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 <mirq-li...@rere.qmqm.pl>
---
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
---
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
