ARM: dts: at91: sama5d2_xplained: Add QSPI0 + SPI NOR memory nodes

This patch enables the QSPI0 controller, configures its pin muxing and
declares a jedec,spi-nor memory.

sama5d2 Xplained RevB and RevC use the Macronix MX25L25673G flash
memory which advertises a maximum frequency of 80MHz for Quad IO
Fast Read. Set the spi-max-frequency to 80MHz knowing that actually
the QSPI drver will set the SPI bus clock to 166MHz / 3 = 55.3MHz.

Signed-off-by: Cyrille Pitchen <cyrille.pitchen@microchip.com>
Tested-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20200403061222.1277147-3-tudor.ambarus@microchip.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

diff --git a/arch/arm/boot/dts/at91-sama5d2_xplained.dts b/arch/arm/boot/dts/at91-sama5d2_xplained.dts
index 055ee53e4773e5842a393ce45eb4c355dfb7bed7..e0c6cff1a31245ebcd98f208b676488fc4b804e3 100644 (file)
--- a/arch/arm/boot/dts/at91-sama5d2_xplained.dts
+++ b/arch/arm/boot/dts/at91-sama5d2_xplained.dts
@@ -72,6 +72,58 @@
                };
 
                apb {
+                       qspi0: spi@f0020000 {
+                               pinctrl-names = "default";
+                               pinctrl-0 = <&pinctrl_qspi0_default>;
+                               status = "disabled"; /* conflict with sdmmc1 */
+
+                               flash@0 {
+                                       #address-cells = <1>;
+                                       #size-cells = <1>;
+                                       compatible = "jedec,spi-nor";
+                                       reg = <0>;
+                                       spi-max-frequency = <80000000>;
+                                       spi-tx-bus-width = <4>;
+                                       spi-rx-bus-width = <4>;
+                                       m25p,fast-read;
+
+                                       at91bootstrap@00000000 {
+                                               label = "at91bootstrap";
+                                               reg = <0x00000000 0x00040000>;
+                                       };
+
+                                       bootloader@00040000 {
+                                               label = "bootloader";
+                                               reg = <0x00040000 0x000c0000>;
+                                       };
+
+                                       bootloaderenvred@00100000 {
+                                               label = "bootloader env redundant";
+                                               reg = <0x00100000 0x00040000>;
+                                       };
+
+                                       bootloaderenv@00140000 {
+                                               label = "bootloader env";
+                                               reg = <0x00140000 0x00040000>;
+                                       };
+
+                                       dtb@00180000 {
+                                               label = "device tree";
+                                               reg = <0x00180000 0x00080000>;
+                                       };
+
+                                       kernel@00200000 {
+                                               label = "kernel";
+                                               reg = <0x00200000 0x00600000>;
+                                       };
+
+                                       misc@00800000 {
+                                               label = "misc";
+                                               reg = <0x00800000 0x00000000>;
+                                       };
+                               };
+                       };
+
                        spi0: spi@f8000000 {
                                pinctrl-names = "default";
                                pinctrl-0 = <&pinctrl_spi0_default>;
@@ -535,6 +587,22 @@
                                        bias-disable;
                                };
 
+                               pinctrl_qspi0_default: qspi0_default {
+                                       sck_cs {
+                                               pinmux = <PIN_PA22__QSPI0_SCK>,
+                                                        <PIN_PA23__QSPI0_CS>;
+                                               bias-disable;
+                                       };
+
+                                       data {
+                                               pinmux = <PIN_PA24__QSPI0_IO0>,
+                                                        <PIN_PA25__QSPI0_IO1>,
+                                                        <PIN_PA26__QSPI0_IO2>,
+                                                        <PIN_PA27__QSPI0_IO3>;
+                                               bias-pull-up;
+                                       };
+                               };
+
                                pinctrl_sdmmc0_default: sdmmc0_default {
                                        cmd_data {
                                                pinmux = <PIN_PA1__SDMMC0_CMD>,