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Subject: Re: [PATCH] mfd: Fix I2C_DESIGNWARE_PLATFORM dependencies
To:     Jarkko Nikula <jarkko.nikula@linux.intel.com>,
        linux-kernel@vger.kernel.org
Cc:     Lee Jones <lee.jones@linaro.org>,
        Hans de Goede <hdegoede@redhat.com>,
        Rajmohan Mani <rajmohan.mani@intel.com>,
        linux-i2c@vger.kernel.org, Stable <stable@vger.kernel.org>
References: <20190121141128.5283-1-jarkko.nikula@linux.intel.com>
From:   Randy Dunlap <rdunlap@infradead.org>
Message-ID: <05a36e0c-3b26-c3dd-9f9e-c3e152b0a2a3@infradead.org>
Date:   Mon, 21 Jan 2019 14:35:48 -0800
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On 1/21/19 6:11 AM, Jarkko Nikula wrote:
> INTEL_SOC_PMIC, INTEL_SOC_PMIC_CHTWC and MFD_TPS68470 select the
> I2C_DESIGNWARE_PLATFORM without its dependencies making it possible to see
> warning and build error like below:
> 
> WARNING: unmet direct dependencies detected for I2C_DESIGNWARE_PLATFORM
>   Depends on [n]: I2C [=y] && HAS_IOMEM [=y] && (ACPI [=y] && COMMON_CLK [=n] || !ACPI [=y])
>   Selected by [y]:
>   - MFD_TPS68470 [=y] && HAS_IOMEM [=y] && ACPI [=y] && I2C [=y]=y
> 
> /usr/bin/ld: drivers/i2c/busses/i2c-designware-platdrv.o: in function `dw_i2c_plat_resume':
> i2c-designware-platdrv.c:(.text+0x62): undefined reference to `i2c_dw_prepare_clk'
> /usr/bin/ld: drivers/i2c/busses/i2c-designware-platdrv.o: in function `dw_i2c_plat_suspend':
> i2c-designware-platdrv.c:(.text+0x9a): undefined reference to `i2c_dw_prepare_clk'
> /usr/bin/ld: drivers/i2c/busses/i2c-designware-platdrv.o: in function `dw_i2c_plat_probe':
> i2c-designware-platdrv.c:(.text+0x41c): undefined reference to `i2c_dw_prepare_clk'
> /usr/bin/ld: i2c-designware-platdrv.c:(.text+0x438): undefined reference to `i2c_dw_read_comp_param'
> /usr/bin/ld: i2c-designware-platdrv.c:(.text+0x545): undefined reference to `i2c_dw_probe'
> /usr/bin/ld: i2c-designware-platdrv.c:(.text+0x727): undefined reference to `i2c_dw_probe_slave'
> 
> Fix this by making above options to depend on I2C_DESIGNWARE_PLATFORM
> being built-in. I2C_DESIGNWARE_PLATFORM is a visible symbol with
> dependencies so in general the select should be avoided.
> 
> Reported-by: Randy Dunlap <rdunlap@infradead.org>
> Fixes: acebcff9eda8 ("mfd: intel_soc_pmic: Select designware i2c-bus driver")
> Fixes: de85d79f4aab ("mfd: Add Cherry Trail Whiskey Cove PMIC driver")
> Fixes: 9bbf6a15ce19 ("mfd: Add support for TPS68470 device")
> Cc: Stable <stable@vger.kernel.org> # v4.14+
> Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>

Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested

Thanks.

> ---
>  drivers/mfd/Kconfig | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index f461460a2aeb..6a84a8ecd4a9 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -519,10 +519,10 @@ config INTEL_SOC_PMIC
>  	bool "Support for Crystal Cove PMIC"
>  	depends on ACPI && HAS_IOMEM && I2C=y && GPIOLIB && COMMON_CLK
>  	depends on X86 || COMPILE_TEST
> +	depends on I2C_DESIGNWARE_PLATFORM=y
>  	select MFD_CORE
>  	select REGMAP_I2C
>  	select REGMAP_IRQ
> -	select I2C_DESIGNWARE_PLATFORM
>  	help
>  	  Select this option to enable support for Crystal Cove PMIC
>  	  on some Intel SoC systems. The PMIC provides ADC, GPIO,
> @@ -548,10 +548,10 @@ config INTEL_SOC_PMIC_CHTWC
>  	bool "Support for Intel Cherry Trail Whiskey Cove PMIC"
>  	depends on ACPI && HAS_IOMEM && I2C=y && COMMON_CLK
>  	depends on X86 || COMPILE_TEST
> +	depends on I2C_DESIGNWARE_PLATFORM=y
>  	select MFD_CORE
>  	select REGMAP_I2C
>  	select REGMAP_IRQ
> -	select I2C_DESIGNWARE_PLATFORM
>  	help
>  	  Select this option to enable support for the Intel Cherry Trail
>  	  Whiskey Cove PMIC found on some Intel Cherry Trail systems.
> @@ -1420,9 +1420,9 @@ config MFD_TPS65217
>  config MFD_TPS68470
>  	bool "TI TPS68470 Power Management / LED chips"
>  	depends on ACPI && I2C=y
> +	depends on I2C_DESIGNWARE_PLATFORM=y
>  	select MFD_CORE
>  	select REGMAP_I2C
> -	select I2C_DESIGNWARE_PLATFORM
>  	help
>  	  If you say yes here you get support for the TPS68470 series of
>  	  Power Management / LED chips.
> 


-- 
~Randy