On Thu, Feb 12, 2015 at 04:00:11PM +0800, Chen-Yu Tsai wrote:
> From: Arnd Bergmann <arnd@xxxxxxxx>
>
> The sun4i-ts driver has had a dependency on the thermal code
> with the addition of the thermal zone sensor support, but this
> is not currently enforced in Kconfig, so with TOUCHSCREEN_SUN4I=y,
> THERMAL=m and THERMAL_OF=y we get
>
> drivers/built-in.o: In function `sun4i_ts_remove':
> :(.text+0x2376f4): undefined reference to `thermal_zone_of_sensor_unregister'
> drivers/built-in.o: In function `sun4i_ts_probe':
> :(.text+0x237a94): undefined reference to `thermal_zone_of_sensor_register'
> :(.text+0x237c00): undefined reference to `thermal_zone_of_sensor_unregister'
>
> We need the dependency on THERMAL in order to ensure that this
> driver becomes a loadable module if the thermal support itself
> is modular, while the dependency on THERMAL_OF is a runtime
> dependency and the driver will still build if it is missing.
> It is entirely possible to build sun4i-ts without THERMAL_OF
> just to use the hwmon sensors and/or touchscreen.
>
> Fixes: 223697107949 ("Input: sun4i-ts - add thermal zone sensor support")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> [wens@xxxxxxxx: Fix description and Kconfig dependencies]
> Signed-off-by: Chen-Yu Tsai <wens@xxxxxxxx>
Applied, thank you.
> ---
>
> v2 updates the Kconfig dependencies as Dmitry pointed out, and makes
> the description be more specific on the failing config and why a
> dependency on THERMAL_OF is not required. The failing commit hash
> is also updated.
>
> ---
> drivers/input/touchscreen/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
> index 58917525126e..6261fd6d7c3c 100644
> --- a/drivers/input/touchscreen/Kconfig
> +++ b/drivers/input/touchscreen/Kconfig
> @@ -943,6 +943,7 @@ config TOUCHSCREEN_SUN4I
> tristate "Allwinner sun4i resistive touchscreen controller support"
> depends on ARCH_SUNXI || COMPILE_TEST
> depends on HWMON
> + depends on THERMAL || !THERMAL_OF
> help
> This selects support for the resistive touchscreen controller
> found on Allwinner sunxi SoCs.
> --
> 2.1.4
>
--
Dmitry
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