Commit 439dc968 authored by Leo Yan's avatar Leo Yan Committed by Eduardo Valentin
Browse files

thermal: hisilicon: support to use any sensor 



In current code sensor driver registers all 4 sensors together and if
any of them has not bound to thermal zone successfully then driver will
return failure for driver's initialization. As a result, if DT binds
thermal zone with only one sensor, then the thermal driver will not work
well anymore.

So this patch is to fix this issue. It allows the thermal sensor driver
can register any number sensors at initialization phase, and fix up code
for other related code to skip related sensor's accessing if the sensor
has not been enabled in initialization phase.

Signed-off-by: default avatarLeo Yan <leo.yan@linaro.org>
Signed-off-by: default avatarEduardo Valentin <edubezval@gmail.com>
parent 13849883

drivers/thermal/hisi_thermal.c

+20 −13
Original line number Diff line number Diff line
@@ -160,7 +160,7 @@ static int hisi_thermal_get_temp(void *_sensor, int *temp) 
	struct hisi_thermal_sensor *sensor = _sensor;

	struct hisi_thermal_data *data = sensor->thermal;



	int sensor_id = 0, i;

	int sensor_id = -1, i;

	long max_temp = 0;



	*temp = hisi_thermal_get_sensor_temp(data, sensor);
@@ -168,12 +168,19 @@ static int hisi_thermal_get_temp(void *_sensor, int *temp) 
	sensor->sensor_temp = *temp;



	for (i = 0; i < HISI_MAX_SENSORS; i++) {

		if (!data->sensors[i].tzd)

			continue;



		if (data->sensors[i].sensor_temp >= max_temp) {

			max_temp = data->sensors[i].sensor_temp;

			sensor_id = i;

		}

	}



	/* If no sensor has been enabled, then skip to enable irq */

	if (sensor_id == -1)

		return 0;



	mutex_lock(&data->thermal_lock);

	data->irq_bind_sensor = sensor_id;

	mutex_unlock(&data->thermal_lock);
@@ -226,8 +233,12 @@ static irqreturn_t hisi_thermal_alarm_irq_thread(int irq, void *dev) 
		 sensor->thres_temp / 1000);

	mutex_unlock(&data->thermal_lock);



	for (i = 0; i < HISI_MAX_SENSORS; i++)

	for (i = 0; i < HISI_MAX_SENSORS; i++) {

		if (!data->sensors[i].tzd)

			continue;



		thermal_zone_device_update(data->sensors[i].tzd);

	}



	return IRQ_HANDLED;

}
@@ -247,6 +258,7 @@ static int hisi_thermal_register_sensor(struct platform_device *pdev, 
				sensor->id, sensor, &hisi_of_thermal_ops);

	if (IS_ERR(sensor->tzd)) {

		ret = PTR_ERR(sensor->tzd);

		sensor->tzd = NULL;

		dev_err(&pdev->dev, "failed to register sensor id %d: %d\n",

			sensor->id, ret);

		return ret;
@@ -334,25 +346,17 @@ static int hisi_thermal_probe(struct platform_device *pdev) 
	for (i = 0; i < HISI_MAX_SENSORS; ++i) {

		ret = hisi_thermal_register_sensor(pdev, data,

						   &data->sensors[i], i);

		if (ret) {

		if (ret)

			dev_err(&pdev->dev,

				"failed to register thermal sensor: %d\n", ret);

			goto err_get_sensor_data;

		}

		else

			hisi_thermal_toggle_sensor(&data->sensors[i], true);

	}



	hisi_thermal_enable_bind_irq_sensor(data);

	data->irq_enabled = true;



	for (i = 0; i < HISI_MAX_SENSORS; i++)

		hisi_thermal_toggle_sensor(&data->sensors[i], true);



	return 0;



err_get_sensor_data:

	clk_disable_unprepare(data->clk);



	return ret;

}



static int hisi_thermal_remove(struct platform_device *pdev)
@@ -363,6 +367,9 @@ static int hisi_thermal_remove(struct platform_device *pdev) 
	for (i = 0; i < HISI_MAX_SENSORS; i++) {

		struct hisi_thermal_sensor *sensor = &data->sensors[i];



		if (!sensor->tzd)

			continue;



		hisi_thermal_toggle_sensor(sensor, false);

	}

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