brya: tune fan parameters
This tunes the fan parameters for the brya prototype fan. These are
temporary parameters until a real fan is available.
BRANCH=none
TEST=observed fan speeds using EC CLI
@@ -28,18 +28,15 @@ static const struct fan_conf fan_conf_0 = {
};
/*
- * TOOD(caveh): this is from volteer, need to update for brya
+ * TOOD(b/180681346): need to update for real fan
*
- * Fan specs from datasheet:
- * Max speed 5900 rpm (+/- 7%), minimum duty cycle 30%.
- * Minimum speed not specified by RPM. Set minimum RPM to max speed (with
- * margin) x 30%.
- * 5900 x 1.07 x 0.30 = 1894, round up to 1900
+ * Prototype fan spins at about 7200 RPM at 100% PWM.
+ * Set minimum at around 30% PWM.
*/
static const struct fan_rpm fan_rpm_0 = {
- .rpm_min = 1900,
- .rpm_start = 1900,
- .rpm_max = 5900,
+ .rpm_min = 2200,
+ .rpm_start = 2200,
+ .rpm_max = 7200,
};
const struct fan_t fans[FAN_CH_COUNT] = {
