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thermal: intel: intel_pch: Use generic trip points

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The thermal framework gives the possibility to register the trip
points along with the thermal zone.  When that is done, no get_trip_*
callbacks are needed and they can be removed.

Convert the existing callbacks content logic into generic trip points
initialization code and register them along with the thermal zone.

In order to consolidate the code, use an ACPI trip library function
to populate a generic trip point.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Zhang Rui <rui.zhang@intel.com>
[ rjw: Subject and changelog edits, rebase ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
This commit is contained in:
Daniel Lezcano 2023-01-23 19:40:33 +01:00 committed by Rafael J. Wysocki
parent 7a0e397488
commit fee19c6921
2 changed files with 18 additions and 67 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/thermal/intel/Kconfig
View File

@ -81,6 +81,7 @@ config INTEL_BXT_PMIC_THERMAL
config INTEL_PCH_THERMAL
tristate "Intel PCH Thermal Reporting Driver"
depends on X86 && PCI
select THERMAL_ACPI if ACPI
help
Enable this to support thermal reporting on certain intel PCHs.
Thermal reporting device will provide temperature reading,

84
drivers/thermal/intel/intel_pch_thermal.c
View File

@ -66,6 +66,8 @@
#define WPT_TEMP_OFFSET (PCH_TEMP_OFFSET * MILLIDEGREE_PER_DEGREE)
#define GET_PCH_TEMP(x) (((x) / 2) + PCH_TEMP_OFFSET)
#define PCH_MAX_TRIPS 3 /* critical, hot, passive */
/* Amount of time for each cooling delay, 100ms by default for now */
static unsigned int delay_timeout = 100;
module_param(delay_timeout, int, 0644);
@ -83,12 +85,7 @@ struct pch_thermal_device {
const struct pch_dev_ops *ops;
struct pci_dev *pdev;
struct thermal_zone_device *tzd;
int crt_trip_id;
unsigned long crt_temp;
int hot_trip_id;
unsigned long hot_temp;
int psv_trip_id;
unsigned long psv_temp;
struct thermal_trip trips[PCH_MAX_TRIPS];
bool bios_enabled;
};
@ -103,33 +100,22 @@ static void pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd,
int *nr_trips)
{
struct acpi_device *adev;
ptd->psv_trip_id = -1;
int ret;
adev = ACPI_COMPANION(&ptd->pdev->dev);
if (adev) {
unsigned long long r;
acpi_status status;
if (!adev)
return;
status = acpi_evaluate_integer(adev->handle, "_PSV", NULL,
&r);
if (ACPI_SUCCESS(status)) {
unsigned long trip_temp;
ret = thermal_acpi_trip_passive(adev, &ptd->trips[*nr_trips]);
if (ret)
return;
trip_temp = deci_kelvin_to_millicelsius(r);
if (trip_temp) {
ptd->psv_temp = trip_temp;
ptd->psv_trip_id = *nr_trips;
++(*nr_trips);
}
}
}
++(*nr_trips);
}
#else
static void pch_wpt_add_acpi_psv_trip(struct pch_thermal_device *ptd,
int *nr_trips)
{
ptd->psv_trip_id = -1;
}
#endif
@ -164,21 +150,19 @@ static int pch_wpt_init(struct pch_thermal_device *ptd, int *nr_trips)
}
read_trips:
ptd->crt_trip_id = -1;
trip_temp = readw(ptd->hw_base + WPT_CTT);
trip_temp &= 0x1FF;
if (trip_temp) {
ptd->crt_temp = GET_WPT_TEMP(trip_temp);
ptd->crt_trip_id = 0;
ptd->trips[*nr_trips].temperature = GET_WPT_TEMP(trip_temp);
ptd->trips[*nr_trips].type = THERMAL_TRIP_CRITICAL;
++(*nr_trips);
}
ptd->hot_trip_id = -1;
trip_temp = readw(ptd->hw_base + WPT_PHL);
trip_temp &= 0x1FF;
if (trip_temp) {
ptd->hot_temp = GET_WPT_TEMP(trip_temp);
ptd->hot_trip_id = *nr_trips;
ptd->trips[*nr_trips].temperature = GET_WPT_TEMP(trip_temp);
ptd->trips[*nr_trips].type = THERMAL_TRIP_HOT;
++(*nr_trips);
}
@ -299,39 +283,6 @@ static int pch_thermal_get_temp(struct thermal_zone_device *tzd, int *temp)
return ptd->ops->get_temp(ptd, temp);
}
static int pch_get_trip_type(struct thermal_zone_device *tzd, int trip,
enum thermal_trip_type *type)
{
struct pch_thermal_device *ptd = tzd->devdata;
if (ptd->crt_trip_id == trip)
*type = THERMAL_TRIP_CRITICAL;
else if (ptd->hot_trip_id == trip)
*type = THERMAL_TRIP_HOT;
else if (ptd->psv_trip_id == trip)
*type = THERMAL_TRIP_PASSIVE;
else
return -EINVAL;
return 0;
}
static int pch_get_trip_temp(struct thermal_zone_device *tzd, int trip, int *temp)
{
struct pch_thermal_device *ptd = tzd->devdata;
if (ptd->crt_trip_id == trip)
*temp = ptd->crt_temp;
else if (ptd->hot_trip_id == trip)
*temp = ptd->hot_temp;
else if (ptd->psv_trip_id == trip)
*temp = ptd->psv_temp;
else
return -EINVAL;
return 0;
}
static void pch_critical(struct thermal_zone_device *tzd)
{
dev_dbg(&tzd->device, "%s: critical temperature reached\n", tzd->type);
@ -339,8 +290,6 @@ static void pch_critical(struct thermal_zone_device *tzd)
static struct thermal_zone_device_ops tzd_ops = {
.get_temp = pch_thermal_get_temp,
.get_trip_type = pch_get_trip_type,
.get_trip_temp = pch_get_trip_temp,
.critical = pch_critical,
};
@ -429,8 +378,9 @@ static int intel_pch_thermal_probe(struct pci_dev *pdev,
if (err)
goto error_cleanup;
ptd->tzd = thermal_zone_device_register(bi->name, nr_trips, 0, ptd,
&tzd_ops, NULL, 0, 0);
ptd->tzd = thermal_zone_device_register_with_trips(bi->name, ptd->trips,
nr_trips, 0, ptd,
&tzd_ops, NULL, 0, 0);
if (IS_ERR(ptd->tzd)) {
dev_err(&pdev->dev, "Failed to register thermal zone %s\n",
bi->name);