summaryrefslogtreecommitdiffstats
path: root/drivers/thermal
diff options
context:
space:
mode:
authorDaniel Lezcano <daniel.lezcano@linaro.org>2017-10-19 19:05:44 +0200
committerEduardo Valentin <edubezval@gmail.com>2017-10-31 19:32:14 -0700
commitff4ec2997df8fe7cc40513dbe5f86d9f88fb6be7 (patch)
treecd5f690d4295ae448a3efeb047f0a0ca7d8dbb8e /drivers/thermal
parentc176b10b025acee4dc8f2ab1cd64eb73b5ccef53 (diff)
downloadlinux-ff4ec2997df8fe7cc40513dbe5f86d9f88fb6be7.tar.bz2
thermal/drivers/hisi: Remove the multiple sensors support
By essence, the tsensor does not really support multiple sensor at the same time. It allows to set a sensor and use it to get the temperature, another sensor could be switched but with a delay of 3-5ms. It is difficult to read simultaneously several sensors without a big delay. Today, just one sensor is used, it is not necessary to deal with multiple sensors in the code. Remove them and if it is needed in the future add them on top of a code which will be clean up in the meantime. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Reviewed-by: Leo Yan <leo.yan@linaro.org> Acked-by: Wangtao (Kevin, Kirin) <kevin.wangtao@hisilicon.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'drivers/thermal')
-rw-r--r--drivers/thermal/hisi_thermal.c75
1 files changed, 19 insertions, 56 deletions
diff --git a/drivers/thermal/hisi_thermal.c b/drivers/thermal/hisi_thermal.c
index 8381696241d6..725d0d434d83 100644
--- a/drivers/thermal/hisi_thermal.c
+++ b/drivers/thermal/hisi_thermal.c
@@ -39,6 +39,7 @@
#define HISI_TEMP_RESET (100000)
#define HISI_MAX_SENSORS 4
+#define HISI_DEFAULT_SENSOR 2
struct hisi_thermal_sensor {
struct hisi_thermal_data *thermal;
@@ -53,9 +54,8 @@ struct hisi_thermal_data {
struct mutex thermal_lock; /* protects register data */
struct platform_device *pdev;
struct clk *clk;
- struct hisi_thermal_sensor sensors[HISI_MAX_SENSORS];
-
- int irq, irq_bind_sensor;
+ struct hisi_thermal_sensor sensors;
+ int irq;
bool irq_enabled;
void __iomem *regs;
@@ -113,7 +113,7 @@ static void hisi_thermal_enable_bind_irq_sensor
mutex_lock(&data->thermal_lock);
- sensor = &data->sensors[data->irq_bind_sensor];
+ sensor = &data->sensors;
/* setting the hdak time */
writel(0x0, data->regs + TEMP0_CFG);
@@ -160,31 +160,8 @@ 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 = -1, i;
- long max_temp = 0;
-
*temp = hisi_thermal_get_sensor_temp(data, sensor);
- 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);
-
dev_dbg(&data->pdev->dev, "id=%d, irq=%d, temp=%d, thres=%d\n",
sensor->id, data->irq_enabled, *temp, sensor->thres_temp);
/*
@@ -197,7 +174,7 @@ static int hisi_thermal_get_temp(void *_sensor, int *temp)
return 0;
}
- if (max_temp < sensor->thres_temp) {
+ if (*temp < sensor->thres_temp) {
data->irq_enabled = true;
hisi_thermal_enable_bind_irq_sensor(data);
enable_irq(data->irq);
@@ -224,22 +201,16 @@ static irqreturn_t hisi_thermal_alarm_irq_thread(int irq, void *dev)
{
struct hisi_thermal_data *data = dev;
struct hisi_thermal_sensor *sensor;
- int i;
mutex_lock(&data->thermal_lock);
- sensor = &data->sensors[data->irq_bind_sensor];
+ sensor = &data->sensors;
dev_crit(&data->pdev->dev, "THERMAL ALARM: T > %d\n",
sensor->thres_temp / 1000);
mutex_unlock(&data->thermal_lock);
- for (i = 0; i < HISI_MAX_SENSORS; i++) {
- if (!data->sensors[i].tzd)
- continue;
-
- thermal_zone_device_update(data->sensors[i].tzd,
- THERMAL_EVENT_UNSPECIFIED);
- }
+ thermal_zone_device_update(data->sensors.tzd,
+ THERMAL_EVENT_UNSPECIFIED);
return IRQ_HANDLED;
}
@@ -296,7 +267,6 @@ static int hisi_thermal_probe(struct platform_device *pdev)
{
struct hisi_thermal_data *data;
struct resource *res;
- int i;
int ret;
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
@@ -347,16 +317,17 @@ static int hisi_thermal_probe(struct platform_device *pdev)
hisi_thermal_enable_bind_irq_sensor(data);
data->irq_enabled = true;
- for (i = 0; i < HISI_MAX_SENSORS; ++i) {
- ret = hisi_thermal_register_sensor(pdev, data,
- &data->sensors[i], i);
- if (ret)
- dev_err(&pdev->dev,
- "failed to register thermal sensor: %d\n", ret);
- else
- hisi_thermal_toggle_sensor(&data->sensors[i], true);
+ ret = hisi_thermal_register_sensor(pdev, data,
+ &data->sensors,
+ HISI_DEFAULT_SENSOR);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register thermal sensor: %d\n",
+ ret);
+ return ret;
}
+ hisi_thermal_toggle_sensor(&data->sensors, true);
+
enable_irq(data->irq);
return 0;
@@ -365,17 +336,9 @@ static int hisi_thermal_probe(struct platform_device *pdev)
static int hisi_thermal_remove(struct platform_device *pdev)
{
struct hisi_thermal_data *data = platform_get_drvdata(pdev);
- int i;
-
- 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);
- }
+ struct hisi_thermal_sensor *sensor = &data->sensors;
+ hisi_thermal_toggle_sensor(sensor, false);
hisi_thermal_disable_sensor(data);
clk_disable_unprepare(data->clk);