@@ -38,6 +38,8 @@
#define TMU_VER1 0x1
#define TMU_VER2 0x2
+#define IMX_TEMP_COOL_MARGIN 10000
+
struct thermal_soc_data {
u32 num_sensors;
u32 version;
@@ -103,8 +105,33 @@ static int tmu_get_temp(void *data, int *temp)
return tmu->socdata->get_temp(data, temp);
}
+static int tmu_get_trend(void *p, int trip, enum thermal_trend *trend)
+{
+ struct tmu_sensor *sensor = p;
+ int trip_temp, temp, ret;
+
+ if (!sensor->tzd)
+ return -EINVAL;
+
+ ret = sensor->tzd->ops->get_trip_temp(sensor->tzd, trip, &trip_temp);
+ if (ret)
+ return ret;
+
+ temp = READ_ONCE(sensor->tzd->temperature);
+
+ if (temp > trip_temp)
+ *trend = THERMAL_TREND_RAISE_FULL;
+ else if (temp < (trip_temp - IMX_TEMP_COOL_MARGIN))
+ *trend = THERMAL_TREND_DROP_FULL;
+ else
+ *trend = THERMAL_TREND_STABLE;
+
+ return 0;
+}
+
static struct thermal_zone_of_device_ops tmu_tz_ops = {
.get_temp = tmu_get_temp,
+ .get_trend = tmu_get_trend,
};
static void imx8mm_tmu_enable(struct imx8mm_tmu *tmu, bool enable)
Add get_trend ops for i.MX8MM thermal to apply fast cooling mechanism, when temperature exceeds passive trip point, the highest cooling action will be applied, and when temperature drops to lower than the margin below passive trip point, the lowest cooling action will be applied. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> --- drivers/thermal/imx8mm_thermal.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+)