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