021 08:10:01 +0000 (08:10 +0000)]
clk: renesas: r9a07g044: Change core clock "I" from DEF_FIXED->DEF_DIV

Core clock "I" is sourced from CPG_PL1_DDIV divider as per HW manual
Rev.1.00.

This patch adds clock divider table "dtable_1_8" and switches to
DEF_DIV for "I" clock.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20211112081003.15453-3-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: rzg2l: Add CPG_PL1_DDIV macro
Biju Das [Fri, 12 Nov 2021 08:10:00 +0000 (08:10 +0000)]
clk: renesas: rzg2l: Add CPG_PL1_DDIV macro

Core clock "I" is sourced from  CPG_PL1_DDIV which controls CPU
frequency. Define CPG_PL1_DDIV, so that we can register it as a
clock divider in later patch.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20211112081003.15453-2-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agommc: renesas_sdhi: Parse DT for SDnH
Wolfram Sang [Wed, 10 Nov 2021 19:16:09 +0000 (20:16 +0100)]
mmc: renesas_sdhi: Parse DT for SDnH

If there is a SDnH clock provided in DT, let's use it instead of relying
on the fallback.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20211110191610.5664-21-wsa+renesas@sang-engineering.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agommc: renesas_sdhi: Use dev_err_probe when getting clock fails
Wolfram Sang [Wed, 10 Nov 2021 19:16:08 +0000 (20:16 +0100)]
mmc: renesas_sdhi: Use dev_err_probe when getting clock fails

This is to improve deferred probe in this driver and to keep consistent
with an up-to-date handling of a soon to be added second clock.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20211110191610.5664-20-wsa+renesas@sang-engineering.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: rcar-gen3: Remove outdated SD_SKIP_FIRST
Wolfram Sang [Wed, 10 Nov 2021 19:15:55 +0000 (20:15 +0100)]
clk: renesas: rcar-gen3: Remove outdated SD_SKIP_FIRST

We handle it differently meanwhile.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20211110191610.5664-7-wsa+renesas@sang-engineering.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: rcar-gen3: Switch to new SD clock handling
Wolfram Sang [Wed, 10 Nov 2021 19:15:54 +0000 (20:15 +0100)]
clk: renesas: rcar-gen3: Switch to new SD clock handling

The old SD handling code was huge and could not handle all the details
which showed up on R-Car Gen3 SoCs meanwhile. It is time to switch to
another design. Have SDnH a separate clock, use the existing divider
clocks and move the errata handling from the clock driver to the SDHI
driver where it belongs.

This patch removes the old SD handling code and switch to the new one.
This updates the SDHI driver at the same time. Because the SDHI driver
can only communicate with the clock driver via clk_set_rate(), I don't
see an alternative to this flag-day-approach, so we cross subsystems
here.

The patch sadly looks messy for the CPG lib, but it is basically a huge
chunk of code removed and smaller chunks added. It looks much better
when you just view the resulting source file.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # For MMC
Link: https://lore.kernel.org/r/20211110191610.5664-6-wsa+renesas@sang-engineering.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agommc: renesas_sdhi: Flag non-standard SDnH handling for V3M
Wolfram Sang [Wed, 10 Nov 2021 19:15:53 +0000 (20:15 +0100)]
mmc: renesas_sdhi: Flag non-standard SDnH handling for V3M

V3M handles SDnH differently than other Gen3 SoCs, so let's add a
separate entry for that. This will allow better SDnH handling in the
future.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20211110191610.5664-5-wsa+renesas@sang-engineering.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: r8a779a0: Add SDnH clock to V3U
Wolfram Sang [Wed, 10 Nov 2021 19:15:52 +0000 (20:15 +0100)]
clk: renesas: r8a779a0: Add SDnH clock to V3U

Currently a pass-through clock but we will make it a real divider clock
in the next patches.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20211110191610.5664-4-wsa+renesas@sang-engineering.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: rcar-gen3: Add SDnH clock
Wolfram Sang [Wed, 10 Nov 2021 19:15:51 +0000 (20:15 +0100)]
clk: renesas: rcar-gen3: Add SDnH clock

Currently a pass-through clock but we will make it a real divider clock
in the next patches.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20211110191610.5664-3-wsa+renesas@sang-engineering.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: rcar-gen3: Add dummy SDnH clock
Wolfram Sang [Wed, 10 Nov 2021 19:15:50 +0000 (20:15 +0100)]
clk: renesas: rcar-gen3: Add dummy SDnH clock

Currently, SDnH is handled together with SDn. This caused lots of
problems, so we want SDnH as a separate clock. Introduce a dummy SDnH
type here which creates a fixed-factor clock with factor 1. That allows
us to convert the per-SoC CPG drivers while keeping the old behaviour
for now. A later patch then will add the proper functionality.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20211110191610.5664-2-wsa+renesas@sang-engineering.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: r9a07g044: Add OSTM clock and reset entries
Biju Das [Wed, 10 Nov 2021 08:20:19 +0000 (08:20 +0000)]
clk: renesas: r9a07g044: Add OSTM clock and reset entries

Add OSTM{0,1,2} clock and reset entries to CPG driver.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20211110082019.28554-2-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: r9a07g044: Rename CLK_PLL2_DIV16 and CLK_PLL2_DIV20 macros
Biju Das [Wed, 10 Nov 2021 08:20:18 +0000 (08:20 +0000)]
clk: renesas: r9a07g044: Rename CLK_PLL2_DIV16 and CLK_PLL2_DIV20 macros

Rename the macros CLK_PLL2_DIV16->CLK_PLL2_DIV2_8 and
CLK_PLL2_DIV20->CLK_PLL2_DIV2_10 to match the clock tree mentioned in
the hardware manual(Rev.1.00 Sep, 2021).

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20211110082019.28554-1-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: r9a07g044: Add WDT clock and reset entries
Biju Das [Thu, 4 Nov 2021 16:08:57 +0000 (16:08 +0000)]
clk: renesas: r9a07g044: Add WDT clock and reset entries

Add WDT{0,1,2} clock and reset entries to CPG driver.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20211104160858.15550-4-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: r9a07g044: Add clock and reset entry for SCI1
Lad Prabhakar [Wed, 3 Nov 2021 16:05:37 +0000 (16:05 +0000)]
clk: renesas: r9a07g044: Add clock and reset entry for SCI1

Add clock and reset entry for SCI1 interface.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20211103160537.32253-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
3 years agoclk: renesas: rzg2l: Add missing kerneldoc for resets
Geert Uytterhoeven [Tue, 19 Oct 2021 12:35:36 +0000 (14:35 +0200)]
clk: renesas: rzg2l: Add missing kerneldoc for resets

make W=1:

    drivers/clk/renesas/rzg2l-cpg.c:95: warning: Function parameter or member 'num_resets' not described in 'rzg2l_cpg_priv'

Add the missing kerneldoc for fields in struct rzg2l_cpg_priv and struct
rzg2l_cpg_info related to Module Resets.

Fixes: c3e67ad6f5a2c698 ("dt-bindings: clock: r9a07g044-cpg: Update clock/reset definitions")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://lore.kernel.org/r/39c2c5fd4232b6620a4a56dba4e2b0d61476ee36.1634646869.git.geert+renesas@glider.be
3 years agoLinux 5.16-rc1
Linus Torvalds [Sun, 14 Nov 2021 21:56:52 +0000 (13:56 -0800)]
Linux 5.16-rc1

3 years agokconfig: Add support for -Wimplicit-fallthrough
Gustavo A. R. Silva [Sun, 14 Nov 2021 00:57:25 +0000 (18:57 -0600)]
kconfig: Add support for -Wimplicit-fallthrough

Add Kconfig support for -Wimplicit-fallthrough for both GCC and Clang.

The compiler option is under configuration CC_IMPLICIT_FALLTHROUGH,
which is enabled by default.

Special thanks to Nathan Chancellor who fixed the Clang bug[1][2]. This
bugfix only appears in Clang 14.0.0, so older versions still contain
the bug and -Wimplicit-fallthrough won't be enabled for them, for now.

This concludes a long journey and now we are finally getting rid
of the unintentional fallthrough bug-class in the kernel, entirely. :)

Link: https://github.com/llvm/llvm-project/commit/9ed4a94d6451046a51ef393cd62f00710820a7e8
Link: https://bugs.llvm.org/show_bug.cgi?id=51094
Link: https://github.com/KSPP/linux/issues/115
Link: https://github.com/ClangBuiltLinux/linux/issues/236
Co-developed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Co-developed-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
3 years agoMerge tag 'xfs-5.16-merge-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Linus Torvalds [Sun, 14 Nov 2021 20:18:22 +0000 (12:18 -0800)]
Merge tag 'xfs-5.16-merge-5' of git://git./fs/xfs/xfs-linux

Pull xfs cleanups from Darrick Wong:
 "The most 'exciting' aspect of this branch is that the xfsprogs
  maintainer and I have worked through the last of the code
  discrepancies between kernel and userspace libxfs such that there are
  no code differences between the two except for #includes.

  IOWs, diff suffices to demonstrate that the userspace tools behave the
  same as the kernel, and kernel-only bits are clearly marked in the
  /kernel/ source code instead of just the userspace source.

  Summary:

   - Clean up open-coded swap() calls.

   - A little bit of #ifdef golf to complete the reunification of the
     kernel and userspace libxfs source code"

* tag 'xfs-5.16-merge-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: sync xfs_btree_split macros with userspace libxfs
  xfs: #ifdef out perag code for userspace
  xfs: use swap() to make dabtree code cleaner

3 years agoMerge tag 'for-5.16/parisc-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
Linus Torvalds [Sun, 14 Nov 2021 19:53:59 +0000 (11:53 -0800)]
Merge tag 'for-5.16/parisc-3' of git://git./linux/kernel/git/deller/parisc-linux

Pull more parisc fixes from Helge Deller:
 "Fix a build error in stracktrace.c, fix resolving of addresses to
  function names in backtraces, fix single-stepping in assembly code and
  flush userspace pte's when using set_pte_at()"

* tag 'for-5.16/parisc-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc/entry: fix trace test in syscall exit path
  parisc: Flush kernel data mapping in set_pte_at() when installing pte for user page
  parisc: Fix implicit declaration of function '__kernel_text_address'
  parisc: Fix backtrace to always include init funtion names

3 years agoMerge tag 'sh-for-5.16' of git://git.libc.org/linux-sh
Linus Torvalds [Sun, 14 Nov 2021 19:37:49 +0000 (11:37 -0800)]
Merge tag 'sh-for-5.16' of git://git.libc.org/linux-sh

Pull arch/sh updates from Rich Felker.

* tag 'sh-for-5.16' of git://git.libc.org/linux-sh:
  sh: pgtable-3level: Fix cast to pointer from integer of different size
  sh: fix READ/WRITE redefinition warnings
  sh: define __BIG_ENDIAN for math-emu
  sh: math-emu: drop unused functions
  sh: fix kconfig unmet dependency warning for FRAME_POINTER
  sh: Cleanup about SPARSE_IRQ
  sh: kdump: add some attribute to function
  maple: fix wrong return value of maple_bus_init().
  sh: boot: avoid unneeded rebuilds under arch/sh/boot/compressed/
  sh: boot: add intermediate vmlinux.bin* to targets instead of extra-y
  sh: boards: Fix the cacography in irq.c
  sh: check return code of request_irq
  sh: fix trivial misannotations

3 years agoMerge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
Linus Torvalds [Sun, 14 Nov 2021 19:30:50 +0000 (11:30 -0800)]
Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:

 - Fix early_iounmap

 - Drop cc-option fallbacks for architecture selection

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 9156/1: drop cc-option fallbacks for architecture selection
  ARM: 9155/1: fix early early_iounmap()

3 years agoMerge tag 'devicetree-fixes-for-5.16-1' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 14 Nov 2021 19:11:51 +0000 (11:11 -0800)]
Merge tag 'devicetree-fixes-for-5.16-1' of git://git./linux/kernel/git/robh/linux

Pull devicetree fixes from Rob Herring:

 - Two fixes due to DT node name changes on Arm, Ltd. boards

 - Treewide rename of Ingenic CGU headers

 - Update ST email addresses

 - Remove Netlogic DT bindings

 - Dropping few more cases of redundant 'maxItems' in schemas

 - Convert toshiba,tc358767 bridge binding to schema

* tag 'devicetree-fixes-for-5.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  dt-bindings: watchdog: sunxi: fix error in schema
  bindings: media: venus: Drop redundant maxItems for power-domain-names
  dt-bindings: Remove Netlogic bindings
  clk: versatile: clk-icst: Ensure clock names are unique
  of: Support using 'mask' in making device bus id
  dt-bindings: treewide: Update @st.com email address to @foss.st.com
  dt-bindings: media: Update maintainers for st,stm32-hwspinlock.yaml
  dt-bindings: media: Update maintainers for st,stm32-cec.yaml
  dt-bindings: mfd: timers: Update maintainers for st,stm32-timers
  dt-bindings: timer: Update maintainers for st,stm32-timer
  dt-bindings: i2c: imx: hardware do not restrict clock-frequency to only 100 and 400 kHz
  dt-bindings: display: bridge: Convert toshiba,tc358767.txt to yaml
  dt-bindings: Rename Ingenic CGU headers to ingenic,*.h

3 years agoMerge tag 'timers-urgent-2021-11-14' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 14 Nov 2021 18:43:38 +0000 (10:43 -0800)]
Merge tag 'timers-urgent-2021-11-14' of git://git./linux/kernel/git/tip/tip

Pull timer fix from Thomas Gleixner:
 "A single fix for POSIX CPU timers to address a problem where POSIX CPU
  timer delivery stops working for a new child task because
  copy_process() copies state information which is only valid for the
  parent task"

* tag 'timers-urgent-2021-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  posix-cpu-timers: Clear task::posix_cputimers_work in copy_process()

3 years agoMerge tag 'irq-urgent-2021-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 14 Nov 2021 18:38:27 +0000 (10:38 -0800)]
Merge tag 'irq-urgent-2021-11-14' of git://git./linux/kernel/git/tip/tip

Pull irq fixes from Thomas Gleixner:
 "A set of fixes for the interrupt subsystem

  Core code:

   - A regression fix for the Open Firmware interrupt mapping code where
     a interrupt controller property in a node caused a map property in
     the same node to be ignored.

  Interrupt chip drivers:

   - Workaround a limitation in SiFive PLIC interrupt chip which
     silently ignores an EOI when the interrupt line is masked.

   - Provide the missing mask/unmask implementation for the CSKY MP
     interrupt controller.

  PCI/MSI:

   - Prevent a use after free when PCI/MSI interrupts are released by
     destroying the sysfs entries before freeing the memory which is
     accessed in the sysfs show() function.

   - Implement a mask quirk for the Nvidia ION AHCI chip which does not
     advertise masking capability despite implementing it. Even worse
     the chip comes out of reset with all MSI entries masked, which due
     to the missing masking capability never get unmasked.

   - Move the check which prevents accessing the MSI[X] masking for XEN
     back into the low level accessors. The recent consolidation missed
     that these accessors can be invoked from places which do not have
     that check which broke XEN. Move them back to he original place
     instead of sprinkling tons of these checks all over the code"

* tag 'irq-urgent-2021-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  of/irq: Don't ignore interrupt-controller when interrupt-map failed
  irqchip/sifive-plic: Fixup EOI failed when masked
  irqchip/csky-mpintc: Fixup mask/unmask implementation
  PCI/MSI: Destroy sysfs before freeing entries
  PCI: Add MSI masking quirk for Nvidia ION AHCI
  PCI/MSI: Deal with devices lying about their MSI mask capability
  PCI/MSI: Move non-mask check back into low level accessors

3 years agoMerge tag 'locking-urgent-2021-11-14' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 14 Nov 2021 18:30:17 +0000 (10:30 -0800)]
Merge tag 'locking-urgent-2021-11-14' of git://git./linux/kernel/git/tip/tip

Pull x86 static call update from Thomas Gleixner:
 "A single fix for static calls to make the trampoline patching more
  robust by placing explicit signature bytes after the call trampoline
  to prevent patching random other jumps like the CFI jump table
  entries"

* tag 'locking-urgent-2021-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  static_call,x86: Robustify trampoline patching

3 years agoMerge tag 'sched_urgent_for_v5.16_rc1' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 14 Nov 2021 17:39:03 +0000 (09:39 -0800)]
Merge tag 'sched_urgent_for_v5.16_rc1' of git://git./linux/kernel/git/tip/tip

Pull scheduler fixes from Borislav Petkov:

 - Avoid touching ~100 config files in order to be able to select the
   preemption model

 - clear cluster CPU masks too, on the CPU unplug path

 - prevent use-after-free in cfs

 - Prevent a race condition when updating CPU cache domains

 - Factor out common shared part of smp_prepare_cpus() into a common
   helper which can be called by both baremetal and Xen, in order to fix
   a booting of Xen PV guests

* tag 'sched_urgent_for_v5.16_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  preempt: Restore preemption model selection configs
  arch_topology: Fix missing clear cluster_cpumask in remove_cpu_topology()
  sched/fair: Prevent dead task groups from regaining cfs_rq's
  sched/core: Mitigate race cpus_share_cache()/update_top_cache_domain()
  x86/smp: Factor out parts of native_smp_prepare_cpus()

3 years agoMerge tag 'perf_urgent_for_v5.16_rc1' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 14 Nov 2021 17:33:12 +0000 (09:33 -0800)]
Merge tag 'perf_urgent_for_v5.16_rc1' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Borislav Petkov:

 - Prevent unintentional page sharing by checking whether a page
   reference to a PMU samples page has been acquired properly before
   that

 - Make sure the LBR_SELECT MSR is saved/restored too

 - Reset the LBR_SELECT MSR when resetting the LBR PMU to clear any
   residual data left

* tag 'perf_urgent_for_v5.16_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/core: Avoid put_page() when GUP fails
  perf/x86/vlbr: Add c->flags to vlbr event constraints
  perf/x86/lbr: Reset LBR_SELECT during vlbr reset

3 years agoMerge tag 'x86_urgent_for_v5.16_rc1' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 14 Nov 2021 17:29:03 +0000 (09:29 -0800)]
Merge tag 'x86_urgent_for_v5.16_rc1' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Borislav Petkov:

 - Add the model number of a new, Raptor Lake CPU, to intel-family.h

 - Do not log spurious corrected MCEs on SKL too, due to an erratum

 - Clarify the path of paravirt ops patches upstream

 - Add an optimization to avoid writing out AMX components to sigframes
   when former are in init state

* tag 'x86_urgent_for_v5.16_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/cpu: Add Raptor Lake to Intel family
  x86/mce: Add errata workaround for Skylake SKX37
  MAINTAINERS: Add some information to PARAVIRT_OPS entry
  x86/fpu: Optimize out sigframe xfeatures when in init state

3 years agoMerge tag 'perf-tools-for-v5.16-2021-11-13' of git://git.kernel.org/pub/scm/linux...
Linus Torvalds [Sun, 14 Nov 2021 17:25:01 +0000 (09:25 -0800)]
Merge tag 'perf-tools-for-v5.16-2021-11-13' of git://git./linux/kernel/git/acme/linux

Pull more perf tools updates from Arnaldo Carvalho de Melo:
 "Hardware tracing:

   - ARM:
      * Print the size of the buffer size consistently in hexadecimal in
        ARM Coresight.
      * Add Coresight snapshot mode support.
      * Update --switch-events docs in 'perf record'.
      * Support hardware-based PID tracing.
      * Track task context switch for cpu-mode events.

   - Vendor events:
      * Add metric events JSON file for power10 platform

  perf test:

   - Get 'perf test' unit tests closer to kunit.

   - Topology tests improvements.

   - Remove bashisms from some tests.

  perf bench:

   - Fix memory leak of perf_cpu_map__new() in the futex benchmarks.

  libbpf:

   - Add some more weak libbpf functions o allow building with the
     libbpf versions, old ones, present in distros.

  libbeauty:

   - Translate [gs]setsockopt 'level' argument integer values to
     strings.

  tools headers UAPI:

   - Sync futex_waitv, arch prctl, sound, i195_drm and msr-index files
     with the kernel sources.

  Documentation:

   - Add documentation to 'struct symbol'.

   - Synchronize the definition of enum perf_hw_id with code in
     tools/perf/design.txt"

* tag 'perf-tools-for-v5.16-2021-11-13' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux: (67 commits)
  perf tests: Remove bash constructs from stat_all_pmu.sh
  perf tests: Remove bash construct from record+zstd_comp_decomp.sh
  perf test: Remove bash construct from stat_bpf_counters.sh test
  perf bench futex: Fix memory leak of perf_cpu_map__new()
  tools arch x86: Sync the msr-index.h copy with the kernel sources
  tools headers UAPI: Sync drm/i915_drm.h with the kernel sources
  tools headers UAPI: Sync sound/asound.h with the kernel sources
  tools headers UAPI: Sync linux/prctl.h with the kernel sources
  tools headers UAPI: Sync arch prctl headers with the kernel sources
  perf tools: Add more weak libbpf functions
  perf bpf: Avoid memory leak from perf_env__insert_btf()
  perf symbols: Factor out annotation init/exit
  perf symbols: Bit pack to save a byte
  perf symbols: Add documentation to 'struct symbol'
  tools headers UAPI: Sync files changed by new futex_waitv syscall
  perf test bpf: Use ARRAY_CHECK() instead of ad-hoc equivalent, addressing array_size.cocci warning
  perf arm-spe: Support hardware-based PID tracing
  perf arm-spe: Save context ID in record
  perf arm-spe: Update --switch-events docs in 'perf record'
  perf arm-spe: Track task context switch for cpu-mode events
  ...

3 years agoMerge tag 'irqchip-fixes-5.16-1' of git://git.kernel.org/pub/scm/linux/kernel/git...
Thomas Gleixner [Sun, 14 Nov 2021 12:59:05 +0000 (13:59 +0100)]
Merge tag 'irqchip-fixes-5.16-1' of git://git./linux/kernel/git/maz/arm-platforms into irq/urgent

Pull irqchip fixes from Marc Zyngier:

  - Address an issue with the SiFive PLIC being unable to EOI
    a masked interrupt

  - Move the disable/enable methods in the CSky mpintc to
    mask/unmask

  - Fix a regression in the OF irq code where an interrupt-controller
    property in the same node as an interrupt-map property would get
    ignored

Link: https://lore.kernel.org/all/20211112173459.4015233-1-maz@kernel.org
3 years agoMerge tag 'zstd-for-linus-v5.16' of git://github.com/terrelln/linux
Linus Torvalds [Sat, 13 Nov 2021 23:32:30 +0000 (15:32 -0800)]
Merge tag 'zstd-for-linus-v5.16' of git://github.com/terrelln/linux

Pull zstd update from Nick Terrell:
 "Update to zstd-1.4.10.

  Add myself as the maintainer of zstd and update the zstd version in
  the kernel, which is now 4 years out of date, to a much more recent
  zstd release. This includes bug fixes, much more extensive fuzzing,
  and performance improvements. And generates the kernel zstd
  automatically from upstream zstd, so it is easier to keep the zstd
  verison up to date, and we don't fall so far out of date again.

  This includes 5 commits that update the zstd library version:

   - Adds a new kernel-style wrapper around zstd.

     This wrapper API is functionally equivalent to the subset of the
     current zstd API that is currently used. The wrapper API changes to
     be kernel style so that the symbols don't collide with zstd's
     symbols. The update to zstd-1.4.10 maintains the same API and
     preserves the semantics, so that none of the callers need to be
     updated. All callers are updated in the commit, because there are
     zero functional changes.

   - Adds an indirection for `lib/decompress_unzstd.c` so it doesn't
     depend on the layout of `lib/zstd/` to include every source file.
     This allows the next patch to be automatically generated.

   - Imports the zstd-1.4.10 source code. This commit is automatically
     generated from upstream zstd (https://github.com/facebook/zstd).

   - Adds me (terrelln@fb.com) as the maintainer of `lib/zstd`.

   - Fixes a newly added build warning for clang.

  The discussion around this patchset has been pretty long, so I've
  included a FAQ-style summary of the history of the patchset, and why
  we are taking this approach.

  Why do we need to update?
  -------------------------

  The zstd version in the kernel is based off of zstd-1.3.1, which is
  was released August 20, 2017. Since then zstd has seen many bug fixes
  and performance improvements. And, importantly, upstream zstd is
  continuously fuzzed by OSS-Fuzz, and bug fixes aren't backported to
  older versions. So the only way to sanely get these fixes is to keep
  up to date with upstream zstd.

  There are no known security issues that affect the kernel, but we need
  to be able to update in case there are. And while there are no known
  security issues, there are relevant bug fixes. For example the problem
  with large kernel decompression has been fixed upstream for over 2
  years [1]

  Additionally the performance improvements for kernel use cases are
  significant. Measured for x86_64 on my Intel i9-9900k @ 3.6 GHz:

   - BtrFS zstd compression at levels 1 and 3 is 5% faster

   - BtrFS zstd decompression+read is 15% faster

   - SquashFS zstd decompression+read is 15% faster

   - F2FS zstd compression+write at level 3 is 8% faster

   - F2FS zstd decompression+read is 20% faster

   - ZRAM decompression+read is 30% faster

   - Kernel zstd decompression is 35% faster

   - Initramfs zstd decompression+build is 5% faster

  On top of this, there are significant performance improvements coming
  down the line in the next zstd release, and the new automated update
  patch generation will allow us to pull them easily.

  How is the update patch generated?
  ----------------------------------

  The first two patches are preparation for updating the zstd version.
  Then the 3rd patch in the series imports upstream zstd into the
  kernel. This patch is automatically generated from upstream. A script
  makes the necessary changes and imports it into the kernel. The
  changes are:

   - Replace all libc dependencies with kernel replacements and rewrite
     includes.

   - Remove unncessary portability macros like: #if defined(_MSC_VER).

   - Use the kernel xxhash instead of bundling it.

  This automation gets tested every commit by upstream's continuous
  integration. When we cut a new zstd release, we will submit a patch to
  the kernel to update the zstd version in the kernel.

  The automated process makes it easy to keep the kernel version of zstd
  up to date. The current zstd in the kernel shares the guts of the
  code, but has a lot of API and minor changes to work in the kernel.
  This is because at the time upstream zstd was not ready to be used in
  the kernel envrionment as-is. But, since then upstream zstd has
  evolved to support being used in the kernel as-is.

  Why are we updating in one big patch?
  -------------------------------------

  The 3rd patch in the series is very large. This is because it is
  restructuring the code, so it both deletes the existing zstd, and
  re-adds the new structure. Future updates will be directly
  proportional to the changes in upstream zstd since the last import.
  They will admittidly be large, as zstd is an actively developed
  project, and has hundreds of commits between every release. However,
  there is no other great alternative.

  One option ruled out is to replay every upstream zstd commit. This is
  not feasible for several reasons:

   - There are over 3500 upstream commits since the zstd version in the
     kernel.

   - The automation to automatically generate the kernel update was only
     added recently, so older commits cannot easily be imported.

   - Not every upstream zstd commit builds.

   - Only zstd releases are "supported", and individual commits may have
     bugs that were fixed before a release.

  Another option to reduce the patch size would be to first reorganize
  to the new file structure, and then apply the patch. However, the
  current kernel zstd is formatted with clang-format to be more
  "kernel-like". But, the new method imports zstd as-is, without
  additional formatting, to allow for closer correlation with upstream,
  and easier debugging. So the patch wouldn't be any smaller.

  It also doesn't make sense to import upstream zstd commit by commit
  going forward. Upstream zstd doesn't support production use cases
  running of the development branch. We have a lot of post-commit
  fuzzing that catches many bugs, so indiviudal commits may be buggy,
  but fixed before a release. So going forward, I intend to import every
  (important) zstd release into the Kernel.

  So, while it isn't ideal, updating in one big patch is the only patch
  I see forward.

  Who is responsible for this code?
  ---------------------------------

  I am. This patchset adds me as the maintainer for zstd. Previously,
  there was no tree for zstd patches. Because of that, there were
  several patches that either got ignored, or took a long time to merge,
  since it wasn't clear which tree should pick them up. I'm officially
  stepping up as maintainer, and setting up my tree as the path through
  which zstd patches get merged. I'll make sure that patches to the
  kernel zstd get ported upstream, so they aren't erased when the next
  version update happens.

  How is this code tested?
  ------------------------

  I tested every caller of zstd on x86_64 (BtrFS, ZRAM, SquashFS, F2FS,
  Kernel, InitRAMFS). I also tested Kernel & InitRAMFS on i386 and
  aarch64. I checked both performance and correctness.

  Also, thanks to many people in the community who have tested these
  patches locally.

  Lastly, this code will bake in linux-next before being merged into
  v5.16.

  Why update to zstd-1.4.10 when zstd-1.5.0 has been released?
  ------------------------------------------------------------

  This patchset has been outstanding since 2020, and zstd-1.4.10 was the
  latest release when it was created. Since the update patch is
  automatically generated from upstream, I could generate it from
  zstd-1.5.0.

  However, there were some large stack usage regressions in zstd-1.5.0,
  and are only fixed in the latest development branch. And the latest
  development branch contains some new code that needs to bake in the
  fuzzer before I would feel comfortable releasing to the kernel.

  Once this patchset has been merged, and we've released zstd-1.5.1, we
  can update the kernel to zstd-1.5.1, and exercise the update process.

  You may notice that zstd-1.4.10 doesn't exist upstream. This release
  is an artifical release based off of zstd-1.4.9, with some fixes for
  the kernel backported from the development branch. I will tag the
  zstd-1.4.10 release after this patchset is merged, so the Linux Kernel
  is running a known version of zstd that can be debugged upstream.

  Why was a wrapper API added?
  ----------------------------

  The first versions of this patchset migrated the kernel to the
  upstream zstd API. It first added a shim API that supported the new
  upstream API with the old code, then updated callers to use the new
  shim API, then transitioned to the new code and deleted the shim API.
  However, Cristoph Hellwig suggested that we transition to a kernel
  style API, and hide zstd's upstream API behind that. This is because
  zstd's upstream API is supports many other use cases, and does not
  follow the kernel style guide, while the kernel API is focused on the
  kernel's use cases, and follows the kernel style guide.

  Where is the previous discussion?
  ---------------------------------

  Links for the discussions of the previous versions of the patch set
  below. The largest changes in the design of the patchset are driven by
  the discussions in v11, v5, and v1. Sorry for the mix of links, I
  couldn't find most of the the threads on lkml.org"

Link: https://lkml.org/lkml/2020/9/29/27
Link: https://www.spinics.net/lists/linux-crypto/msg58189.html
Link: https://lore.kernel.org/linux-btrfs/20210430013157.747152-1-nickrterrell@gmail.com/
Link: https://lore.kernel.org/lkml/20210426234621.870684-2-nickrterrell@gmail.com/
Link: https://lore.kernel.org/linux-btrfs/20210330225112.496213-1-nickrterrell@gmail.com/
Link: https://lore.kernel.org/linux-f2fs-devel/20210326191859.1542272-1-nickrterrell@gmail.com/
Link: https://lkml.org/lkml/2020/12/3/1195
Link: https://lkml.org/lkml/2020/12/2/1245
Link: https://lore.kernel.org/linux-btrfs/20200916034307.2092020-1-nickrterrell@gmail.com/
Link: https://www.spinics.net/lists/linux-btrfs/msg105783.html
Link: https://lkml.org/lkml/2020/9/23/1074
Link: https://www.spinics.net/lists/linux-btrfs/msg105505.html
Link: https://lore.kernel.org/linux-btrfs/20200916034307.2092020-1-nickrterrell@gmail.com/
Signed-off-by: Nick Terrell <terrelln@fb.com>
Tested By: Paul Jones <paul@pauljones.id.au>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com> # LLVM/Clang v13.0.0 on x86-64
Tested-by: Jean-Denis Girard <jd.girard@sysnux.pf>
* tag 'zstd-for-linus-v5.16' of git://github.com/terrelln/linux:
  lib: zstd: Add cast to silence clang's -Wbitwise-instead-of-logical
  MAINTAINERS: Add maintainer entry for zstd
  lib: zstd: Upgrade to latest upstream zstd version 1.4.10
  lib: zstd: Add decompress_sources.h for decompress_unzstd
  lib: zstd: Add kernel-specific API