drivers/thermal/int340x_thermal/processor_thermal_device.c - arm/linux - Git at Google

 /*
  * processor_thermal_device.c
  * Copyright (c) 2014, 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/pci.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 #include <linux/acpi.h>
 #include <linux/thermal.h>
 #include "int340x_thermal_zone.h"
 #include "../intel_soc_dts_iosf.h"

 /* Broadwell-U/HSB thermal reporting device */
 #define PCI_DEVICE_ID_PROC_BDW_THERMAL	0x1603
 #define PCI_DEVICE_ID_PROC_HSB_THERMAL	0x0A03

 /* Skylake thermal reporting device */
 #define PCI_DEVICE_ID_PROC_SKL_THERMAL	0x1903

 /* Braswell thermal reporting device */
 #define PCI_DEVICE_ID_PROC_BSW_THERMAL	0x22DC

 struct power_config {
 	u32	index;
 	u32	min_uw;
 	u32	max_uw;
 	u32	tmin_us;
 	u32	tmax_us;
 	u32	step_uw;
 };

 struct proc_thermal_device {
 	struct device *dev;
 	struct acpi_device *adev;
 	struct power_config power_limits[2];
 	struct int34x_thermal_zone *int340x_zone;
 	struct intel_soc_dts_sensors *soc_dts;
 };

 enum proc_thermal_emum_mode_type {
 	PROC_THERMAL_NONE,
 	PROC_THERMAL_PCI,
 	PROC_THERMAL_PLATFORM_DEV
 };

 /*
  * We can have only one type of enumeration, PCI or Platform,
  * not both. So we don't need instance specific data.
  */
 static enum proc_thermal_emum_mode_type proc_thermal_emum_mode =
 							PROC_THERMAL_NONE;

 #define POWER_LIMIT_SHOW(index, suffix) \
 static ssize_t power_limit_##index##_##suffix##_show(struct device *dev, \
 					struct device_attribute *attr, \
 					char *buf) \
 { \
 	struct pci_dev *pci_dev; \
 	struct platform_device *pdev; \
 	struct proc_thermal_device *proc_dev; \
 \
 	if (proc_thermal_emum_mode == PROC_THERMAL_PLATFORM_DEV) { \
 		pdev = to_platform_device(dev); \
 		proc_dev = platform_get_drvdata(pdev); \
 	} else { \
 		pci_dev = to_pci_dev(dev); \
 		proc_dev = pci_get_drvdata(pci_dev); \
 	} \
 	return sprintf(buf, "%lu\n",\
 	(unsigned long)proc_dev->power_limits[index].suffix * 1000); \
 }

 POWER_LIMIT_SHOW(0, min_uw)
 POWER_LIMIT_SHOW(0, max_uw)
 POWER_LIMIT_SHOW(0, step_uw)
 POWER_LIMIT_SHOW(0, tmin_us)
 POWER_LIMIT_SHOW(0, tmax_us)

 POWER_LIMIT_SHOW(1, min_uw)
 POWER_LIMIT_SHOW(1, max_uw)
 POWER_LIMIT_SHOW(1, step_uw)
 POWER_LIMIT_SHOW(1, tmin_us)
 POWER_LIMIT_SHOW(1, tmax_us)

 static DEVICE_ATTR_RO(power_limit_0_min_uw);
 static DEVICE_ATTR_RO(power_limit_0_max_uw);
 static DEVICE_ATTR_RO(power_limit_0_step_uw);
 static DEVICE_ATTR_RO(power_limit_0_tmin_us);
 static DEVICE_ATTR_RO(power_limit_0_tmax_us);

 static DEVICE_ATTR_RO(power_limit_1_min_uw);
 static DEVICE_ATTR_RO(power_limit_1_max_uw);
 static DEVICE_ATTR_RO(power_limit_1_step_uw);
 static DEVICE_ATTR_RO(power_limit_1_tmin_us);
 static DEVICE_ATTR_RO(power_limit_1_tmax_us);

 static struct attribute *power_limit_attrs[] = {
 	&dev_attr_power_limit_0_min_uw.attr,
 	&dev_attr_power_limit_1_min_uw.attr,
 	&dev_attr_power_limit_0_max_uw.attr,
 	&dev_attr_power_limit_1_max_uw.attr,
 	&dev_attr_power_limit_0_step_uw.attr,
 	&dev_attr_power_limit_1_step_uw.attr,
 	&dev_attr_power_limit_0_tmin_us.attr,
 	&dev_attr_power_limit_1_tmin_us.attr,
 	&dev_attr_power_limit_0_tmax_us.attr,
 	&dev_attr_power_limit_1_tmax_us.attr,
 	NULL
 };

 static struct attribute_group power_limit_attribute_group = {
 	.attrs = power_limit_attrs,
 	.name = "power_limits"
 };

 static int stored_tjmax; /* since it is fixed, we can have local storage */

 static int get_tjmax(void)
 {
 	u32 eax, edx;
 	u32 val;
 	int err;

 	err = rdmsr_safe(MSR_IA32_TEMPERATURE_TARGET, &eax, &edx);
 	if (err)
 		return err;

 	val = (eax >> 16) & 0xff;
 	if (val)
 		return val;

 	return -EINVAL;
 }

 static int read_temp_msr(int *temp)
 {
 	int cpu;
 	u32 eax, edx;
 	int err;
 	unsigned long curr_temp_off = 0;

 	*temp = 0;

 	for_each_online_cpu(cpu) {
 		err = rdmsr_safe_on_cpu(cpu, MSR_IA32_THERM_STATUS, &eax,
 					&edx);
 		if (err)
 			goto err_ret;
 		else {
 			if (eax & 0x80000000) {
 				curr_temp_off = (eax >> 16) & 0x7f;
 				if (!*temp || curr_temp_off < *temp)
 					*temp = curr_temp_off;
 			} else {
 				err = -EINVAL;
 				goto err_ret;
 			}
 		}
 	}

 	return 0;
 err_ret:
 	return err;
 }

 static int proc_thermal_get_zone_temp(struct thermal_zone_device *zone,
 					 int *temp)
 {
 	int ret;

 	ret = read_temp_msr(temp);
 	if (!ret)
 		*temp = (stored_tjmax - *temp) * 1000;

 	return ret;
 }

 static struct thermal_zone_device_ops proc_thermal_local_ops = {
 	.get_temp       = proc_thermal_get_zone_temp,
 };

 static int proc_thermal_add(struct device *dev,
 			    struct proc_thermal_device **priv)
 {
 	struct proc_thermal_device *proc_priv;
 	struct acpi_device *adev;
 	acpi_status status;
 	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
 	union acpi_object *elements, *ppcc;
 	union acpi_object *p;
 	unsigned long long tmp;
 	struct thermal_zone_device_ops *ops = NULL;
 	int i;
 	int ret;

 	adev = ACPI_COMPANION(dev);
 	if (!adev)
 		return -ENODEV;

 	status = acpi_evaluate_object(adev->handle, "PPCC", NULL, &buf);
 	if (ACPI_FAILURE(status))
 		return -ENODEV;

 	p = buf.pointer;
 	if (!p || (p->type != ACPI_TYPE_PACKAGE)) {
 		dev_err(dev, "Invalid PPCC data\n");
 		ret = -EFAULT;
 		goto free_buffer;
 	}
 	if (!p->package.count) {
 		dev_err(dev, "Invalid PPCC package size\n");
 		ret = -EFAULT;
 		goto free_buffer;
 	}

 	proc_priv = devm_kzalloc(dev, sizeof(*proc_priv), GFP_KERNEL);
 	if (!proc_priv) {
 		ret = -ENOMEM;
 		goto free_buffer;
 	}

 	proc_priv->dev = dev;
 	proc_priv->adev = adev;

 	for (i = 0; i < min((int)p->package.count - 1, 2); ++i) {
 		elements = &(p->package.elements[i+1]);
 		if (elements->type != ACPI_TYPE_PACKAGE ||
 		    elements->package.count != 6) {
 			ret = -EFAULT;
 			goto free_buffer;
 		}
 		ppcc = elements->package.elements;
 		proc_priv->power_limits[i].index = ppcc[0].integer.value;
 		proc_priv->power_limits[i].min_uw = ppcc[1].integer.value;
 		proc_priv->power_limits[i].max_uw = ppcc[2].integer.value;
 		proc_priv->power_limits[i].tmin_us = ppcc[3].integer.value;
 		proc_priv->power_limits[i].tmax_us = ppcc[4].integer.value;
 		proc_priv->power_limits[i].step_uw = ppcc[5].integer.value;
 	}

 	*priv = proc_priv;

 	ret = sysfs_create_group(&dev->kobj,
 				 &power_limit_attribute_group);
 	if (ret)
 		goto free_buffer;

 	status = acpi_evaluate_integer(adev->handle, "_TMP", NULL, &tmp);
 	if (ACPI_FAILURE(status)) {
 		/* there is no _TMP method, add local method */
 		stored_tjmax = get_tjmax();
 		if (stored_tjmax > 0)
 			ops = &proc_thermal_local_ops;
 	}

 	proc_priv->int340x_zone = int340x_thermal_zone_add(adev, ops);
 	if (IS_ERR(proc_priv->int340x_zone)) {
 		sysfs_remove_group(&proc_priv->dev->kobj,
 			   &power_limit_attribute_group);
 		ret = PTR_ERR(proc_priv->int340x_zone);
 	} else
 		ret = 0;

 free_buffer:
 	kfree(buf.pointer);

 	return ret;
 }

 static void proc_thermal_remove(struct proc_thermal_device *proc_priv)
 {
 	int340x_thermal_zone_remove(proc_priv->int340x_zone);
 	sysfs_remove_group(&proc_priv->dev->kobj,
 			   &power_limit_attribute_group);
 }

 static int int3401_add(struct platform_device *pdev)
 {
 	struct proc_thermal_device *proc_priv;
 	int ret;

 	if (proc_thermal_emum_mode == PROC_THERMAL_PCI) {
 		dev_err(&pdev->dev, "error: enumerated as PCI dev\n");
 		return -ENODEV;
 	}

 	ret = proc_thermal_add(&pdev->dev, &proc_priv);
 	if (ret)
 		return ret;

 	platform_set_drvdata(pdev, proc_priv);
 	proc_thermal_emum_mode = PROC_THERMAL_PLATFORM_DEV;

 	return 0;
 }

 static int int3401_remove(struct platform_device *pdev)
 {
 	proc_thermal_remove(platform_get_drvdata(pdev));

 	return 0;
 }

 static irqreturn_t proc_thermal_pci_msi_irq(int irq, void *devid)
 {
 	struct proc_thermal_device *proc_priv;
 	struct pci_dev *pdev = devid;

 	proc_priv = pci_get_drvdata(pdev);

 	intel_soc_dts_iosf_interrupt_handler(proc_priv->soc_dts);

 	return IRQ_HANDLED;
 }

 static int  proc_thermal_pci_probe(struct pci_dev *pdev,
 				   const struct pci_device_id *unused)
 {
 	struct proc_thermal_device *proc_priv;
 	int ret;

 	if (proc_thermal_emum_mode == PROC_THERMAL_PLATFORM_DEV) {
 		dev_err(&pdev->dev, "error: enumerated as platform dev\n");
 		return -ENODEV;
 	}

 	ret = pci_enable_device(pdev);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "error: could not enable device\n");
 		return ret;
 	}

 	ret = proc_thermal_add(&pdev->dev, &proc_priv);
 	if (ret) {
 		pci_disable_device(pdev);
 		return ret;
 	}

 	pci_set_drvdata(pdev, proc_priv);
 	proc_thermal_emum_mode = PROC_THERMAL_PCI;

 	if (pdev->device == PCI_DEVICE_ID_PROC_BSW_THERMAL) {
 		/*
 		 * Enumerate additional DTS sensors available via IOSF.
 		 * But we are not treating as a failure condition, if
 		 * there are no aux DTSs enabled or fails. This driver
 		 * already exposes sensors, which can be accessed via
 		 * ACPI/MSR. So we don't want to fail for auxiliary DTSs.
 		 */
 		proc_priv->soc_dts = intel_soc_dts_iosf_init(
 					INTEL_SOC_DTS_INTERRUPT_MSI, 2, 0);

 		if (proc_priv->soc_dts && pdev->irq) {
 			ret = pci_enable_msi(pdev);
 			if (!ret) {
 				ret = request_threaded_irq(pdev->irq, NULL,
 						proc_thermal_pci_msi_irq,
 						IRQF_ONESHOT, "proc_thermal",
 						pdev);
 				if (ret) {
 					intel_soc_dts_iosf_exit(
 							proc_priv->soc_dts);
 					pci_disable_msi(pdev);
 					proc_priv->soc_dts = NULL;
 				}
 			}
 		} else
 			dev_err(&pdev->dev, "No auxiliary DTSs enabled\n");
 	}

 	return 0;
 }

 static void  proc_thermal_pci_remove(struct pci_dev *pdev)
 {
 	struct proc_thermal_device *proc_priv = pci_get_drvdata(pdev);

 	if (proc_priv->soc_dts) {
 		intel_soc_dts_iosf_exit(proc_priv->soc_dts);
 		if (pdev->irq) {
 			free_irq(pdev->irq, pdev);
 			pci_disable_msi(pdev);
 		}
 	}
 	proc_thermal_remove(proc_priv);
 	pci_disable_device(pdev);
 }

 static const struct pci_device_id proc_thermal_pci_ids[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BDW_THERMAL)},
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_HSB_THERMAL)},
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_SKL_THERMAL)},
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BSW_THERMAL)},
 	{ 0, },
 };

 MODULE_DEVICE_TABLE(pci, proc_thermal_pci_ids);

 static struct pci_driver proc_thermal_pci_driver = {
 	.name		= "proc_thermal",
 	.probe		= proc_thermal_pci_probe,
 	.remove		= proc_thermal_pci_remove,
 	.id_table	= proc_thermal_pci_ids,
 };

 static const struct acpi_device_id int3401_device_ids[] = {
 	{"INT3401", 0},
 	{"", 0},
 };
 MODULE_DEVICE_TABLE(acpi, int3401_device_ids);

 static struct platform_driver int3401_driver = {
 	.probe = int3401_add,
 	.remove = int3401_remove,
 	.driver = {
 		.name = "int3401 thermal",
 		.acpi_match_table = int3401_device_ids,
 	},
 };

 static int __init proc_thermal_init(void)
 {
 	int ret;

 	ret = platform_driver_register(&int3401_driver);
 	if (ret)
 		return ret;

 	ret = pci_register_driver(&proc_thermal_pci_driver);

 	return ret;
 }

 static void __exit proc_thermal_exit(void)
 {
 	platform_driver_unregister(&int3401_driver);
 	pci_unregister_driver(&proc_thermal_pci_driver);
 }

 module_init(proc_thermal_init);
 module_exit(proc_thermal_exit);

 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
 MODULE_DESCRIPTION("Processor Thermal Reporting Device Driver");
 MODULE_LICENSE("GPL v2");
	/*
	* processor_thermal_device.c
	* Copyright (c) 2014, 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/pci.h>
	#include <linux/interrupt.h>
	#include <linux/platform_device.h>
	#include <linux/acpi.h>
	#include <linux/thermal.h>
	#include "int340x_thermal_zone.h"
	#include "../intel_soc_dts_iosf.h"

	/* Broadwell-U/HSB thermal reporting device */
	#define PCI_DEVICE_ID_PROC_BDW_THERMAL 0x1603
	#define PCI_DEVICE_ID_PROC_HSB_THERMAL 0x0A03

	/* Skylake thermal reporting device */
	#define PCI_DEVICE_ID_PROC_SKL_THERMAL 0x1903

	/* Braswell thermal reporting device */
	#define PCI_DEVICE_ID_PROC_BSW_THERMAL 0x22DC

	struct power_config {
	u32 index;
	u32 min_uw;
	u32 max_uw;
	u32 tmin_us;
	u32 tmax_us;
	u32 step_uw;
	};

	struct proc_thermal_device {
	struct device *dev;
	struct acpi_device *adev;
	struct power_config power_limits[2];
	struct int34x_thermal_zone *int340x_zone;
	struct intel_soc_dts_sensors *soc_dts;
	};

	enum proc_thermal_emum_mode_type {
	PROC_THERMAL_NONE,
	PROC_THERMAL_PCI,
	PROC_THERMAL_PLATFORM_DEV
	};

	/*
	* We can have only one type of enumeration, PCI or Platform,
	* not both. So we don't need instance specific data.
	*/
	static enum proc_thermal_emum_mode_type proc_thermal_emum_mode =
	PROC_THERMAL_NONE;

	#define POWER_LIMIT_SHOW(index, suffix) \
	static ssize_t power_limit_##index##_##suffix##_show(struct device *dev, \
	struct device_attribute *attr, \
	char *buf) \
	{ \
	struct pci_dev *pci_dev; \
	struct platform_device *pdev; \
	struct proc_thermal_device *proc_dev; \
	\
	if (proc_thermal_emum_mode == PROC_THERMAL_PLATFORM_DEV) { \
	pdev = to_platform_device(dev); \
	proc_dev = platform_get_drvdata(pdev); \
	} else { \
	pci_dev = to_pci_dev(dev); \
	proc_dev = pci_get_drvdata(pci_dev); \
	} \
	return sprintf(buf, "%lu\n",\
	(unsigned long)proc_dev->power_limits[index].suffix * 1000); \
	}

	POWER_LIMIT_SHOW(0, min_uw)
	POWER_LIMIT_SHOW(0, max_uw)
	POWER_LIMIT_SHOW(0, step_uw)
	POWER_LIMIT_SHOW(0, tmin_us)
	POWER_LIMIT_SHOW(0, tmax_us)

	POWER_LIMIT_SHOW(1, min_uw)
	POWER_LIMIT_SHOW(1, max_uw)
	POWER_LIMIT_SHOW(1, step_uw)
	POWER_LIMIT_SHOW(1, tmin_us)
	POWER_LIMIT_SHOW(1, tmax_us)

	static DEVICE_ATTR_RO(power_limit_0_min_uw);
	static DEVICE_ATTR_RO(power_limit_0_max_uw);
	static DEVICE_ATTR_RO(power_limit_0_step_uw);
	static DEVICE_ATTR_RO(power_limit_0_tmin_us);
	static DEVICE_ATTR_RO(power_limit_0_tmax_us);

	static DEVICE_ATTR_RO(power_limit_1_min_uw);
	static DEVICE_ATTR_RO(power_limit_1_max_uw);
	static DEVICE_ATTR_RO(power_limit_1_step_uw);
	static DEVICE_ATTR_RO(power_limit_1_tmin_us);
	static DEVICE_ATTR_RO(power_limit_1_tmax_us);

	static struct attribute *power_limit_attrs[] = {
	&dev_attr_power_limit_0_min_uw.attr,
	&dev_attr_power_limit_1_min_uw.attr,
	&dev_attr_power_limit_0_max_uw.attr,
	&dev_attr_power_limit_1_max_uw.attr,
	&dev_attr_power_limit_0_step_uw.attr,
	&dev_attr_power_limit_1_step_uw.attr,
	&dev_attr_power_limit_0_tmin_us.attr,
	&dev_attr_power_limit_1_tmin_us.attr,
	&dev_attr_power_limit_0_tmax_us.attr,
	&dev_attr_power_limit_1_tmax_us.attr,
	NULL
	};

	static struct attribute_group power_limit_attribute_group = {
	.attrs = power_limit_attrs,
	.name = "power_limits"
	};

	static int stored_tjmax; /* since it is fixed, we can have local storage */

	static int get_tjmax(void)
	{
	u32 eax, edx;
	u32 val;
	int err;

	err = rdmsr_safe(MSR_IA32_TEMPERATURE_TARGET, &eax, &edx);
	if (err)
	return err;

	val = (eax >> 16) & 0xff;
	if (val)
	return val;

	return -EINVAL;
	}

	static int read_temp_msr(int *temp)
	{
	int cpu;
	u32 eax, edx;
	int err;
	unsigned long curr_temp_off = 0;

	*temp = 0;

	for_each_online_cpu(cpu) {
	err = rdmsr_safe_on_cpu(cpu, MSR_IA32_THERM_STATUS, &eax,
	&edx);
	if (err)
	goto err_ret;
	else {
	if (eax & 0x80000000) {
	curr_temp_off = (eax >> 16) & 0x7f;
	if (!temp \|\| curr_temp_off < temp)
	*temp = curr_temp_off;
	} else {
	err = -EINVAL;
	goto err_ret;
	}
	}
	}

	return 0;
	err_ret:
	return err;
	}

	static int proc_thermal_get_zone_temp(struct thermal_zone_device *zone,
	int *temp)
	{
	int ret;

	ret = read_temp_msr(temp);
	if (!ret)
	temp = (stored_tjmax - temp) * 1000;

	return ret;
	}

	static struct thermal_zone_device_ops proc_thermal_local_ops = {
	.get_temp = proc_thermal_get_zone_temp,
	};

	static int proc_thermal_add(struct device *dev,
	struct proc_thermal_device **priv)
	{
	struct proc_thermal_device *proc_priv;
	struct acpi_device *adev;
	acpi_status status;
	struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object elements, ppcc;
	union acpi_object *p;
	unsigned long long tmp;
	struct thermal_zone_device_ops *ops = NULL;
	int i;
	int ret;

	adev = ACPI_COMPANION(dev);
	if (!adev)
	return -ENODEV;

	status = acpi_evaluate_object(adev->handle, "PPCC", NULL, &buf);
	if (ACPI_FAILURE(status))
	return -ENODEV;

	p = buf.pointer;
	if (!p \|\| (p->type != ACPI_TYPE_PACKAGE)) {
	dev_err(dev, "Invalid PPCC data\n");
	ret = -EFAULT;
	goto free_buffer;
	}
	if (!p->package.count) {
	dev_err(dev, "Invalid PPCC package size\n");
	ret = -EFAULT;
	goto free_buffer;
	}

	proc_priv = devm_kzalloc(dev, sizeof(*proc_priv), GFP_KERNEL);
	if (!proc_priv) {
	ret = -ENOMEM;
	goto free_buffer;
	}

	proc_priv->dev = dev;
	proc_priv->adev = adev;

	for (i = 0; i < min((int)p->package.count - 1, 2); ++i) {
	elements = &(p->package.elements[i+1]);
	if (elements->type != ACPI_TYPE_PACKAGE \|\|
	elements->package.count != 6) {
	ret = -EFAULT;
	goto free_buffer;
	}
	ppcc = elements->package.elements;
	proc_priv->power_limits[i].index = ppcc[0].integer.value;
	proc_priv->power_limits[i].min_uw = ppcc[1].integer.value;
	proc_priv->power_limits[i].max_uw = ppcc[2].integer.value;
	proc_priv->power_limits[i].tmin_us = ppcc[3].integer.value;
	proc_priv->power_limits[i].tmax_us = ppcc[4].integer.value;
	proc_priv->power_limits[i].step_uw = ppcc[5].integer.value;
	}

	*priv = proc_priv;

	ret = sysfs_create_group(&dev->kobj,
	&power_limit_attribute_group);
	if (ret)
	goto free_buffer;

	status = acpi_evaluate_integer(adev->handle, "_TMP", NULL, &tmp);
	if (ACPI_FAILURE(status)) {
	/* there is no _TMP method, add local method */
	stored_tjmax = get_tjmax();
	if (stored_tjmax > 0)
	ops = &proc_thermal_local_ops;
	}

	proc_priv->int340x_zone = int340x_thermal_zone_add(adev, ops);
	if (IS_ERR(proc_priv->int340x_zone)) {
	sysfs_remove_group(&proc_priv->dev->kobj,
	&power_limit_attribute_group);
	ret = PTR_ERR(proc_priv->int340x_zone);
	} else
	ret = 0;

	free_buffer:
	kfree(buf.pointer);

	return ret;
	}

	static void proc_thermal_remove(struct proc_thermal_device *proc_priv)
	{
	int340x_thermal_zone_remove(proc_priv->int340x_zone);
	sysfs_remove_group(&proc_priv->dev->kobj,
	&power_limit_attribute_group);
	}

	static int int3401_add(struct platform_device *pdev)
	{
	struct proc_thermal_device *proc_priv;
	int ret;

	if (proc_thermal_emum_mode == PROC_THERMAL_PCI) {
	dev_err(&pdev->dev, "error: enumerated as PCI dev\n");
	return -ENODEV;
	}

	ret = proc_thermal_add(&pdev->dev, &proc_priv);
	if (ret)
	return ret;

	platform_set_drvdata(pdev, proc_priv);
	proc_thermal_emum_mode = PROC_THERMAL_PLATFORM_DEV;

	return 0;
	}

	static int int3401_remove(struct platform_device *pdev)
	{
	proc_thermal_remove(platform_get_drvdata(pdev));

	return 0;
	}

	static irqreturn_t proc_thermal_pci_msi_irq(int irq, void *devid)
	{
	struct proc_thermal_device *proc_priv;
	struct pci_dev *pdev = devid;

	proc_priv = pci_get_drvdata(pdev);

	intel_soc_dts_iosf_interrupt_handler(proc_priv->soc_dts);

	return IRQ_HANDLED;
	}

	static int proc_thermal_pci_probe(struct pci_dev *pdev,
	const struct pci_device_id *unused)
	{
	struct proc_thermal_device *proc_priv;
	int ret;

	if (proc_thermal_emum_mode == PROC_THERMAL_PLATFORM_DEV) {
	dev_err(&pdev->dev, "error: enumerated as platform dev\n");
	return -ENODEV;
	}

	ret = pci_enable_device(pdev);
	if (ret < 0) {
	dev_err(&pdev->dev, "error: could not enable device\n");
	return ret;
	}

	ret = proc_thermal_add(&pdev->dev, &proc_priv);
	if (ret) {
	pci_disable_device(pdev);
	return ret;
	}

	pci_set_drvdata(pdev, proc_priv);
	proc_thermal_emum_mode = PROC_THERMAL_PCI;

	if (pdev->device == PCI_DEVICE_ID_PROC_BSW_THERMAL) {
	/*
	* Enumerate additional DTS sensors available via IOSF.
	* But we are not treating as a failure condition, if
	* there are no aux DTSs enabled or fails. This driver
	* already exposes sensors, which can be accessed via
	* ACPI/MSR. So we don't want to fail for auxiliary DTSs.
	*/
	proc_priv->soc_dts = intel_soc_dts_iosf_init(
	INTEL_SOC_DTS_INTERRUPT_MSI, 2, 0);

	if (proc_priv->soc_dts && pdev->irq) {
	ret = pci_enable_msi(pdev);
	if (!ret) {
	ret = request_threaded_irq(pdev->irq, NULL,
	proc_thermal_pci_msi_irq,
	IRQF_ONESHOT, "proc_thermal",
	pdev);
	if (ret) {
	intel_soc_dts_iosf_exit(
	proc_priv->soc_dts);
	pci_disable_msi(pdev);
	proc_priv->soc_dts = NULL;
	}
	}
	} else
	dev_err(&pdev->dev, "No auxiliary DTSs enabled\n");
	}

	return 0;
	}

	static void proc_thermal_pci_remove(struct pci_dev *pdev)
	{
	struct proc_thermal_device *proc_priv = pci_get_drvdata(pdev);

	if (proc_priv->soc_dts) {
	intel_soc_dts_iosf_exit(proc_priv->soc_dts);
	if (pdev->irq) {
	free_irq(pdev->irq, pdev);
	pci_disable_msi(pdev);
	}
	}
	proc_thermal_remove(proc_priv);
	pci_disable_device(pdev);
	}

	static const struct pci_device_id proc_thermal_pci_ids[] = {
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BDW_THERMAL)},
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_HSB_THERMAL)},
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_SKL_THERMAL)},
	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_PROC_BSW_THERMAL)},
	{ 0, },
	};

	MODULE_DEVICE_TABLE(pci, proc_thermal_pci_ids);

	static struct pci_driver proc_thermal_pci_driver = {
	.name = "proc_thermal",
	.probe = proc_thermal_pci_probe,
	.remove = proc_thermal_pci_remove,
	.id_table = proc_thermal_pci_ids,
	};

	static const struct acpi_device_id int3401_device_ids[] = {
	{"INT3401", 0},
	{"", 0},
	};
	MODULE_DEVICE_TABLE(acpi, int3401_device_ids);

	static struct platform_driver int3401_driver = {
	.probe = int3401_add,
	.remove = int3401_remove,
	.driver = {
	.name = "int3401 thermal",
	.acpi_match_table = int3401_device_ids,
	},
	};

	static int __init proc_thermal_init(void)
	{
	int ret;

	ret = platform_driver_register(&int3401_driver);
	if (ret)
	return ret;

	ret = pci_register_driver(&proc_thermal_pci_driver);

	return ret;
	}

	static void __exit proc_thermal_exit(void)
	{
	platform_driver_unregister(&int3401_driver);
	pci_unregister_driver(&proc_thermal_pci_driver);
	}

	module_init(proc_thermal_init);
	module_exit(proc_thermal_exit);

	MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
	MODULE_DESCRIPTION("Processor Thermal Reporting Device Driver");
	MODULE_LICENSE("GPL v2");