linux-kernel - [PATCH v2 2/2] mfd: intel_soc_pmic_chtwc: use 'depends on' instead of 'select'

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Date:   Thu, 15 Jun 2017 15:07:32 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     Hans de Goede <hdegoede@...hat.com>, linux-kernel@...r.kernel.org,
        Arnd Bergmann <arnd@...db.de>
Subject: [PATCH v2 2/2] mfd: intel_soc_pmic_chtwc: use 'depends on' instead of 'select'

From: Arnd Bergmann <arnd@...db.de>

I ran into a build error on ARM with a platform that has a non-standard
clk implementation:

drivers/clk/clk.o: In function `clk_disable':
clk.c:(.text.clk_disable+0x0): multiple definition of `clk_disable'
arch/arm/mach-omap1/clock.o:clock.c:(.text.clk_disable+0x0): first defined here
drivers/clk/clk.o: In function `clk_enable':
clk.c:(.text.clk_enable+0x0): multiple definition of `clk_enable'
arch/arm/mach-omap1/clock.o:clock.c:(.text.clk_enable+0x0): first defined here

The problem is a device driver that uses 'select COMMON_CLK', which is
generally a bad idea: selecting a subsystem should only be done from
a platform, otherwise we run into circular dependencies. The same driver
also selects 'GPIOLIB' and 'I2C', which has a similar effect.

This turns all three into 'depends on', as it should be.

Finally, we can limit the build to x86, unless we are compile testing.

Fixes: 2f91ded5f8f4 ("mfd: Add Cherry Trail Whiskey Cove PMIC driver")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
Signed-off-by: Hans de Goede <hdegoede@...hat.com>
---
Changes in v2:
-Split into 2 seperate patches for config INTEL_SOC_PMIC and
 config INTEL_SOC_PMIC_CHTWC
---
 drivers/mfd/Kconfig | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 2499f8b5135a..1428814c33f9 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -481,13 +481,12 @@ config INTEL_SOC_PMIC_BXTWC
 	  on these systems.
 
 config INTEL_SOC_PMIC_CHTWC
-	bool "Support for Intel Cherry Trail Whiskey Cove PMIC"
-	depends on ACPI && HAS_IOMEM
+	tristate "Support for Intel Cherry Trail Whiskey Cove PMIC"
+	depends on ACPI && HAS_IOMEM && I2C=y && COMMON_CLK
+	depends on X86 || COMPILE_TEST
 	select MFD_CORE
-	select I2C
 	select REGMAP_I2C
 	select REGMAP_IRQ
-	select COMMON_CLK
 	select I2C_DESIGNWARE_PLATFORM
 	help
 	  Select this option to enable support for the Intel Cherry Trail
-- 
2.13.0