soc: samsung: exynos-chipid: convert to a module

Exynos ChipID and ASV (Adaptive Supply Voltage) driver is not essential
to system boot and it can successfully be built and loaded as module.

This makes core kernel image smaller and reduces the memory footprint
when multi-platform kernel is booted on non-Exynos board.  Usually it is
also distro-friendly.

Add multiple authors of the driver since its conversion from
mach-exynos, ordered alphabetically by first name.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Sylwester Nawrocki <snawrocki@kernel.org>
Tested-by: Sylwester Nawrocki <snawrocki@kernel.org>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Tested-by: Alim Akhtar <alim.akhtar@samsung.com>
Link: https://lore.kernel.org/r/20210919093114.35987-3-krzysztof.kozlowski@canonical.com

diff --git a/drivers/soc/samsung/Kconfig b/drivers/soc/samsung/Kconfig
index 1f643c0f5c93f0ad033553f15e9af13f33a275a3..fe139f26d093c5ca69a83ea1ebefe3002a02e751 100644 (file)
--- a/drivers/soc/samsung/Kconfig
+++ b/drivers/soc/samsung/Kconfig
@@ -13,13 +13,14 @@ config EXYNOS_ASV_ARM
        depends on EXYNOS_CHIPID
 
 config EXYNOS_CHIPID
-       bool "Exynos ChipID controller and ASV driver" if COMPILE_TEST
+       tristate "Exynos ChipID controller and ASV driver" if COMPILE_TEST
        depends on ARCH_EXYNOS || COMPILE_TEST
        select EXYNOS_ASV_ARM if ARM && ARCH_EXYNOS
        select MFD_SYSCON
        select SOC_BUS
        help
          Support for Samsung Exynos SoC ChipID and Adaptive Supply Voltage.
+         This driver can also be built as module (exynos_chipid).
 
 config EXYNOS_PMU
        bool "Exynos PMU controller driver" if COMPILE_TEST

diff --git a/drivers/soc/samsung/Makefile b/drivers/soc/samsung/Makefile
index 0c523a8de4ebffb7feabf94ca8e1eb78a137c3b6..2ae4bea804cf0a47f2bd45904261f50fcbc9acd5 100644 (file)
--- a/drivers/soc/samsung/Makefile
+++ b/drivers/soc/samsung/Makefile
@@ -1,8 +1,9 @@
 # SPDX-License-Identifier: GPL-2.0
 
 obj-$(CONFIG_EXYNOS_ASV_ARM)   += exynos5422-asv.o
+obj-$(CONFIG_EXYNOS_CHIPID)    += exynos_chipid.o
+exynos_chipid-y                        += exynos-chipid.o exynos-asv.o
 
-obj-$(CONFIG_EXYNOS_CHIPID)    += exynos-chipid.o exynos-asv.o
 obj-$(CONFIG_EXYNOS_PMU)       += exynos-pmu.o
 
 obj-$(CONFIG_EXYNOS_PMU_ARM_DRIVERS)   += exynos3250-pmu.o exynos4-pmu.o \

diff --git a/drivers/soc/samsung/exynos-chipid.c b/drivers/soc/samsung/exynos-chipid.c
index dcd9a08ce70659cbcfec40cff13b3d923e8744fe..b2627a3a127ad430d2f0704657f1f0ace1a90609 100644 (file)
--- a/drivers/soc/samsung/exynos-chipid.c
+++ b/drivers/soc/samsung/exynos-chipid.c
@@ -15,6 +15,7 @@
 #include <linux/device.h>
 #include <linux/errno.h>
 #include <linux/mfd/syscon.h>
+#include <linux/module.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
@@ -128,6 +129,7 @@ static const struct of_device_id exynos_chipid_of_device_ids[] = {
        { .compatible = "samsung,exynos4210-chipid" },
        {}
 };
+MODULE_DEVICE_TABLE(of, exynos_chipid_of_device_ids);
 
 static struct platform_driver exynos_chipid_driver = {
        .driver = {
@@ -137,4 +139,11 @@ static struct platform_driver exynos_chipid_driver = {
        .probe  = exynos_chipid_probe,
        .remove = exynos_chipid_remove,
 };
-builtin_platform_driver(exynos_chipid_driver);
+module_platform_driver(exynos_chipid_driver);
+
+MODULE_DESCRIPTION("Samsung Exynos ChipID controller and ASV driver");
+MODULE_AUTHOR("Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>");
+MODULE_AUTHOR("Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>");
+MODULE_AUTHOR("Pankaj Dubey <pankaj.dubey@samsung.com>");
+MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
+MODULE_LICENSE("GPL");

diff --git a/drivers/soc/samsung/exynos5422-asv.c b/drivers/soc/samsung/exynos5422-asv.c
index ca409a976e34ca7d3fbaa464ab11267cb9433aaa..475ae52765291493c65e5b546b20b91c627138ed 100644 (file)
--- a/drivers/soc/samsung/exynos5422-asv.c
+++ b/drivers/soc/samsung/exynos5422-asv.c
@@ -503,3 +503,4 @@ int exynos5422_asv_init(struct exynos_asv *asv)
 
        return 0;
 }
+EXPORT_SYMBOL_GPL(exynos5422_asv_init);