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authorSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>2014-05-30 12:10:32 -0700
committerZhang Rui <rui.zhang@intel.com>2014-06-30 10:13:22 +0800
commit5fcdeb20df2085580819c665ae50f7dae964c27d (patch)
treeab96e86edc689001968de5999811ef7571d7ca3f /drivers/thermal
parenta497c3ba1d97fc69c1e78e7b96435ba8c2cb42ee (diff)
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>
Diffstat (limited to 'drivers/thermal')
-rw-r--r--drivers/thermal/int3403_thermal.c67
1 files changed, 60 insertions, 7 deletions
diff --git a/drivers/thermal/int3403_thermal.c b/drivers/thermal/int3403_thermal.c
index e93f0253f6ed..17554eeb3953 100644
--- a/drivers/thermal/int3403_thermal.c
+++ b/drivers/thermal/int3403_thermal.c
@@ -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);