Hi,
On Fri, May 01, 2020 at 05:11:18PM +0200, Michał Mirosław wrote:
> Rework power_supply_hwmon_read_string() to check it's parameters.
> This allows to extend it later with labels for other types of
> measurements.
>
> Signed-off-by: Michał Mirosław
> ---
> v2: split from fix temperature labels
> v3: remove power_supply_hwmon_read_string() parameter checks
> as it is internal API (suggested by Guenter Roeck)
> v4: remove unreachable() as it triggers compiler bugs
> ---
Thanks, queued.
-- Sebastian
> drivers/power/supply/power_supply_hwmon.c | 20 +++-
> 1 file changed, 19 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/power/supply/power_supply_hwmon.c
> b/drivers/power/supply/power_supply_hwmon.c
> index af72e5693f65..f5d538485aaa 100644
> --- a/drivers/power/supply/power_supply_hwmon.c
> +++ b/drivers/power/supply/power_supply_hwmon.c
> @@ -13,6 +13,11 @@ struct power_supply_hwmon {
> unsigned long *props;
> };
>
> +static const char *const ps_temp_label[] = {
> + "temp",
> + "ambient temp",
> +};
> +
> static int power_supply_hwmon_in_to_property(u32 attr)
> {
> switch (attr) {
> @@ -180,7 +185,20 @@ static int power_supply_hwmon_read_string(struct device
> *dev,
> u32 attr, int channel,
> const char **str)
> {
> - *str = channel ? "temp ambient" : "temp";
> + switch (type) {
> + case hwmon_temp:
> + *str = ps_temp_label[channel];
> + break;
> + default:
> + /* unreachable, but see:
> + * gcc bug #51513 [1] and clang bug #978 [2]
> + *
> + * [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51513
> + * [2] https://github.com/ClangBuiltLinux/linux/issues/978
> + */
> + break;
> + }
> +
> return 0;
> }
>
> --
> 2.20.1
>
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