On Wed, 27 Apr 2016, Arnd Bergmann wrote:
> The MFD_VEXPRESS_SYSREG driver selects CLKSRC_MMIO, which in turn
> conflicts with ARCH_USES_GETTIMEOFFSET, causing a harmless Kconfig
> warning when it is set:
>
> warning: (ARCH_MVEBU && ARCH_DIGICOLOR && ARCH_GEMINI && ARCH_KEYSTONE &&
> ARCH_MOXART && ARCH_MXS && PLAT_SPEAR && ARCH_SUNXI && ARCH_TEGRA &&
> ARCH_U300 && PLAT_ORION && ARCH_CLPS711X && ARCH_EP93XX && ARCH_NETX &&
> ARCH_IXP4XX && ARCH_KS8695 && ARCH_W90X900 && ARCH_PXA && ARCH_SA1100 &&
> ARCH_OMAP1 && ARCH_BCM_IPROC && ARCH_INTEGRATOR_AP && ARCH_OMAP2PLUS &&
> MFD_VEXPRESS_SYSREG) selects CLKSRC_MMIO which has unmet direct dependencies
> (!ARCH_USES_GETTIMEOFFSET)
>
> This was apparently hidden by the fact that no ARM platform that
> still sets ARCH_USES_GETTIMEOFFSET has gpiolib support, and we
> already have a dependency on GPIOLIB that I added a while ago.
>
> However, after 296ad4acb8ef ("gpio: remove deps on
> ARCH_[WANT_OPTIONAL|REQUIRE]_GPIOLIB"), any platform can enable
> CONFIG_GPIOLIB, and that lets us enable MFD_VEXPRESS_SYSREG
> as well.
>
> This adds an explicit dependency on !ARCH_USES_GETTIMEOFFSET
> to guarantee that we can enable the CLKSRC_MMIO driver without
> getting warnings.
>
> Signed-off-by: Arnd Bergmann <a...@arndb.de>
> ---
> drivers/mfd/Kconfig | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Applied, thanks.
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 4b6d60f65429..461c0c4ff8d8 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -1569,7 +1569,7 @@ endmenu
>
> config MFD_VEXPRESS_SYSREG
> bool "Versatile Express System Registers"
> - depends on VEXPRESS_CONFIG && GPIOLIB
> + depends on VEXPRESS_CONFIG && GPIOLIB && !ARCH_USES_GETTIMEOFFSET
> default y
> select CLKSRC_MMIO
> select GPIO_GENERIC_PLATFORM
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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