Provide detail on the currently exposed hwmon interfaces for temperature, power, voltage, and fan. v2: add power cap documentation Signed-off-by: Alex Deucher <alexander.deucher at amd.com> --- drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 38 ++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c index e6e365852f11..c8a8c866e8c9 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c @@ -1109,6 +1109,44 @@ static ssize_t amdgpu_hwmon_set_power_cap(struct device *dev, return count; } + +/** + * DOC: hwmon + * + * The amdgpu driver exposes the following sensor interfaces: + * - GPU temperature (via the on-die sensor) + * - GPU voltage + * - Northbridge voltage (APUs only) + * - GPU power + * - GPU fan + * + * hwmon interfaces for GPU temperature: + * - temp1_input: the on die GPU temperature in millidegrees Celsius + * - temp1_crit: temperature critical max value in millidegrees Celsius + * - temp1_crit_hyst: temperature hysteresis for critical limit in millidegrees Celsius + * + * hwmon interfaces for GPU voltage: + * - in0_input: the voltage on the GPU in millivolts + * - in1_input: the voltage on the Northbridge in millivolts + * + * hwmon interfaces for GPU power: + * - power1_average: average power used by the GPU in microWatts + * - power1_cap_min: minimum cap supported in microWatts + * - power1_cap_max: maximum cap supported in microWatts + * - power1_cap: selected power cap in microWatts + * + * hwmon interfaces for GPU fan: + * - pwm1: pulse width modulation fan level (0-255) + * - pwm1_enable: pulse width modulation fan control method + * 0: no fan speed control + * 1: manual fan speed control using pwm interface + * 2: automatic fan speed control + * - pwm1_min: pulse width modulation fan control minimum level (0) + * - pwm1_max: pulse width modulation fan control maximum level (255) + * - fan1_input: fan speed in RPM + * + */ + static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, amdgpu_hwmon_show_temp, NULL, 0); static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, amdgpu_hwmon_show_temp_thresh, NULL, 0); static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO, amdgpu_hwmon_show_temp_thresh, NULL, 1); -- 2.13.6
