308 lines
6.6 KiB
C
308 lines
6.6 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* ACPI INT3403 thermal driver
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* Copyright (c) 2013, 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/types.h>
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#include <linux/acpi.h>
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#include <linux/thermal.h>
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#include <linux/platform_device.h>
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#include "int340x_thermal_zone.h"
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#define INT3403_TYPE_SENSOR 0x03
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#define INT3403_TYPE_CHARGER 0x0B
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#define INT3403_TYPE_BATTERY 0x0C
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#define INT3403_PERF_CHANGED_EVENT 0x80
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#define INT3403_PERF_TRIP_POINT_CHANGED 0x81
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#define INT3403_THERMAL_EVENT 0x90
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/* Preserved structure for future expandbility */
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struct int3403_sensor {
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struct int34x_thermal_zone *int340x_zone;
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};
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struct int3403_performance_state {
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u64 performance;
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u64 power;
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u64 latency;
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u64 linear;
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u64 control;
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u64 raw_performace;
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char *raw_unit;
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int reserved;
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};
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struct int3403_cdev {
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struct thermal_cooling_device *cdev;
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unsigned long max_state;
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};
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struct int3403_priv {
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struct platform_device *pdev;
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struct acpi_device *adev;
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unsigned long long type;
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void *priv;
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};
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static void int3403_notify(acpi_handle handle,
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u32 event, void *data)
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{
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struct int3403_priv *priv = data;
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struct int3403_sensor *obj;
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if (!priv)
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return;
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obj = priv->priv;
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if (priv->type != INT3403_TYPE_SENSOR || !obj)
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return;
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switch (event) {
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case INT3403_PERF_CHANGED_EVENT:
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break;
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case INT3403_THERMAL_EVENT:
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int340x_thermal_zone_device_update(obj->int340x_zone,
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THERMAL_TRIP_VIOLATED);
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break;
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case INT3403_PERF_TRIP_POINT_CHANGED:
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int340x_thermal_update_trips(obj->int340x_zone);
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int340x_thermal_zone_device_update(obj->int340x_zone,
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THERMAL_TRIP_CHANGED);
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break;
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default:
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dev_dbg(&priv->pdev->dev, "Unsupported event [0x%x]\n", event);
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break;
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}
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}
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static int int3403_sensor_add(struct int3403_priv *priv)
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{
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int result = 0;
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struct int3403_sensor *obj;
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obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
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if (!obj)
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return -ENOMEM;
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priv->priv = obj;
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obj->int340x_zone = int340x_thermal_zone_add(priv->adev, NULL);
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if (IS_ERR(obj->int340x_zone))
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return PTR_ERR(obj->int340x_zone);
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result = acpi_install_notify_handler(priv->adev->handle,
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ACPI_DEVICE_NOTIFY, int3403_notify,
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(void *)priv);
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if (result)
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goto err_free_obj;
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return 0;
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err_free_obj:
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int340x_thermal_zone_remove(obj->int340x_zone);
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return result;
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}
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static int int3403_sensor_remove(struct int3403_priv *priv)
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{
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struct int3403_sensor *obj = priv->priv;
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acpi_remove_notify_handler(priv->adev->handle,
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ACPI_DEVICE_NOTIFY, int3403_notify);
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int340x_thermal_zone_remove(obj->int340x_zone);
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return 0;
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}
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/* INT3403 Cooling devices */
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static int int3403_get_max_state(struct thermal_cooling_device *cdev,
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unsigned long *state)
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{
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struct int3403_priv *priv = cdev->devdata;
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struct int3403_cdev *obj = priv->priv;
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*state = obj->max_state;
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return 0;
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}
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static int int3403_get_cur_state(struct thermal_cooling_device *cdev,
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unsigned long *state)
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{
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struct int3403_priv *priv = cdev->devdata;
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unsigned long long level;
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acpi_status status;
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status = acpi_evaluate_integer(priv->adev->handle, "PPPC", NULL, &level);
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if (ACPI_SUCCESS(status)) {
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*state = level;
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return 0;
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} else
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return -EINVAL;
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}
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static int
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int3403_set_cur_state(struct thermal_cooling_device *cdev, unsigned long state)
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{
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struct int3403_priv *priv = cdev->devdata;
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acpi_status status;
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status = acpi_execute_simple_method(priv->adev->handle, "SPPC", state);
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if (ACPI_SUCCESS(status))
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return 0;
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else
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return -EINVAL;
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}
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static const struct thermal_cooling_device_ops int3403_cooling_ops = {
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.get_max_state = int3403_get_max_state,
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.get_cur_state = int3403_get_cur_state,
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.set_cur_state = int3403_set_cur_state,
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};
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static int int3403_cdev_add(struct int3403_priv *priv)
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{
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int result = 0;
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acpi_status status;
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struct int3403_cdev *obj;
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struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
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union acpi_object *p;
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obj = devm_kzalloc(&priv->pdev->dev, sizeof(*obj), GFP_KERNEL);
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if (!obj)
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return -ENOMEM;
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status = acpi_evaluate_object(priv->adev->handle, "PPSS", NULL, &buf);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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p = buf.pointer;
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if (!p || (p->type != ACPI_TYPE_PACKAGE)) {
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pr_warn("Invalid PPSS data\n");
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kfree(buf.pointer);
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return -EFAULT;
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}
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priv->priv = obj;
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obj->max_state = p->package.count - 1;
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obj->cdev =
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thermal_cooling_device_register(acpi_device_bid(priv->adev),
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priv, &int3403_cooling_ops);
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if (IS_ERR(obj->cdev))
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result = PTR_ERR(obj->cdev);
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kfree(buf.pointer);
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/* TODO: add ACPI notification support */
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return result;
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}
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static int int3403_cdev_remove(struct int3403_priv *priv)
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{
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struct int3403_cdev *obj = priv->priv;
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thermal_cooling_device_unregister(obj->cdev);
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return 0;
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}
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static int int3403_add(struct platform_device *pdev)
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{
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struct int3403_priv *priv;
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int result = 0;
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unsigned long long tmp;
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acpi_status status;
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priv = devm_kzalloc(&pdev->dev, sizeof(struct int3403_priv),
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GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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priv->pdev = pdev;
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priv->adev = ACPI_COMPANION(&(pdev->dev));
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if (!priv->adev) {
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result = -EINVAL;
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goto err;
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}
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status = acpi_evaluate_integer(priv->adev->handle, "_TMP",
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NULL, &tmp);
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if (ACPI_FAILURE(status)) {
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status = acpi_evaluate_integer(priv->adev->handle, "PTYP",
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NULL, &priv->type);
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if (ACPI_FAILURE(status)) {
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result = -EINVAL;
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goto err;
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}
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} else {
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priv->type = INT3403_TYPE_SENSOR;
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}
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platform_set_drvdata(pdev, priv);
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switch (priv->type) {
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case INT3403_TYPE_SENSOR:
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result = int3403_sensor_add(priv);
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break;
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case INT3403_TYPE_CHARGER:
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case INT3403_TYPE_BATTERY:
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result = int3403_cdev_add(priv);
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break;
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default:
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result = -EINVAL;
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}
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if (result)
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goto err;
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return result;
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err:
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return result;
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}
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static int int3403_remove(struct platform_device *pdev)
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{
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struct int3403_priv *priv = platform_get_drvdata(pdev);
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switch (priv->type) {
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case INT3403_TYPE_SENSOR:
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int3403_sensor_remove(priv);
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break;
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case INT3403_TYPE_CHARGER:
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case INT3403_TYPE_BATTERY:
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int3403_cdev_remove(priv);
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break;
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default:
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break;
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}
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return 0;
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}
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static const struct acpi_device_id int3403_device_ids[] = {
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{"INT3403", 0},
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{"INTC1043", 0},
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{"INTC1046", 0},
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{"INTC1062", 0},
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{"INTC10A1", 0},
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{"", 0},
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};
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MODULE_DEVICE_TABLE(acpi, int3403_device_ids);
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static struct platform_driver int3403_driver = {
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.probe = int3403_add,
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.remove = int3403_remove,
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.driver = {
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.name = "int3403 thermal",
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.acpi_match_table = int3403_device_ids,
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},
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};
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module_platform_driver(int3403_driver);
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MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("ACPI INT3403 thermal driver");
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