From 9c62e2282900332c8b711d9f9e37af369a8ef71b Mon Sep 17 00:00:00 2001 From: Tim Harvey Date: Fri, 18 Jul 2025 13:02:59 -0700 Subject: [PATCH] hwmon: (gsc-hwmon) fix fan pwm setpoint show functions The Linux hwmon sysfs API values for pwmX_auto_pointY_pwm represent an integer value between 0 (0%) to 255 (100%) and the pwmX_auto_pointY_temp represent millidegrees Celcius. Commit a6d80df47ee2 ("hwmon: (gsc-hwmon) fix fan pwm temperature scaling") properly addressed the incorrect scaling in the pwm_auto_point_temp_store implementation but erroneously scaled the pwm_auto_point_pwm_show (pwm value) instead of the pwm_auto_point_temp_show (temp value) resulting in: # cat /sys/class/hwmon/hwmon0/pwm1_auto_point6_pwm 25500 # cat /sys/class/hwmon/hwmon0/pwm1_auto_point6_temp 4500 Fix the scaling of these attributes: # cat /sys/class/hwmon/hwmon0/pwm1_auto_point6_pwm 255 # cat /sys/class/hwmon/hwmon0/pwm1_auto_point6_temp 45000 Fixes: a6d80df47ee2 ("hwmon: (gsc-hwmon) fix fan pwm temperature scaling") Cc: stable@vger.kernel.org Signed-off-by: Tim Harvey Link: https://lore.kernel.org/r/20250718200259.1840792-1-tharvey@gateworks.com Signed-off-by: Guenter Roeck --- drivers/hwmon/gsc-hwmon.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/hwmon/gsc-hwmon.c b/drivers/hwmon/gsc-hwmon.c index 0f9af82cebec2..105b9f9dbec3d 100644 --- a/drivers/hwmon/gsc-hwmon.c +++ b/drivers/hwmon/gsc-hwmon.c @@ -64,7 +64,7 @@ static ssize_t pwm_auto_point_temp_show(struct device *dev, return ret; ret = regs[0] | regs[1] << 8; - return sprintf(buf, "%d\n", ret * 10); + return sprintf(buf, "%d\n", ret * 100); } static ssize_t pwm_auto_point_temp_store(struct device *dev, @@ -99,7 +99,7 @@ static ssize_t pwm_auto_point_pwm_show(struct device *dev, { struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); - return sprintf(buf, "%d\n", 255 * (50 + (attr->index * 10))); + return sprintf(buf, "%d\n", 255 * (50 + (attr->index * 10)) / 100); } static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point1_pwm, pwm_auto_point_pwm, 0); -- 2.47.2