+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Intel menlow Driver for thermal management extension
- *
- * Copyright (C) 2008 Intel Corp
- * Copyright (C) 2008 Sujith Thomas <sujith.thomas@intel.com>
- * Copyright (C) 2008 Zhang Rui <rui.zhang@intel.com>
- *
- * This driver creates the sys I/F for programming the sensors.
- * It also implements the driver for intel menlow memory controller (hardware
- * id is INT0002) which makes use of the platform specific ACPI methods
- * to get/set bandwidth.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/acpi.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/pm.h>
-#include <linux/slab.h>
-#include <linux/thermal.h>
-#include <linux/types.h>
-#include <linux/units.h>
-
-MODULE_AUTHOR("Thomas Sujith");
-MODULE_AUTHOR("Zhang Rui");
-MODULE_DESCRIPTION("Intel Menlow platform specific driver");
-MODULE_LICENSE("GPL v2");
-
-/*
- * Memory controller device control
- */
-
-#define MEMORY_GET_BANDWIDTH "GTHS"
-#define MEMORY_SET_BANDWIDTH "STHS"
-#define MEMORY_ARG_CUR_BANDWIDTH 1
-#define MEMORY_ARG_MAX_BANDWIDTH 0
-
-static void intel_menlow_unregister_sensor(void);
-
-/*
- * GTHS returning 'n' would mean that [0,n-1] states are supported
- * In that case max_cstate would be n-1
- * GTHS returning '0' would mean that no bandwidth control states are supported
- */
-static int memory_get_max_bandwidth(struct thermal_cooling_device *cdev,
- unsigned long *max_state)
-{
- struct acpi_device *device = cdev->devdata;
- acpi_handle handle = device->handle;
- unsigned long long value;
- struct acpi_object_list arg_list;
- union acpi_object arg;
- acpi_status status = AE_OK;
-
- arg_list.count = 1;
- arg_list.pointer = &arg;
- arg.type = ACPI_TYPE_INTEGER;
- arg.integer.value = MEMORY_ARG_MAX_BANDWIDTH;
- status = acpi_evaluate_integer(handle, MEMORY_GET_BANDWIDTH,
- &arg_list, &value);
- if (ACPI_FAILURE(status))
- return -EFAULT;
-
- if (!value)
- return -EINVAL;
-
- *max_state = value - 1;
- return 0;
-}
-
-static int memory_get_cur_bandwidth(struct thermal_cooling_device *cdev,
- unsigned long *value)
-{
- struct acpi_device *device = cdev->devdata;
- acpi_handle handle = device->handle;
- unsigned long long result;
- struct acpi_object_list arg_list;
- union acpi_object arg;
- acpi_status status = AE_OK;
-
- arg_list.count = 1;
- arg_list.pointer = &arg;
- arg.type = ACPI_TYPE_INTEGER;
- arg.integer.value = MEMORY_ARG_CUR_BANDWIDTH;
- status = acpi_evaluate_integer(handle, MEMORY_GET_BANDWIDTH,
- &arg_list, &result);
- if (ACPI_FAILURE(status))
- return -EFAULT;
-
- *value = result;
- return 0;
-}
-
-static int memory_set_cur_bandwidth(struct thermal_cooling_device *cdev,
- unsigned long state)
-{
- struct acpi_device *device = cdev->devdata;
- acpi_handle handle = device->handle;
- struct acpi_object_list arg_list;
- union acpi_object arg;
- acpi_status status;
- unsigned long long temp;
- unsigned long max_state;
-
- if (memory_get_max_bandwidth(cdev, &max_state))
- return -EFAULT;
-
- if (state > max_state)
- return -EINVAL;
-
- arg_list.count = 1;
- arg_list.pointer = &arg;
- arg.type = ACPI_TYPE_INTEGER;
- arg.integer.value = state;
-
- status =
- acpi_evaluate_integer(handle, MEMORY_SET_BANDWIDTH, &arg_list,
- &temp);
-
- pr_info("Bandwidth value was %ld: status is %d\n", state, status);
- if (ACPI_FAILURE(status))
- return -EFAULT;
-
- return 0;
-}
-
-static const struct thermal_cooling_device_ops memory_cooling_ops = {
- .get_max_state = memory_get_max_bandwidth,
- .get_cur_state = memory_get_cur_bandwidth,
- .set_cur_state = memory_set_cur_bandwidth,
-};
-
-/*
- * Memory Device Management
- */
-static int intel_menlow_memory_add(struct acpi_device *device)
-{
- int result = -ENODEV;
- struct thermal_cooling_device *cdev;
-
- if (!device)
- return -EINVAL;
-
- if (!acpi_has_method(device->handle, MEMORY_GET_BANDWIDTH))
- goto end;
-
- if (!acpi_has_method(device->handle, MEMORY_SET_BANDWIDTH))
- goto end;
-
- cdev = thermal_cooling_device_register("Memory controller", device,
- &memory_cooling_ops);
- if (IS_ERR(cdev)) {
- result = PTR_ERR(cdev);
- goto end;
- }
-
- device->driver_data = cdev;
- result = sysfs_create_link(&device->dev.kobj,
- &cdev->device.kobj, "thermal_cooling");
- if (result)
- goto unregister;
-
- result = sysfs_create_link(&cdev->device.kobj,
- &device->dev.kobj, "device");
- if (result) {
- sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
- goto unregister;
- }
-
- end:
- return result;
-
- unregister:
- thermal_cooling_device_unregister(cdev);
- return result;
-
-}
-
-static void intel_menlow_memory_remove(struct acpi_device *device)
-{
- struct thermal_cooling_device *cdev;
-
- if (!device)
- return;
-
- cdev = acpi_driver_data(device);
- if (!cdev)
- return;
-
- sysfs_remove_link(&device->dev.kobj, "thermal_cooling");
- sysfs_remove_link(&cdev->device.kobj, "device");
- thermal_cooling_device_unregister(cdev);
-}
-
-static const struct acpi_device_id intel_menlow_memory_ids[] = {
- {"INT0002", 0},
- {"", 0},
-};
-
-static struct acpi_driver intel_menlow_memory_driver = {
- .name = "intel_menlow_thermal_control",
- .ids = intel_menlow_memory_ids,
- .ops = {
- .add = intel_menlow_memory_add,
- .remove = intel_menlow_memory_remove,
- },
-};
-
-/*
- * Sensor control on menlow platform
- */
-
-#define THERMAL_AUX0 0
-#define THERMAL_AUX1 1
-#define GET_AUX0 "GAX0"
-#define GET_AUX1 "GAX1"
-#define SET_AUX0 "SAX0"
-#define SET_AUX1 "SAX1"
-
-struct intel_menlow_attribute {
- struct device_attribute attr;
- struct device *device;
- acpi_handle handle;
- struct list_head node;
-};
-
-static LIST_HEAD(intel_menlow_attr_list);
-static DEFINE_MUTEX(intel_menlow_attr_lock);
-
-/*
- * sensor_get_auxtrip - get the current auxtrip value from sensor
- * @handle: Object handle
- * @index : GET_AUX1/GET_AUX0
- * @value : The address will be fill by the value
- */
-static int sensor_get_auxtrip(acpi_handle handle, int index,
- unsigned long long *value)
-{
- acpi_status status;
-
- if ((index != 0 && index != 1) || !value)
- return -EINVAL;
-
- status = acpi_evaluate_integer(handle, index ? GET_AUX1 : GET_AUX0,
- NULL, value);
- if (ACPI_FAILURE(status))
- return -EIO;
-
- return 0;
-}
-
-/*
- * sensor_set_auxtrip - set the new auxtrip value to sensor
- * @handle: Object handle
- * @index : GET_AUX1/GET_AUX0
- * @value : The value will be set
- */
-static int sensor_set_auxtrip(acpi_handle handle, int index, int value)
-{
- acpi_status status;
- union acpi_object arg = {
- ACPI_TYPE_INTEGER
- };
- struct acpi_object_list args = {
- 1, &arg
- };
- unsigned long long temp;
-
- if (index != 0 && index != 1)
- return -EINVAL;
-
- status = acpi_evaluate_integer(handle, index ? GET_AUX0 : GET_AUX1,
- NULL, &temp);
- if (ACPI_FAILURE(status))
- return -EIO;
- if ((index && value < temp) || (!index && value > temp))
- return -EINVAL;
-
- arg.integer.value = value;
- status = acpi_evaluate_integer(handle, index ? SET_AUX1 : SET_AUX0,
- &args, &temp);
- if (ACPI_FAILURE(status))
- return -EIO;
-
- /* do we need to check the return value of SAX0/SAX1 ? */
-
- return 0;
-}
-
-#define to_intel_menlow_attr(_attr) \
- container_of(_attr, struct intel_menlow_attribute, attr)
-
-static ssize_t aux_show(struct device *dev, struct device_attribute *dev_attr,
- char *buf, int idx)
-{
- struct intel_menlow_attribute *attr = to_intel_menlow_attr(dev_attr);
- unsigned long long value;
- int result;
-
- result = sensor_get_auxtrip(attr->handle, idx, &value);
- if (result)
- return result;
-
- return sprintf(buf, "%lu", deci_kelvin_to_celsius(value));
-}
-
-static ssize_t aux0_show(struct device *dev,
- struct device_attribute *dev_attr, char *buf)
-{
- return aux_show(dev, dev_attr, buf, 0);
-}
-
-static ssize_t aux1_show(struct device *dev,
- struct device_attribute *dev_attr, char *buf)
-{
- return aux_show(dev, dev_attr, buf, 1);
-}
-
-static ssize_t aux_store(struct device *dev, struct device_attribute *dev_attr,
- const char *buf, size_t count, int idx)
-{
- struct intel_menlow_attribute *attr = to_intel_menlow_attr(dev_attr);
- int value;
- int result;
-
- /*Sanity check; should be a positive integer */
- if (!sscanf(buf, "%d", &value))
- return -EINVAL;
-
- if (value < 0)
- return -EINVAL;
-
- result = sensor_set_auxtrip(attr->handle, idx,
- celsius_to_deci_kelvin(value));
- return result ? result : count;
-}
-
-static ssize_t aux0_store(struct device *dev,
- struct device_attribute *dev_attr,
- const char *buf, size_t count)
-{
- return aux_store(dev, dev_attr, buf, count, 0);
-}
-
-static ssize_t aux1_store(struct device *dev,
- struct device_attribute *dev_attr,
- const char *buf, size_t count)
-{
- return aux_store(dev, dev_attr, buf, count, 1);
-}
-
-/* BIOS can enable/disable the thermal user application in dabney platform */
-#define BIOS_ENABLED "\\_TZ.GSTS"
-static ssize_t bios_enabled_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- acpi_status status;
- unsigned long long bios_enabled;
-
- status = acpi_evaluate_integer(NULL, BIOS_ENABLED, NULL, &bios_enabled);
- if (ACPI_FAILURE(status))
- return -ENODEV;
-
- return sprintf(buf, "%s\n", bios_enabled ? "enabled" : "disabled");
-}
-
-static int intel_menlow_add_one_attribute(char *name, umode_t mode, void *show,
- void *store, struct device *dev,
- acpi_handle handle)
-{
- struct intel_menlow_attribute *attr;
- int result;
-
- attr = kzalloc(sizeof(struct intel_menlow_attribute), GFP_KERNEL);
- if (!attr)
- return -ENOMEM;
-
- sysfs_attr_init(&attr->attr.attr); /* That is consistent naming :D */
- attr->attr.attr.name = name;
- attr->attr.attr.mode = mode;
- attr->attr.show = show;
- attr->attr.store = store;
- attr->device = dev;
- attr->handle = handle;
-
- result = device_create_file(dev, &attr->attr);
- if (result) {
- kfree(attr);
- return result;
- }
-
- mutex_lock(&intel_menlow_attr_lock);
- list_add_tail(&attr->node, &intel_menlow_attr_list);
- mutex_unlock(&intel_menlow_attr_lock);
-
- return 0;
-}
-
-static acpi_status intel_menlow_register_sensor(acpi_handle handle, u32 lvl,
- void *context, void **rv)
-{
- acpi_status status;
- acpi_handle dummy;
- struct thermal_zone_device *thermal;
- int result;
-
- result = acpi_bus_get_private_data(handle, (void **)&thermal);
- if (result)
- return 0;
-
- /* _TZ must have the AUX0/1 methods */
- status = acpi_get_handle(handle, GET_AUX0, &dummy);
- if (ACPI_FAILURE(status))
- return (status == AE_NOT_FOUND) ? AE_OK : status;
-
- status = acpi_get_handle(handle, SET_AUX0, &dummy);
- if (ACPI_FAILURE(status))
- return (status == AE_NOT_FOUND) ? AE_OK : status;
-
- result = intel_menlow_add_one_attribute("aux0", 0644,
- aux0_show, aux0_store,
- &thermal->device, handle);
- if (result)
- return AE_ERROR;
-
- status = acpi_get_handle(handle, GET_AUX1, &dummy);
- if (ACPI_FAILURE(status))
- goto aux1_not_found;
-
- status = acpi_get_handle(handle, SET_AUX1, &dummy);
- if (ACPI_FAILURE(status))
- goto aux1_not_found;
-
- result = intel_menlow_add_one_attribute("aux1", 0644,
- aux1_show, aux1_store,
- &thermal->device, handle);
- if (result) {
- intel_menlow_unregister_sensor();
- return AE_ERROR;
- }
-
- /*
- * create the "dabney_enabled" attribute which means the user app
- * should be loaded or not
- */
-
- result = intel_menlow_add_one_attribute("bios_enabled", 0444,
- bios_enabled_show, NULL,
- &thermal->device, handle);
- if (result) {
- intel_menlow_unregister_sensor();
- return AE_ERROR;
- }
-
- return AE_OK;
-
- aux1_not_found:
- if (status == AE_NOT_FOUND)
- return AE_OK;
-
- intel_menlow_unregister_sensor();
- return status;
-}
-
-static void intel_menlow_unregister_sensor(void)
-{
- struct intel_menlow_attribute *pos, *next;
-
- mutex_lock(&intel_menlow_attr_lock);
- list_for_each_entry_safe(pos, next, &intel_menlow_attr_list, node) {
- list_del(&pos->node);
- device_remove_file(pos->device, &pos->attr);
- kfree(pos);
- }
- mutex_unlock(&intel_menlow_attr_lock);
-
- return;
-}
-
-static int __init intel_menlow_module_init(void)
-{
- int result = -ENODEV;
- acpi_status status;
- unsigned long long enable;
-
- if (acpi_disabled)
- return result;
-
- /* Looking for the \_TZ.GSTS method */
- status = acpi_evaluate_integer(NULL, BIOS_ENABLED, NULL, &enable);
- if (ACPI_FAILURE(status) || !enable)
- return -ENODEV;
-
- /* Looking for ACPI device MEM0 with hardware id INT0002 */
- result = acpi_bus_register_driver(&intel_menlow_memory_driver);
- if (result)
- return result;
-
- /* Looking for sensors in each ACPI thermal zone */
- status = acpi_walk_namespace(ACPI_TYPE_THERMAL, ACPI_ROOT_OBJECT,
- ACPI_UINT32_MAX,
- intel_menlow_register_sensor, NULL, NULL, NULL);
- if (ACPI_FAILURE(status)) {
- acpi_bus_unregister_driver(&intel_menlow_memory_driver);
- return -ENODEV;
- }
-
- return 0;
-}
-
-static void __exit intel_menlow_module_exit(void)
-{
- acpi_bus_unregister_driver(&intel_menlow_memory_driver);
- intel_menlow_unregister_sensor();
-}
-
-module_init(intel_menlow_module_init);
-module_exit(intel_menlow_module_exit);
/* The calibration coefficient of sensor */
#define MT8173_CALIBRATION 165
+/* Valid temperatures range */
+#define MT8173_TEMP_MIN -20000
+#define MT8173_TEMP_MAX 150000
+
/*
* Layout of the fuses providing the calibration data
* These macros could be used for MT8183, MT8173, MT2701, and MT2712.
.version = MTK_THERMAL_V3,
};
+static bool mtk_thermal_temp_is_valid(int temp)
+{
+ return (temp >= MT8173_TEMP_MIN) && (temp <= MT8173_TEMP_MAX);
+}
+
/**
* raw_to_mcelsius_v1 - convert a raw ADC value to mcelsius
* @mt: The thermal controller
temp = mt->raw_to_mcelsius(
mt, conf->bank_data[bank->id].sensors[i], raw);
+ /*
+ * Depending on the filt/sen intervals and ADC polling time,
+ * we may need up to 60 milliseconds after initialization: this
+ * will result in the first reading containing an out of range
+ * temperature value.
+ * Validate the reading to both address the aforementioned issue
+ * and to eventually avoid bogus readings during runtime in the
+ * event that the AUXADC gets unstable due to high EMI, etc.
+ */
+ if (!mtk_thermal_temp_is_valid(temp))
+ temp = THERMAL_TEMP_INVALID;
if (temp > max)
max = temp;
static u64 of_get_phys_base(struct device_node *np)
{
- u64 size64;
- const __be32 *regaddr_p;
+ struct resource res;
- regaddr_p = of_get_address(np, 0, &size64, NULL);
- if (!regaddr_p)
+ if (of_address_to_resource(np, 0, &res))
return OF_BAD_ADDR;
- return of_translate_address(np, regaddr_p);
+ return res.start;
}
static int mtk_thermal_extract_efuse_v1(struct mtk_thermal *mt, u32 *buf)
mt->conf = of_device_get_match_data(&pdev->dev);
- mt->clk_peri_therm = devm_clk_get(&pdev->dev, "therm");
- if (IS_ERR(mt->clk_peri_therm))
- return PTR_ERR(mt->clk_peri_therm);
-
- mt->clk_auxadc = devm_clk_get(&pdev->dev, "auxadc");
- if (IS_ERR(mt->clk_auxadc))
- return PTR_ERR(mt->clk_auxadc);
-
mt->thermal_base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
if (IS_ERR(mt->thermal_base))
return PTR_ERR(mt->thermal_base);
return -ENODEV;
}
- auxadc_base = of_iomap(auxadc, 0);
+ auxadc_base = devm_of_iomap(&pdev->dev, auxadc, 0, NULL);
+ if (IS_ERR(auxadc_base)) {
+ of_node_put(auxadc);
+ return PTR_ERR(auxadc_base);
+ }
+
auxadc_phys_base = of_get_phys_base(auxadc);
of_node_put(auxadc);
return -ENODEV;
}
- apmixed_base = of_iomap(apmixedsys, 0);
+ apmixed_base = devm_of_iomap(&pdev->dev, apmixedsys, 0, NULL);
+ if (IS_ERR(apmixed_base)) {
+ of_node_put(apmixedsys);
+ return PTR_ERR(apmixed_base);
+ }
+
apmixed_phys_base = of_get_phys_base(apmixedsys);
of_node_put(apmixedsys);
if (ret)
return ret;
- ret = clk_prepare_enable(mt->clk_auxadc);
- if (ret) {
+ mt->clk_auxadc = devm_clk_get_enabled(&pdev->dev, "auxadc");
+ if (IS_ERR(mt->clk_auxadc)) {
+ ret = PTR_ERR(mt->clk_auxadc);
dev_err(&pdev->dev, "Can't enable auxadc clk: %d\n", ret);
return ret;
}
- ret = clk_prepare_enable(mt->clk_peri_therm);
- if (ret) {
+ mt->clk_peri_therm = devm_clk_get_enabled(&pdev->dev, "therm");
+ if (IS_ERR(mt->clk_peri_therm)) {
+ ret = PTR_ERR(mt->clk_peri_therm);
dev_err(&pdev->dev, "Can't enable peri clk: %d\n", ret);
- goto err_disable_clk_auxadc;
+ return ret;
}
mtk_thermal_turn_on_buffer(mt, apmixed_base);
platform_set_drvdata(pdev, mt);
- /* Delay for thermal banks to be ready */
- msleep(30);
-
tzdev = devm_thermal_of_zone_register(&pdev->dev, 0, mt,
&mtk_thermal_ops);
- if (IS_ERR(tzdev)) {
- ret = PTR_ERR(tzdev);
- goto err_disable_clk_peri_therm;
- }
+ if (IS_ERR(tzdev))
+ return PTR_ERR(tzdev);
ret = devm_thermal_add_hwmon_sysfs(&pdev->dev, tzdev);
if (ret)
dev_warn(&pdev->dev, "error in thermal_add_hwmon_sysfs");
return 0;
-
-err_disable_clk_peri_therm:
- clk_disable_unprepare(mt->clk_peri_therm);
-err_disable_clk_auxadc:
- clk_disable_unprepare(mt->clk_auxadc);
-
- return ret;
-}
-
-static int mtk_thermal_remove(struct platform_device *pdev)
-{
- struct mtk_thermal *mt = platform_get_drvdata(pdev);
-
- clk_disable_unprepare(mt->clk_peri_therm);
- clk_disable_unprepare(mt->clk_auxadc);
-
- return 0;
}
static struct platform_driver mtk_thermal_driver = {
.probe = mtk_thermal_probe,
- .remove = mtk_thermal_remove,
.driver = {
.name = "mtk-thermal",
.of_match_table = mtk_thermal_of_match,
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