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Thermal: Remove tc1/tc2 in generic thermal layer.

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Remove tc1/tc2 in generic thermal layer.
.get_trend() callback starts to take effect from this patch.

Signed-off-by: Zhang Rui <[email protected]>
Reviewed-by: Rafael J. Wysocki <[email protected]>
Reviewed-by: Valentin, Eduardo <[email protected]>
This commit is contained in:
Zhang Rui 2012-06-27 09:51:12 +08:00
commit 1b7ddb840c
8 changed files with 13 additions and 31 deletions
Download patch file Download diff file Expand all files Collapse all files

2
drivers/thermal/spear_thermal.c
View file

@ -147,7 +147,7 @@ static int spear_thermal_probe(struct platform_device *pdev)
writel_relaxed(stdev->flags, stdev->thermal_base);
spear_thermal = thermal_zone_device_register("spear_thermal", 0, 0,
stdev, &ops, 0, 0, 0, 0);
stdev, &ops, 0, 0);
if (IS_ERR(spear_thermal)) {
dev_err(&pdev->dev, "thermal zone device is NULL\n");
ret = PTR_ERR(spear_thermal);

24
drivers/thermal/thermal_sys.c
View file

@ -335,9 +335,6 @@ passive_store(struct device *dev, struct device_attribute *attr,
tz->passive_delay = 0;
}
tz->tc1 = 1;
tz->tc2 = 1;
tz->forced_passive = state;
thermal_zone_device_update(tz);
@ -718,13 +715,12 @@ static void thermal_zone_device_set_polling(struct thermal_zone_device *tz,
static void thermal_zone_device_passive(struct thermal_zone_device *tz,
int temp, int trip_temp, int trip)
{
int trend = 0;
enum thermal_trend trend;
struct thermal_cooling_device_instance *instance;
struct thermal_cooling_device *cdev;
long state, max_state;
if (!tz->ops->get_trend ||
tz->ops->get_trend(tz, trip, (enum thermal_trend *)&trend)) {
if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) {
/*
* compare the current temperature and previous temperature
* to get the thermal trend, if no special requirement
@ -747,11 +743,8 @@ static void thermal_zone_device_passive(struct thermal_zone_device *tz,
if (temp >= trip_temp) {
tz->passive = true;
trend = (tz->tc1 * (temp - tz->last_temperature)) +
(tz->tc2 * (temp - trip_temp));
/* Heating up? */
if (trend > 0) {
if (trend == THERMAL_TREND_RAISING) {
list_for_each_entry(instance, &tz->cooling_devices,
node) {
if (instance->trip != trip)
@ -762,7 +755,7 @@ static void thermal_zone_device_passive(struct thermal_zone_device *tz,
if (state++ < max_state)
cdev->ops->set_cur_state(cdev, state);
}
} else if (trend < 0) { /* Cooling off? */
} else if (trend == THERMAL_TREND_DROPPING) { /* Cooling off? */
list_for_each_entry(instance, &tz->cooling_devices,
node) {
if (instance->trip != trip)
@ -1288,8 +1281,6 @@ static void remove_trip_attrs(struct thermal_zone_device *tz)
* @mask: a bit string indicating the writeablility of trip points
* @devdata: private device data
* @ops: standard thermal zone device callbacks
* @tc1: thermal coefficient 1 for passive calculations
* @tc2: thermal coefficient 2 for passive calculations
* @passive_delay: number of milliseconds to wait between polls when
* performing passive cooling
* @polling_delay: number of milliseconds to wait between polls when checking
@ -1297,13 +1288,12 @@ static void remove_trip_attrs(struct thermal_zone_device *tz)
* driven systems)
*
* thermal_zone_device_unregister() must be called when the device is no
* longer needed. The passive cooling formula uses tc1 and tc2 as described in
* section 11.1.5.1 of the ACPI specification 3.0.
* longer needed. The passive cooling depends on the .get_trend() return value.
*/
struct thermal_zone_device *thermal_zone_device_register(const char *type,
int trips, int mask, void *devdata,
const struct thermal_zone_device_ops *ops,
int tc1, int tc2, int passive_delay, int polling_delay)
int passive_delay, int polling_delay)
{
struct thermal_zone_device *tz;
struct thermal_cooling_device *pos;
@ -1339,8 +1329,6 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type,
tz->device.class = &thermal_class;
tz->devdata = devdata;
tz->trips = trips;
tz->tc1 = tc1;
tz->tc2 = tc2;
tz->passive_delay = passive_delay;
tz->polling_delay = polling_delay;