On Wed, Oct 31, 2018 at 5:55 PM Nathan Chancellor
<natechancellor@xxxxxxxxx> wrote:
>
> Clang warns when one enumerated type is implicitly converted to another:
>
> drivers/rtc/rtc-omap.c:574:21: warning: implicit conversion from
> enumeration type 'enum rtc_pin_config_param' to different enumeration
> type 'enum pin_config_param' [-Wenum-conversion]
> {"ti,active-high", PIN_CONFIG_ACTIVE_HIGH, 0},
> ~ ^~~~~~~~~~~~~~~~~~~~~~
> drivers/rtc/rtc-omap.c:579:12: warning: implicit conversion from
> enumeration type 'enum rtc_pin_config_param' to different enumeration
> type 'enum pin_config_param' [-Wenum-conversion]
> PCONFDUMP(PIN_CONFIG_ACTIVE_HIGH, "input active high", NULL, false),
> ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ./include/linux/pinctrl/pinconf-generic.h:163:11: note: expanded from
> macro 'PCONFDUMP'
> .param = a, .display = b, .format = c, .has_arg = d \
> ^
> 2 warnings generated.
>
> It is expected that pinctrl drivers can extend pin_config_param because
> of the gap between PIN_CONFIG_END and PIN_CONFIG_MAX so this conversion
> isn't an issue. Most drivers that take advantage of this define the
> PIN_CONFIG variables as constants, rather than enumerated values. Do the
> same thing here so that Clang no longer warns.
>
> Link: https://github.com/ClangBuiltLinux/linux/issues/144
> Signed-off-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
> ---
> drivers/rtc/rtc-omap.c | 4 +---
> 1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
> index 320b4a520eb3..bbff0e2deb84 100644
> --- a/drivers/rtc/rtc-omap.c
> +++ b/drivers/rtc/rtc-omap.c
> @@ -566,9 +566,7 @@ static const struct pinctrl_ops rtc_pinctrl_ops = {
> .dt_free_map = pinconf_generic_dt_free_map,
> };
>
> -enum rtc_pin_config_param {
> - PIN_CONFIG_ACTIVE_HIGH = PIN_CONFIG_END + 1,
> -};
> +#define PIN_CONFIG_ACTIVE_HIGH (PIN_CONFIG_END + 1)
>
> static const struct pinconf_generic_params rtc_params[] = {
> {"ti,active-high", PIN_CONFIG_ACTIVE_HIGH, 0},
> --
> 2.19.1
>
Bumping for review
--
Thanks,
~Nick Desaulniers
