platform/x86: uniwill-laptop: Accept charging threshold of 0

The power supply sysfs ABI states that:

	Not all hardware is capable of setting this to an arbitrary
	percentage. Drivers will round written values to the nearest
	supported value. Reading back the value will show the actual
	threshold set by the driver.

The driver currently violates this ABI by rejecting a charging
threshold of 0. Fix this by clamping this value to 1.

Fixes: d050479693bb ("platform/x86: Add Uniwill laptop driver")
Reviewed-by: Werner Sembach <wse@tuxedocomputers.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://patch.msgid.link/20260512232145.329260-3-W_Armin@gmx.de
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

diff --git a/drivers/platform/x86/uniwill/uniwill-acpi.c b/drivers/platform/x86/uniwill/uniwill-acpi.c
index d9c202fc8c7127a3df488908370e898197063e23..1f9e9f61d387adc98ccee8df1d88d27b7b69b213 100644 (file)
--- a/drivers/platform/x86/uniwill/uniwill-acpi.c
+++ b/drivers/platform/x86/uniwill/uniwill-acpi.c
@@ -1431,11 +1431,11 @@ static int uniwill_set_property(struct power_supply *psy, const struct power_sup
 
        switch (psp) {
        case POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD:
-               if (val->intval < 1 || val->intval > 100)
+               if (val->intval < 0 || val->intval > 100)
                        return -EINVAL;
 
                return regmap_update_bits(data->regmap, EC_ADDR_CHARGE_CTRL, CHARGE_CTRL_MASK,
-                                         val->intval);
+                                         max(val->intval, 1));
        default:
                return -EINVAL;
        }