1 files changed, 318 insertions, 0 deletions
diff --git a/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
new file mode 100644
index 000000000..0a4eaa307
--- /dev/null
+++ b/drivers/thermal/intel/int340x_thermal/int340x_thermal_zone.c
@@ -0,0 +1,318 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * int340x_thermal_zone.c
+ * Copyright (c) 2015, Intel Corporation.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <linux/thermal.h>
+#include <linux/units.h>
+#include "int340x_thermal_zone.h"
+
+static int int340x_thermal_get_zone_temp(struct thermal_zone_device *zone,
+					 int *temp)
+{
+	struct int34x_thermal_zone *d = zone->devdata;
+	unsigned long long tmp;
+	acpi_status status;
+
+	if (d->override_ops && d->override_ops->get_temp)
+		return d->override_ops->get_temp(zone, temp);
+
+	status = acpi_evaluate_integer(d->adev->handle, "_TMP", NULL, &tmp);
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	if (d->lpat_table) {
+		int conv_temp;
+
+		conv_temp = acpi_lpat_raw_to_temp(d->lpat_table, (int)tmp);
+		if (conv_temp < 0)
+			return conv_temp;
+
+		*temp = (unsigned long)conv_temp * 10;
+	} else
+		/* _TMP returns the temperature in tenths of degrees Kelvin */
+		*temp = deci_kelvin_to_millicelsius(tmp);
+
+	return 0;
+}
+
+static int int340x_thermal_get_trip_temp(struct thermal_zone_device *zone,
+					 int trip, int *temp)
+{
+	struct int34x_thermal_zone *d = zone->devdata;
+	int i, ret = 0;
+
+	if (d->override_ops && d->override_ops->get_trip_temp)
+		return d->override_ops->get_trip_temp(zone, trip, temp);
+
+	mutex_lock(&d->trip_mutex);
+
+	if (trip < d->aux_trip_nr)
+		*temp = d->aux_trips[trip];
+	else if (trip == d->crt_trip_id)
+		*temp = d->crt_temp;
+	else if (trip == d->psv_trip_id)
+		*temp = d->psv_temp;
+	else if (trip == d->hot_trip_id)
+		*temp = d->hot_temp;
+	else {
+		for (i = 0; i < INT340X_THERMAL_MAX_ACT_TRIP_COUNT; i++) {
+			if (d->act_trips[i].valid &&
+			    d->act_trips[i].id == trip) {
+				*temp = d->act_trips[i].temp;
+				break;
+			}
+		}
+		if (i == INT340X_THERMAL_MAX_ACT_TRIP_COUNT)
+			ret = -EINVAL;
+	}
+
+	mutex_unlock(&d->trip_mutex);
+
+	return ret;
+}
+
+static int int340x_thermal_get_trip_type(struct thermal_zone_device *zone,
+					 int trip,
+					 enum thermal_trip_type *type)
+{
+	struct int34x_thermal_zone *d = zone->devdata;
+	int i, ret = 0;
+
+	if (d->override_ops && d->override_ops->get_trip_type)
+		return d->override_ops->get_trip_type(zone, trip, type);
+
+	mutex_lock(&d->trip_mutex);
+
+	if (trip < d->aux_trip_nr)
+		*type = THERMAL_TRIP_PASSIVE;
+	else if (trip == d->crt_trip_id)
+		*type = THERMAL_TRIP_CRITICAL;
+	else if (trip == d->hot_trip_id)
+		*type = THERMAL_TRIP_HOT;
+	else if (trip == d->psv_trip_id)
+		*type = THERMAL_TRIP_PASSIVE;
+	else {
+		for (i = 0; i < INT340X_THERMAL_MAX_ACT_TRIP_COUNT; i++) {
+			if (d->act_trips[i].valid &&
+			    d->act_trips[i].id == trip) {
+				*type = THERMAL_TRIP_ACTIVE;
+				break;
+			}
+		}
+		if (i == INT340X_THERMAL_MAX_ACT_TRIP_COUNT)
+			ret = -EINVAL;
+	}
+
+	mutex_unlock(&d->trip_mutex);
+
+	return ret;
+}
+
+static int int340x_thermal_set_trip_temp(struct thermal_zone_device *zone,
+				      int trip, int temp)
+{
+	struct int34x_thermal_zone *d = zone->devdata;
+	acpi_status status;
+	char name[10];
+
+	if (d->override_ops && d->override_ops->set_trip_temp)
+		return d->override_ops->set_trip_temp(zone, trip, temp);
+
+	snprintf(name, sizeof(name), "PAT%d", trip);
+	status = acpi_execute_simple_method(d->adev->handle, name,
+			millicelsius_to_deci_kelvin(temp));
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	d->aux_trips[trip] = temp;
+
+	return 0;
+}
+
+
+static int int340x_thermal_get_trip_hyst(struct thermal_zone_device *zone,
+		int trip, int *temp)
+{
+	struct int34x_thermal_zone *d = zone->devdata;
+	acpi_status status;
+	unsigned long long hyst;
+
+	if (d->override_ops && d->override_ops->get_trip_hyst)
+		return d->override_ops->get_trip_hyst(zone, trip, temp);
+
+	status = acpi_evaluate_integer(d->adev->handle, "GTSH", NULL, &hyst);
+	if (ACPI_FAILURE(status))
+		*temp = 0;
+	else
+		*temp = hyst * 100;
+
+	return 0;
+}
+
+static void int340x_thermal_critical(struct thermal_zone_device *zone)
+{
+	dev_dbg(&zone->device, "%s: critical temperature reached\n", zone->type);
+}
+
+static struct thermal_zone_device_ops int340x_thermal_zone_ops = {
+	.get_temp       = int340x_thermal_get_zone_temp,
+	.get_trip_temp	= int340x_thermal_get_trip_temp,
+	.get_trip_type	= int340x_thermal_get_trip_type,
+	.set_trip_temp	= int340x_thermal_set_trip_temp,
+	.get_trip_hyst =  int340x_thermal_get_trip_hyst,
+	.critical	= int340x_thermal_critical,
+};
+
+static int int340x_thermal_get_trip_config(acpi_handle handle, char *name,
+				      int *temp)
+{
+	unsigned long long r;
+	acpi_status status;
+
+	status = acpi_evaluate_integer(handle, name, NULL, &r);
+	if (ACPI_FAILURE(status))
+		return -EIO;
+
+	*temp = deci_kelvin_to_millicelsius(r);
+
+	return 0;
+}
+
+int int340x_thermal_read_trips(struct int34x_thermal_zone *int34x_zone)
+{
+	int trip_cnt = int34x_zone->aux_trip_nr;
+	int i;
+
+	mutex_lock(&int34x_zone->trip_mutex);
+
+	int34x_zone->crt_trip_id = -1;
+	if (!int340x_thermal_get_trip_config(int34x_zone->adev->handle, "_CRT",
+					     &int34x_zone->crt_temp))
+		int34x_zone->crt_trip_id = trip_cnt++;
+
+	int34x_zone->hot_trip_id = -1;
+	if (!int340x_thermal_get_trip_config(int34x_zone->adev->handle, "_HOT",
+					     &int34x_zone->hot_temp))
+		int34x_zone->hot_trip_id = trip_cnt++;
+
+	int34x_zone->psv_trip_id = -1;
+	if (!int340x_thermal_get_trip_config(int34x_zone->adev->handle, "_PSV",
+					     &int34x_zone->psv_temp))
+		int34x_zone->psv_trip_id = trip_cnt++;
+
+	for (i = 0; i < INT340X_THERMAL_MAX_ACT_TRIP_COUNT; i++) {
+		char name[5] = { '_', 'A', 'C', '0' + i, '\0' };
+
+		if (int340x_thermal_get_trip_config(int34x_zone->adev->handle,
+					name,
+					&int34x_zone->act_trips[i].temp))
+			break;
+
+		int34x_zone->act_trips[i].id = trip_cnt++;
+		int34x_zone->act_trips[i].valid = true;
+	}
+
+	mutex_unlock(&int34x_zone->trip_mutex);
+
+	return trip_cnt;
+}
+EXPORT_SYMBOL_GPL(int340x_thermal_read_trips);
+
+static struct thermal_zone_params int340x_thermal_params = {
+	.governor_name = "user_space",
+	.no_hwmon = true,
+};
+
+struct int34x_thermal_zone *int340x_thermal_zone_add(struct acpi_device *adev,
+				struct thermal_zone_device_ops *override_ops)
+{
+	struct int34x_thermal_zone *int34x_thermal_zone;
+	acpi_status status;
+	unsigned long long trip_cnt;
+	int trip_mask = 0;
+	int ret;
+
+	int34x_thermal_zone = kzalloc(sizeof(*int34x_thermal_zone),
+				      GFP_KERNEL);
+	if (!int34x_thermal_zone)
+		return ERR_PTR(-ENOMEM);
+
+	mutex_init(&int34x_thermal_zone->trip_mutex);
+
+	int34x_thermal_zone->adev = adev;
+	int34x_thermal_zone->override_ops = override_ops;
+
+	status = acpi_evaluate_integer(adev->handle, "PATC", NULL, &trip_cnt);
+	if (ACPI_FAILURE(status))
+		trip_cnt = 0;
+	else {
+		int i;
+
+		int34x_thermal_zone->aux_trips =
+			kcalloc(trip_cnt,
+				sizeof(*int34x_thermal_zone->aux_trips),
+				GFP_KERNEL);
+		if (!int34x_thermal_zone->aux_trips) {
+			ret = -ENOMEM;
+			goto err_trip_alloc;
+		}
+		trip_mask = BIT(trip_cnt) - 1;
+		int34x_thermal_zone->aux_trip_nr = trip_cnt;
+		for (i = 0; i < trip_cnt; ++i)
+			int34x_thermal_zone->aux_trips[i] = THERMAL_TEMP_INVALID;
+	}
+
+	trip_cnt = int340x_thermal_read_trips(int34x_thermal_zone);
+
+	int34x_thermal_zone->lpat_table = acpi_lpat_get_conversion_table(
+								adev->handle);
+
+	int34x_thermal_zone->zone = thermal_zone_device_register(
+						acpi_device_bid(adev),
+						trip_cnt,
+						trip_mask, int34x_thermal_zone,
+						&int340x_thermal_zone_ops,
+						&int340x_thermal_params,
+						0, 0);
+	if (IS_ERR(int34x_thermal_zone->zone)) {
+		ret = PTR_ERR(int34x_thermal_zone->zone);
+		goto err_thermal_zone;
+	}
+	ret = thermal_zone_device_enable(int34x_thermal_zone->zone);
+	if (ret)
+		goto err_enable;
+
+	return int34x_thermal_zone;
+
+err_enable:
+	thermal_zone_device_unregister(int34x_thermal_zone->zone);
+err_thermal_zone:
+	acpi_lpat_free_conversion_table(int34x_thermal_zone->lpat_table);
+	kfree(int34x_thermal_zone->aux_trips);
+err_trip_alloc:
+	mutex_destroy(&int34x_thermal_zone->trip_mutex);
+	kfree(int34x_thermal_zone);
+	return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(int340x_thermal_zone_add);
+
+void int340x_thermal_zone_remove(struct int34x_thermal_zone
+				 *int34x_thermal_zone)
+{
+	thermal_zone_device_unregister(int34x_thermal_zone->zone);
+	acpi_lpat_free_conversion_table(int34x_thermal_zone->lpat_table);
+	kfree(int34x_thermal_zone->aux_trips);
+	mutex_destroy(&int34x_thermal_zone->trip_mutex);
+	kfree(int34x_thermal_zone);
+}
+EXPORT_SYMBOL_GPL(int340x_thermal_zone_remove);
+
+MODULE_AUTHOR("Aaron Lu <aaron.lu@intel.com>");
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_DESCRIPTION("Intel INT340x common thermal zone handler");
+MODULE_LICENSE("GPL v2");