linux-kernel - Re: [PATCH v2 1/2] mfd: intel_soc_pmic: use 'depends on' instead of 'select'

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Message-ID: <20170615134754.bphyw7xydtacrdgw@dell>
Date:   Thu, 15 Jun 2017 14:47:54 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH v2 1/2] mfd: intel_soc_pmic: use 'depends on' instead of
 'select'

On Thu, 15 Jun 2017, Hans de Goede wrote:

> 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: 5f125f1f5705 ("mfd: intel_soc_pmic: Select designware i2c-bus 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 | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)

Applied, thanks.

> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 95e868360e9a..2499f8b5135a 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -453,14 +453,12 @@ config LPC_SCH
>  
>  config INTEL_SOC_PMIC
>  	bool "Support for Crystal Cove PMIC"
> -	depends on HAS_IOMEM
> -	select GPIOLIB
> -	select I2C
> +	depends on HAS_IOMEM && I2C=y && GPIOLIB && COMMON_CLK
> +	depends on X86 || COMPILE_TEST
>  	select MFD_CORE
>  	select REGMAP_I2C
>  	select REGMAP_IRQ
> -	select COMMON_CLK
> -	select I2C_DESIGNWARE_PLATFORM
> +	select I2C_DESIGNWARE_PLATFORM if ACPI
>  	help
>  	  Select this option to enable support for Crystal Cove PMIC
>  	  on some Intel SoC systems. The PMIC provides ADC, GPIO,

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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