linux-kernel - [PATCH 2/2] soc: samsung: exynos-chipid: convert to a module

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Message-Id: <20210917175134.252882-3-krzysztof.kozlowski@canonical.com>
Date:   Fri, 17 Sep 2021 19:51:34 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org
Cc:     Marek Szyprowski <m.szyprowski@...sung.com>,
        Sylwester Nawrocki <snawrocki@...nel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Pankaj Dubey <pankaj.dubey@...sung.com>
Subject: [PATCH 2/2] 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@...onical.com>
---
 drivers/soc/samsung/Kconfig          |  3 ++-
 drivers/soc/samsung/Makefile         |  3 ++-
 drivers/soc/samsung/exynos-chipid.c  | 11 ++++++++++-
 drivers/soc/samsung/exynos5422-asv.c |  1 +
 4 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/drivers/soc/samsung/Kconfig b/drivers/soc/samsung/Kconfig
index 1f643c0f5c93..fe139f26d093 100644
--- 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 0c523a8de4eb..2ae4bea804cf 100644
--- 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 5c1d0f97f766..5e8c957231ff 100644
--- 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>
@@ -129,6 +130,7 @@ 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 = {
@@ -138,4 +140,11 @@ 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@...sung.com>");
+MODULE_AUTHOR("Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>");
+MODULE_AUTHOR("Pankaj Dubey <pankaj.dubey@...sung.com>");
+MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@...sung.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/soc/samsung/exynos5422-asv.c b/drivers/soc/samsung/exynos5422-asv.c
index ca409a976e34..475ae5276529 100644
--- 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);
-- 
2.30.2