[PATCH V2 11/20] thermal: exynos: Add support for instance based register/unregister

Amit Daniel Kachhap
2013-04-26T10:39:01Z

This code modifies the thermal driver to have multiple thermal zone
support by replacing the global thermal zone variable with device data
member of thermal_zone_device.

Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Amit Daniel Kachhap <amit.daniel@samsung.com>
---
drivers/thermal/samsung/exynos_thermal_common.c | 36 ++++++++++++++--------
drivers/thermal/samsung/exynos_thermal_common.h | 5 ++-
drivers/thermal/samsung/exynos_tmu.c | 15 +++++----
3 files changed, 34 insertions(+), 22 deletions(-)

diff --git a/drivers/thermal/samsung/exynos_thermal_common.c b/drivers/thermal/samsung/exynos_thermal_common.c
index dae5476..d4cd5ec 100644
--- a/drivers/thermal/samsung/exynos_thermal_common.c
+++ b/drivers/thermal/samsung/exynos_thermal_common.c
@@ -41,12 +41,11 @@ struct exynos_thermal_zone {
bool bind;
};

-static struct exynos_thermal_zone *th_zone;
-
/* Get mode callback functions for thermal zone */
static int exynos_get_mode(struct thermal_zone_device *thermal,
enum thermal_device_mode *mode)
{
+ struct exynos_thermal_zone *th_zone = thermal->devdata;
if (th_zone)
*mode = th_zone->mode;
return 0;
@@ -56,25 +55,26 @@ static int exynos_get_mode(struct thermal_zone_device *thermal,
static int exynos_set_mode(struct thermal_zone_device *thermal,
enum thermal_device_mode mode)
{
- if (!th_zone->therm_dev) {
+ struct exynos_thermal_zone *th_zone = thermal->devdata;
+ if (!th_zone) {
pr_notice("thermal zone not registered\n");
return 0;
}

- mutex_lock(&th_zone->therm_dev->lock);
+ mutex_lock(&thermal->lock);

if (mode == THERMAL_DEVICE_ENABLED &&
!th_zone->sensor_conf->trip_data.trigger_falling)
- th_zone->therm_dev->polling_delay = IDLE_INTERVAL;
+ thermal->polling_delay = IDLE_INTERVAL;
else
- th_zone->therm_dev->polling_delay = 0;
+ thermal->polling_delay = 0;

- mutex_unlock(&th_zone->therm_dev->lock);
+ mutex_unlock(&thermal->lock);

th_zone->mode = mode;
- thermal_zone_device_update(th_zone->therm_dev);
+ thermal_zone_device_update(thermal);
pr_info("thermal polling set for duration=%d msec\n",
- th_zone->therm_dev->polling_delay);
+ thermal->polling_delay);
return 0;
}

@@ -101,6 +101,8 @@ static int exynos_get_trip_type(struct thermal_zone_device *thermal, int trip,
static int exynos_get_trip_temp(struct thermal_zone_device *thermal, int trip,
unsigned long *temp)
{
+ struct exynos_thermal_zone *th_zone = thermal->devdata;
+
if (trip < GET_TRIP(MONITOR_ZONE) || trip > GET_TRIP(PANIC_ZONE))
return -EINVAL;

@@ -127,6 +129,7 @@ static int exynos_bind(struct thermal_zone_device *thermal,
{
int ret = 0, i, tab_size, level;
struct freq_clip_table *tab_ptr, *clip_data;
+ struct exynos_thermal_zone *th_zone = thermal->devdata;
struct thermal_sensor_conf *data = th_zone->sensor_conf;

tab_ptr = (struct freq_clip_table *)data->cooling_data.freq_data;
@@ -173,6 +176,7 @@ static int exynos_unbind(struct thermal_zone_device *thermal,
struct thermal_cooling_device *cdev)
{
int ret = 0, i, tab_size;
+ struct exynos_thermal_zone *th_zone = thermal->devdata;
struct thermal_sensor_conf *data = th_zone->sensor_conf;

if (th_zone->bind == false)
@@ -215,6 +219,7 @@ static int exynos_unbind(struct thermal_zone_device *thermal,
static int exynos_get_temp(struct thermal_zone_device *thermal,
unsigned long *temp)
{
+ struct exynos_thermal_zone *th_zone = thermal->devdata;
void *data;

if (!th_zone->sensor_conf) {
@@ -234,6 +239,7 @@ static int exynos_set_emul_temp(struct thermal_zone_device *thermal,
{
void *data;
int ret = -EINVAL;
+ struct exynos_thermal_zone *th_zone = thermal->devdata;

if (!th_zone->sensor_conf) {
pr_info("Temperature sensor not initialised\n");
@@ -281,11 +287,12 @@ static struct thermal_zone_device_ops const exynos_dev_ops = {
* This function may be called from interrupt based temperature sensor
* when threshold is changed.
*/
-void exynos_report_trigger(void)
+void exynos_report_trigger(struct thermal_sensor_conf *conf)
{
unsigned int i;
char data[10];
char *envp[] = { data, NULL };
+ struct exynos_thermal_zone *th_zone = conf->pzone_data;

if (!th_zone || !th_zone->therm_dev)
return;
@@ -326,6 +333,7 @@ int exynos_register_thermal(struct thermal_sensor_conf *sensor_conf)
{
int ret;
struct cpumask mask_val;
+ struct exynos_thermal_zone *th_zone;

if (!sensor_conf || !sensor_conf->read_temperature) {
pr_err("Temperature sensor not initialised\n");
@@ -347,7 +355,7 @@ int exynos_register_thermal(struct thermal_sensor_conf *sensor_conf)
th_zone->cool_dev_size++;

th_zone->therm_dev = thermal_zone_device_register(sensor_conf->name,
- EXYNOS_ZONE_COUNT, 0, NULL, &exynos_dev_ops, NULL, 0,
+ EXYNOS_ZONE_COUNT, 0, th_zone, &exynos_dev_ops, NULL, 0,
sensor_conf->trip_data.trigger_falling ?
0 : IDLE_INTERVAL);

@@ -357,20 +365,22 @@ int exynos_register_thermal(struct thermal_sensor_conf *sensor_conf)
goto err_unregister;
}
th_zone->mode = THERMAL_DEVICE_ENABLED;
+ sensor_conf->pzone_data = th_zone;

pr_info("Exynos: Kernel Thermal management registered\n");

return 0;

err_unregister:
- exynos_unregister_thermal();
+ exynos_unregister_thermal(sensor_conf);
return ret;
}

/* Un-Register with the in-kernel thermal management */
-void exynos_unregister_thermal(void)
+void exynos_unregister_thermal(struct thermal_sensor_conf *sensor_conf)
{
int i;
+ struct exynos_thermal_zone *th_zone = sensor_conf->pzone_data;

if (!th_zone)
return;
diff --git a/drivers/thermal/samsung/exynos_thermal_common.h b/drivers/thermal/samsung/exynos_thermal_common.h
index 6ed9bd9..26fdf8d 100644
--- a/drivers/thermal/samsung/exynos_thermal_common.h
+++ b/drivers/thermal/samsung/exynos_thermal_common.h
@@ -77,10 +77,11 @@ struct thermal_sensor_conf {
struct thermal_trip_point_conf trip_data;
struct thermal_cooling_conf cooling_data;
void *private_data;
+ void *pzone_data;
};

/*Functions used exynos based thermal sensor driver*/
-void exynos_unregister_thermal(void);
+void exynos_unregister_thermal(struct thermal_sensor_conf *sensor_conf);
int exynos_register_thermal(struct thermal_sensor_conf *sensor_conf);
-void exynos_report_trigger(void);
+void exynos_report_trigger(struct thermal_sensor_conf *sensor_conf);
#endif /* _LINUX_EXYNOS_THERMAL_COMMON_H */
diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
index 082d5a2..133d3f5 100644
--- a/drivers/thermal/samsung/exynos_tmu.c
+++ b/drivers/thermal/samsung/exynos_tmu.c
@@ -319,6 +319,12 @@ static int exynos_tmu_set_emulation(void *drv_data, unsigned long temp)
{ return -EINVAL; }
#endif/*CONFIG_THERMAL_EMULATION*/

+static struct thermal_sensor_conf exynos_sensor_conf = {
+ .name = "exynos-therm",
+ .read_temperature = (int (*)(void *))exynos_tmu_read,
+ .write_emul_temp = exynos_tmu_set_emulation,
+};
+
static void exynos_tmu_work(struct work_struct *work)
{
struct exynos_tmu_data *data = container_of(work,
@@ -327,7 +333,7 @@ static void exynos_tmu_work(struct work_struct *work)
struct exynos_tmu_registers *reg = pdata->registers;
unsigned int val_irq;

- exynos_report_trigger();
+ exynos_report_trigger(&exynos_sensor_conf);
mutex_lock(&data->lock);
clk_enable(data->clk);

@@ -350,11 +356,6 @@ static irqreturn_t exynos_tmu_irq(int irq, void *id)

return IRQ_HANDLED;
}
-static struct thermal_sensor_conf exynos_sensor_conf = {
- .name = "exynos-therm",
- .read_temperature = (int (*)(void *))exynos_tmu_read,
- .write_emul_temp = exynos_tmu_set_emulation,
-};

#ifdef CONFIG_OF
static const struct of_device_id exynos_tmu_match[] = {
@@ -520,7 +521,7 @@ static int exynos_tmu_remove(struct platform_device *pdev)

exynos_tmu_control(pdev, false);

- exynos_unregister_thermal();
+ exynos_unregister_thermal(&exynos_sensor_conf);

clk_unprepare(data->clk);

--
1.7.1