Thermal: introduce int3403 thermal driver

ACPI INT3403 device object can be used to retrieve temperature date
from temperature sensors present in the system, and to expose
device' performance control.

The previous INT3403 thermal driver supports temperature reporting only,
thus remove it and introduce this new & enhanced one.

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

1 files changed, 0 insertions, 296 deletions

diff --git a/drivers/thermal/int3403_thermal.c b/drivers/thermal/int3403_thermal.c
deleted file mode 100644
index 17554ee..0000000
--- a/drivers/thermal/int3403_thermal.c
+++ /dev/null
@@ -1,296 +0,0 @@
-/*
- * ACPI INT3403 thermal driver
- * Copyright (c) 2013, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/acpi.h>
-#include <linux/thermal.h>
-
-#define INT3403_TYPE_SENSOR		0x03
-#define INT3403_PERF_CHANGED_EVENT	0x80
-#define INT3403_THERMAL_EVENT		0x90
-
-#define DECI_KELVIN_TO_MILLI_CELSIUS(t, off) (((t) - (off)) * 100)
-#define KELVIN_OFFSET	2732
-#define MILLI_CELSIUS_TO_DECI_KELVIN(t, off) (((t) / 100) + (off))
-
-#define ACPI_INT3403_CLASS		"int3403"
-#define ACPI_INT3403_FILE_STATE		"state"
-
-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,
-				unsigned long *temp)
-{
-	struct acpi_device *device = tzone->devdata;
-	unsigned long long tmp;
-	acpi_status status;
-
-	status = acpi_evaluate_integer(device->handle, "_TMP", NULL, &tmp);
-	if (ACPI_FAILURE(status))
-		return -EIO;
-
-	*temp = DECI_KELVIN_TO_MILLI_CELSIUS(tmp, KELVIN_OFFSET);
-
-	return 0;
-}
-
-static int sys_get_trip_hyst(struct thermal_zone_device *tzone,
-		int trip, unsigned long *temp)
-{
-	struct acpi_device *device = tzone->devdata;
-	unsigned long long hyst;
-	acpi_status status;
-
-	status = acpi_evaluate_integer(device->handle, "GTSH", NULL, &hyst);
-	if (ACPI_FAILURE(status))
-		return -EIO;
-
-	/*
-	 * Thermal hysteresis represents a temperature difference.
-	 * Kelvin and Celsius have same degree size. So the
-	 * conversion here between tenths of degree Kelvin unit
-	 * and Milli-Celsius unit is just to multiply 100.
-	 */
-	*temp = hyst * 100;
-
-	return 0;
-}
-
-static int sys_get_trip_temp(struct thermal_zone_device *tzone,
-		int trip, unsigned long *temp)
-{
-	struct acpi_device *device = tzone->devdata;
-	struct int3403_sensor *obj = acpi_driver_data(device);
-
-	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;
-}
-
-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 */
-	if (trip == obj->crit_trip_id)
-		*type = THERMAL_TRIP_CRITICAL;
-	else
-		*type = THERMAL_TRIP_PASSIVE;
-
-	return 0;
-}
-
-int sys_set_trip_temp(struct thermal_zone_device *tzone, int trip,
-							unsigned long temp)
-{
-	struct acpi_device *device = tzone->devdata;
-	acpi_status status;
-	char name[10];
-	int ret = 0;
-	struct int3403_sensor *obj = acpi_driver_data(device);
-
-	snprintf(name, sizeof(name), "PAT%d", trip);
-	if (acpi_has_method(device->handle, name)) {
-		status = acpi_execute_simple_method(device->handle, name,
-				MILLI_CELSIUS_TO_DECI_KELVIN(temp,
-							KELVIN_OFFSET));
-		if (ACPI_FAILURE(status))
-			ret = -EIO;
-		else
-			obj->thresholds[trip] = temp;
-	} else {
-		ret = -EIO;
-		dev_err(&device->dev, "sys_set_trip_temp: method not found\n");
-	}
-
-	return ret;
-}
-
-static struct thermal_zone_device_ops tzone_ops = {
-	.get_temp = sys_get_curr_temp,
-	.get_trip_temp = sys_get_trip_temp,
-	.get_trip_type = sys_get_trip_type,
-	.set_trip_temp = sys_set_trip_temp,
-	.get_trip_hyst =  sys_get_trip_hyst,
-};
-
-static void acpi_thermal_notify(struct acpi_device *device, u32 event)
-{
-	struct int3403_sensor *obj;
-
-	if (!device)
-		return;
-
-	obj = acpi_driver_data(device);
-	if (!obj)
-		return;
-
-	switch (event) {
-	case INT3403_PERF_CHANGED_EVENT:
-		break;
-	case INT3403_THERMAL_EVENT:
-		thermal_zone_device_update(obj->tzone);
-		break;
-	default:
-		dev_err(&device->dev, "Unsupported event [0x%x]\n", event);
-		break;
-	}
-}
-
-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;
-	unsigned long long ptyp;
-	acpi_status status;
-	struct int3403_sensor *obj;
-	unsigned long long trip_cnt;
-	int trip_mask = 0;
-
-	if (!device)
-		return -EINVAL;
-
-	status = acpi_evaluate_integer(device->handle, "PTYP", NULL, &ptyp);
-	if (ACPI_FAILURE(status))
-		return -EINVAL;
-
-	if (ptyp != INT3403_TYPE_SENSOR)
-		return -EINVAL;
-
-	obj = devm_kzalloc(&device->dev, sizeof(*obj), GFP_KERNEL);
-	if (!obj)
-		return -ENOMEM;
-
-	device->driver_data = obj;
-
-	status = acpi_evaluate_integer(device->handle, "PATC", NULL,
-						&trip_cnt);
-	if (ACPI_FAILURE(status))
-		trip_cnt = 0;
-
-	if (trip_cnt) {
-		/* We have to cache, thresholds can't be readback */
-		obj->thresholds = devm_kzalloc(&device->dev,
-					sizeof(*obj->thresholds) * trip_cnt,
-					GFP_KERNEL);
-		if (!obj->thresholds)
-			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);
-	if (IS_ERR(obj->tzone)) {
-		result = PTR_ERR(obj->tzone);
-		return result;
-	}
-
-	strcpy(acpi_device_name(device), "INT3403");
-	strcpy(acpi_device_class(device), ACPI_INT3403_CLASS);
-
-	return 0;
-}
-
-static int acpi_int3403_remove(struct acpi_device *device)
-{
-	struct int3403_sensor *obj;
-
-	obj = acpi_driver_data(device);
-	thermal_zone_device_unregister(obj->tzone);
-
-	return 0;
-}
-
-ACPI_MODULE_NAME("int3403");
-static const struct acpi_device_id int3403_device_ids[] = {
-	{"INT3403", 0},
-	{"", 0},
-};
-MODULE_DEVICE_TABLE(acpi, int3403_device_ids);
-
-static struct acpi_driver acpi_int3403_driver = {
-	.name = "INT3403",
-	.class = ACPI_INT3403_CLASS,
-	.ids = int3403_device_ids,
-	.ops = {
-		.add = acpi_int3403_add,
-		.remove = acpi_int3403_remove,
-		.notify = acpi_thermal_notify,
-		},
-};
-
-module_acpi_driver(acpi_int3403_driver);
-
-MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("ACPI INT3403 thermal driver");