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Thermal: int3403: Add CRT and PSV trip 

The ACPI object definition can contain passive and critical
trip temperature. Export them via thermal sysfs.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
hifive-unleashed-5.1
Srinivas Pandruvada 2014-05-30 12:10:32 -07:00 committed by Zhang Rui
parent a497c3ba1d
commit 5fcdeb20df
1 changed files with 60 additions and 7 deletions
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67
drivers/thermal/int3403_thermal.c
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@ -33,6 +33,10 @@
struct int3403_sensor {
struct thermal_zone_device *tzone;
unsigned long *thresholds;
unsigned long crit_temp;
int crit_trip_id;
unsigned long psv_temp;
int psv_trip_id;
};
static int sys_get_curr_temp(struct thermal_zone_device *tzone,
@ -79,12 +83,18 @@ static int sys_get_trip_temp(struct thermal_zone_device *tzone,
struct acpi_device *device = tzone->devdata;
struct int3403_sensor *obj = acpi_driver_data(device);
/*
* get_trip_temp is a mandatory callback but
* PATx method doesn't return any value, so return
* cached value, which was last set from user space.
*/
*temp = obj->thresholds[trip];
if (trip == obj->crit_trip_id)
*temp = obj->crit_temp;
else if (trip == obj->psv_trip_id)
*temp = obj->psv_temp;
else {
/*
* get_trip_temp is a mandatory callback but
* PATx method doesn't return any value, so return
* cached value, which was last set from user space.
*/
*temp = obj->thresholds[trip];
}
return 0;
}
@ -92,8 +102,14 @@ static int sys_get_trip_temp(struct thermal_zone_device *tzone,
static int sys_get_trip_type(struct thermal_zone_device *thermal,
int trip, enum thermal_trip_type *type)
{
struct acpi_device *device = thermal->devdata;
struct int3403_sensor *obj = acpi_driver_data(device);
/* Mandatory callback, may not mean much here */
*type = THERMAL_TRIP_PASSIVE;
if (trip == obj->crit_trip_id)
*type = THERMAL_TRIP_CRITICAL;
else
*type = THERMAL_TRIP_PASSIVE;
return 0;
}
@ -155,6 +171,34 @@ static void acpi_thermal_notify(struct acpi_device *device, u32 event)
}
}
static int sys_get_trip_crt(struct acpi_device *device, unsigned long *temp)
{
unsigned long long crt;
acpi_status status;
status = acpi_evaluate_integer(device->handle, "_CRT", NULL, &crt);
if (ACPI_FAILURE(status))
return -EIO;
*temp = DECI_KELVIN_TO_MILLI_CELSIUS(crt, KELVIN_OFFSET);
return 0;
}
static int sys_get_trip_psv(struct acpi_device *device, unsigned long *temp)
{
unsigned long long psv;
acpi_status status;
status = acpi_evaluate_integer(device->handle, "_PSV", NULL, &psv);
if (ACPI_FAILURE(status))
return -EIO;
*temp = DECI_KELVIN_TO_MILLI_CELSIUS(psv, KELVIN_OFFSET);
return 0;
}
static int acpi_int3403_add(struct acpi_device *device)
{
int result = 0;
@ -194,6 +238,15 @@ static int acpi_int3403_add(struct acpi_device *device)
return -ENOMEM;
trip_mask = BIT(trip_cnt) - 1;
}
obj->psv_trip_id = -1;
if (!sys_get_trip_psv(device, &obj->psv_temp))
obj->psv_trip_id = trip_cnt++;
obj->crit_trip_id = -1;
if (!sys_get_trip_crt(device, &obj->crit_temp))
obj->crit_trip_id = trip_cnt++;
obj->tzone = thermal_zone_device_register(acpi_device_bid(device),
trip_cnt, trip_mask, device, &tzone_ops,
NULL, 0, 0);