[PATCH v2] pinctrl: samsung: fix missing GPIOLIB on ARM64 Exynos config

[Krzysztof Kozlowski]

The Samsung pinctrl drivers depend on OF_GPIO, which is part of GPIOLIB.
ARMv7 Exynos platform selects GPIOLIB and Samsung pinctrl drivers. ARMv8
Exynos selects only the latter leading to possible wrong configuration
on ARMv8 build:

  WARNING: unmet direct dependencies detected for PINCTRL_EXYNOS
    Depends on [n]: PINCTRL [=y] && OF_GPIO [=n] && (ARCH_EXYNOS [=y] || ARCH_S5PV210 || COMPILE_TEST [=y])
    Selected by [y]:
    - ARCH_EXYNOS [=y]

Always select the GPIOLIB from the Samsung pinctrl drivers to fix the
issue.  This requires removing of OF_GPIO dependency (to avoid recursive
dependency), so add dependency on OF for COMPILE_TEST cases.

Reported-by: Necip Fazil Yildiran <fazilyildiran at gmail.com>
Fixes: eed6b3eb20b9 ("arm64: Split out platform options to separate Kconfig")
Cc: <stable at vger.kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski at linaro.org>

---

Changes since v1:
1. Do not select OF_GPIO and add back dependency on OF (Arnd).

Original report:
https://bugzilla.kernel.org/show_bug.cgi?id=210047
---
 arch/arm/mach-exynos/Kconfig    |  1 -
 drivers/pinctrl/samsung/Kconfig | 11 ++++-------
 2 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index 51a336f349f4..4d3b40e4049a 100644
--- a/arch/arm/mach-exynos/Kconfig
+++ b/arch/arm/mach-exynos/Kconfig
@@ -16,7 +16,6 @@ menuconfig ARCH_EXYNOS
 	select EXYNOS_PMU
 	select EXYNOS_SROM
 	select EXYNOS_PM_DOMAINS if PM_GENERIC_DOMAINS
-	select GPIOLIB
 	select HAVE_ARM_ARCH_TIMER if ARCH_EXYNOS5
 	select HAVE_ARM_SCU if SMP
 	select PINCTRL
diff --git a/drivers/pinctrl/samsung/Kconfig b/drivers/pinctrl/samsung/Kconfig
index dfd805e76862..7b0576f71376 100644
--- a/drivers/pinctrl/samsung/Kconfig
+++ b/drivers/pinctrl/samsung/Kconfig
@@ -4,14 +4,13 @@
 #
 config PINCTRL_SAMSUNG
 	bool
-	depends on OF_GPIO
+	select GPIOLIB
 	select PINMUX
 	select PINCONF
 
 config PINCTRL_EXYNOS
 	bool "Pinctrl common driver part for Samsung Exynos SoCs"
-	depends on OF_GPIO
-	depends on ARCH_EXYNOS || ARCH_S5PV210 || COMPILE_TEST
+	depends on ARCH_EXYNOS || ARCH_S5PV210 || (COMPILE_TEST && OF)
 	select PINCTRL_SAMSUNG
 	select PINCTRL_EXYNOS_ARM if ARM && (ARCH_EXYNOS || ARCH_S5PV210)
 	select PINCTRL_EXYNOS_ARM64 if ARM64 && ARCH_EXYNOS
@@ -26,12 +25,10 @@ config PINCTRL_EXYNOS_ARM64
 
 config PINCTRL_S3C24XX
 	bool "Samsung S3C24XX SoC pinctrl driver"
-	depends on OF_GPIO
-	depends on ARCH_S3C24XX || COMPILE_TEST
+	depends on ARCH_S3C24XX || (COMPILE_TEST && OF)
 	select PINCTRL_SAMSUNG
 
 config PINCTRL_S3C64XX
 	bool "Samsung S3C64XX SoC pinctrl driver"
-	depends on OF_GPIO
-	depends on ARCH_S3C64XX || COMPILE_TEST
+	depends on ARCH_S3C64XX || (COMPILE_TEST && OF)
 	select PINCTRL_SAMSUNG
-- 
2.32.0