drivers/thermal/msm-tsens.c - kernel/msm-4.9 - Gitiles

 /* Copyright (c) 2017, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
  * only version 2 as published by the Free Software Foundation.
  *
  * This program is distributed in the hope that 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/err.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm.h>
 #include <linux/kernel.h>
 #include <linux/io.h>
 #include <linux/slab.h>
 #include <linux/thermal.h>
 #include "tsens.h"

 LIST_HEAD(tsens_device_list);

 static int tsens_get_temp(struct tsens_sensor *s, int *temp)
 {
 	struct tsens_device *tmdev = s->tmdev;

 	return tmdev->ops->get_temp(s, temp);
 }

 static int tsens_set_trip_temp(struct tsens_sensor *s, int trip, int temp)
 {
 	struct tsens_device *tmdev = s->tmdev;

 	if (tmdev->ops->set_trip_temp)
 		return tmdev->ops->set_trip_temp(s, trip, temp);

 	return 0;
 }

 static int tsens_init(struct tsens_device *tmdev)
 {
 	if (tmdev->ops->hw_init)
 		return tmdev->ops->hw_init(tmdev);

 	return 0;
 }

 static int tsens_register_interrupts(struct tsens_device *tmdev)
 {
 	if (tmdev->ops->interrupts_reg)
 		return tmdev->ops->interrupts_reg(tmdev);

 	return 0;
 }

 static const struct of_device_id tsens_table[] = {
 	{	.compatible = "qcom,msm8996-tsens",
 		.data = &data_tsens2xxx,
 	},
 	{	.compatible = "qcom,msm8953-tsens",
 		.data = &data_tsens2xxx,
 	},
 	{	.compatible = "qcom,msm8998-tsens",
 		.data = &data_tsens2xxx,
 	},
 	{	.compatible = "qcom,msmhamster-tsens",
 		.data = &data_tsens2xxx,
 	},
 	{	.compatible = "qcom,sdm660-tsens",
 		.data = &data_tsens23xx,
 	},
 	{	.compatible = "qcom,sdm630-tsens",
 		.data = &data_tsens23xx,
 	},
 	{	.compatible = "qcom,sdm845-tsens",
 		.data = &data_tsens24xx,
 	},
 	{}
 };
 MODULE_DEVICE_TABLE(of, tsens_table);

 static struct thermal_zone_of_device_ops tsens_tm_thermal_zone_ops = {
 	.get_temp = tsens_get_temp,
 	.set_trip_temp = tsens_set_trip_temp,
 };

 static int get_device_tree_data(struct platform_device *pdev,
 				struct tsens_device *tmdev)
 {
 	struct device_node *of_node = pdev->dev.of_node;
 	u32 *hw_id, *client_id;
 	u32 rc = 0, i, tsens_num_sensors = 0;
 	int tsens_len;
 	const struct of_device_id *id;
 	const struct tsens_data *data;
 	struct resource *res_tsens_mem, *res_mem = NULL;

 	if (!of_match_node(tsens_table, of_node)) {
 		pr_err("Need to read SoC specific fuse map\n");
 		return -ENODEV;
 	}

 	id = of_match_node(tsens_table, of_node);
 	if (id == NULL) {
 		pr_err("can not find tsens_table of_node\n");
 		return -ENODEV;
 	}

 	data = id->data;
 	hw_id = devm_kzalloc(&pdev->dev,
 		tsens_num_sensors * sizeof(u32), GFP_KERNEL);
 	if (!hw_id)
 		return -ENOMEM;

 	client_id = devm_kzalloc(&pdev->dev,
 		tsens_num_sensors * sizeof(u32), GFP_KERNEL);
 	if (!client_id)
 		return -ENOMEM;

 	tmdev->ops = data->ops;
 	tmdev->ctrl_data = data;
 	tmdev->pdev = pdev;

 	if (!tmdev->ops || !tmdev->ops->hw_init || !tmdev->ops->get_temp) {
 		pr_err("Invalid ops\n");
 		return -EINVAL;
 	}

 	/* TSENS register region */
 	res_tsens_mem = platform_get_resource_byname(pdev,
 					IORESOURCE_MEM, "tsens_physical");
 	if (!res_tsens_mem) {
 		pr_err("Could not get tsens physical address resource\n");
 		return -EINVAL;
 	}

 	tsens_len = res_tsens_mem->end - res_tsens_mem->start + 1;

 	res_mem = request_mem_region(res_tsens_mem->start,
 				tsens_len, res_tsens_mem->name);
 	if (!res_mem) {
 		pr_err("Request tsens physical memory region failed\n");
 		return -EINVAL;
 	}

 	tmdev->tsens_addr = ioremap(res_mem->start, tsens_len);
 	if (!tmdev->tsens_addr) {
 		pr_err("Failed to IO map TSENS registers.\n");
 		return -EINVAL;
 	}

 	rc = of_property_read_u32_array(of_node,
 		"qcom,sensor-id", hw_id, tsens_num_sensors);
 	if (rc) {
 		pr_err("Default sensor id mapping\n");
 		for (i = 0; i < tsens_num_sensors; i++)
 			tmdev->sensor[i].hw_id = i;
 	} else {
 		pr_err("Use specified sensor id mapping\n");
 		for (i = 0; i < tsens_num_sensors; i++)
 			tmdev->sensor[i].hw_id = hw_id[i];
 	}

 	rc = of_property_read_u32_array(of_node,
 		"qcom,client-id", client_id, tsens_num_sensors);
 	if (rc) {
 		for (i = 0; i < tsens_num_sensors; i++)
 			tmdev->sensor[i].id = i;
 		pr_debug("Default client id mapping\n");
 	} else {
 		for (i = 0; i < tsens_num_sensors; i++)
 			tmdev->sensor[i].id = client_id[i];
 		pr_debug("Use specified client id mapping\n");
 	}

 	return 0;
 }

 static int tsens_thermal_zone_register(struct tsens_device *tmdev)
 {
 	int rc = 0, i = 0;

 	for (i = 0; i < tmdev->num_sensors; i++) {
 		tmdev->sensor[i].tmdev = tmdev;
 		tmdev->sensor[i].tzd = devm_thermal_zone_of_sensor_register(
 					&tmdev->pdev->dev, i, &tmdev->sensor[i],
 					&tsens_tm_thermal_zone_ops);
 		if (IS_ERR(tmdev->sensor[i].tzd)) {
 			pr_err("Error registering sensor:%d\n", i);
 			continue;
 		}
 	}

 	return rc;
 }

 static int tsens_tm_remove(struct platform_device *pdev)
 {
 	platform_set_drvdata(pdev, NULL);

 	return 0;
 }

 int tsens_tm_probe(struct platform_device *pdev)
 {
 	struct device_node *of_node = pdev->dev.of_node;
 	struct tsens_device *tmdev = NULL;
 	u32 tsens_num_sensors = 0;
 	int rc;

 	if (!(pdev->dev.of_node))
 		return -ENODEV;

 	rc = of_property_read_u32(of_node,
 			"qcom,sensors", &tsens_num_sensors);
 	if (rc || (!tsens_num_sensors)) {
 		dev_err(&pdev->dev, "missing sensors\n");
 		return -ENODEV;
 	}

 	tmdev = devm_kzalloc(&pdev->dev,
 			sizeof(struct tsens_device) +
 			tsens_num_sensors *
 			sizeof(struct tsens_sensor),
 			GFP_KERNEL);
 	if (tmdev == NULL) {
 		pr_err("%s: kzalloc() failed.\n", __func__);
 		return -ENOMEM;
 	}

 	tmdev->num_sensors = tsens_num_sensors;

 	rc = get_device_tree_data(pdev, tmdev);
 	if (rc) {
 		pr_err("Error reading TSENS DT\n");
 		return rc;
 	}

 	rc = tsens_init(tmdev);
 	if (rc)
 		return rc;

 	rc = tsens_thermal_zone_register(tmdev);
 	if (rc) {
 		pr_err("Error registering the thermal zone\n");
 		return rc;
 	}

 	rc = tsens_register_interrupts(tmdev);
 	if (rc < 0) {
 		pr_err("TSENS interrupt register failed:%d\n", rc);
 		return rc;
 	}

 	list_add_tail(&tmdev->list, &tsens_device_list);
 	platform_set_drvdata(pdev, tmdev);

 	return rc;
 }

 static struct platform_driver tsens_tm_driver = {
 	.probe = tsens_tm_probe,
 	.remove = tsens_tm_remove,
 	.driver = {
 		.name = "msm-tsens",
 		.owner = THIS_MODULE,
 		.of_match_table = tsens_table,
 	},
 };

 int __init tsens_tm_init_driver(void)
 {
 	return platform_driver_register(&tsens_tm_driver);
 }
 subsys_initcall(tsens_tm_init_driver);

 static void __exit tsens_tm_deinit(void)
 {
 	platform_driver_unregister(&tsens_tm_driver);
 }
 module_exit(tsens_tm_deinit);

 MODULE_ALIAS("platform:" TSENS_DRIVER_NAME);
 MODULE_LICENSE("GPL v2");
	/* Copyright (c) 2017, The Linux Foundation. All rights reserved.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 and
	* only version 2 as published by the Free Software Foundation.
	*
	* This program is distributed in the hope that 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/err.h>
	#include <linux/module.h>
	#include <linux/of.h>
	#include <linux/platform_device.h>
	#include <linux/pm.h>
	#include <linux/kernel.h>
	#include <linux/io.h>
	#include <linux/slab.h>
	#include <linux/thermal.h>
	#include "tsens.h"

	LIST_HEAD(tsens_device_list);

	static int tsens_get_temp(struct tsens_sensor s, int temp)
	{
	struct tsens_device *tmdev = s->tmdev;

	return tmdev->ops->get_temp(s, temp);
	}

	static int tsens_set_trip_temp(struct tsens_sensor *s, int trip, int temp)
	{
	struct tsens_device *tmdev = s->tmdev;

	if (tmdev->ops->set_trip_temp)
	return tmdev->ops->set_trip_temp(s, trip, temp);

	return 0;
	}

	static int tsens_init(struct tsens_device *tmdev)
	{
	if (tmdev->ops->hw_init)
	return tmdev->ops->hw_init(tmdev);

	return 0;
	}

	static int tsens_register_interrupts(struct tsens_device *tmdev)
	{
	if (tmdev->ops->interrupts_reg)
	return tmdev->ops->interrupts_reg(tmdev);

	return 0;
	}

	static const struct of_device_id tsens_table[] = {
	{ .compatible = "qcom,msm8996-tsens",
	.data = &data_tsens2xxx,
	},
	{ .compatible = "qcom,msm8953-tsens",
	.data = &data_tsens2xxx,
	},
	{ .compatible = "qcom,msm8998-tsens",
	.data = &data_tsens2xxx,
	},
	{ .compatible = "qcom,msmhamster-tsens",
	.data = &data_tsens2xxx,
	},
	{ .compatible = "qcom,sdm660-tsens",
	.data = &data_tsens23xx,
	},
	{ .compatible = "qcom,sdm630-tsens",
	.data = &data_tsens23xx,
	},
	{ .compatible = "qcom,sdm845-tsens",
	.data = &data_tsens24xx,
	},
	{}
	};
	MODULE_DEVICE_TABLE(of, tsens_table);

	static struct thermal_zone_of_device_ops tsens_tm_thermal_zone_ops = {
	.get_temp = tsens_get_temp,
	.set_trip_temp = tsens_set_trip_temp,
	};

	static int get_device_tree_data(struct platform_device *pdev,
	struct tsens_device *tmdev)
	{
	struct device_node *of_node = pdev->dev.of_node;
	u32 hw_id, client_id;
	u32 rc = 0, i, tsens_num_sensors = 0;
	int tsens_len;
	const struct of_device_id *id;
	const struct tsens_data *data;
	struct resource res_tsens_mem, res_mem = NULL;

	if (!of_match_node(tsens_table, of_node)) {
	pr_err("Need to read SoC specific fuse map\n");
	return -ENODEV;
	}

	id = of_match_node(tsens_table, of_node);
	if (id == NULL) {
	pr_err("can not find tsens_table of_node\n");
	return -ENODEV;
	}

	data = id->data;
	hw_id = devm_kzalloc(&pdev->dev,
	tsens_num_sensors * sizeof(u32), GFP_KERNEL);
	if (!hw_id)
	return -ENOMEM;

	client_id = devm_kzalloc(&pdev->dev,
	tsens_num_sensors * sizeof(u32), GFP_KERNEL);
	if (!client_id)
	return -ENOMEM;

	tmdev->ops = data->ops;
	tmdev->ctrl_data = data;
	tmdev->pdev = pdev;

	if (!tmdev->ops \|\| !tmdev->ops->hw_init \|\| !tmdev->ops->get_temp) {
	pr_err("Invalid ops\n");
	return -EINVAL;
	}

	/* TSENS register region */
	res_tsens_mem = platform_get_resource_byname(pdev,
	IORESOURCE_MEM, "tsens_physical");
	if (!res_tsens_mem) {
	pr_err("Could not get tsens physical address resource\n");
	return -EINVAL;
	}

	tsens_len = res_tsens_mem->end - res_tsens_mem->start + 1;

	res_mem = request_mem_region(res_tsens_mem->start,
	tsens_len, res_tsens_mem->name);
	if (!res_mem) {
	pr_err("Request tsens physical memory region failed\n");
	return -EINVAL;
	}

	tmdev->tsens_addr = ioremap(res_mem->start, tsens_len);
	if (!tmdev->tsens_addr) {
	pr_err("Failed to IO map TSENS registers.\n");
	return -EINVAL;
	}

	rc = of_property_read_u32_array(of_node,
	"qcom,sensor-id", hw_id, tsens_num_sensors);
	if (rc) {
	pr_err("Default sensor id mapping\n");
	for (i = 0; i < tsens_num_sensors; i++)
	tmdev->sensor[i].hw_id = i;
	} else {
	pr_err("Use specified sensor id mapping\n");
	for (i = 0; i < tsens_num_sensors; i++)
	tmdev->sensor[i].hw_id = hw_id[i];
	}

	rc = of_property_read_u32_array(of_node,
	"qcom,client-id", client_id, tsens_num_sensors);
	if (rc) {
	for (i = 0; i < tsens_num_sensors; i++)
	tmdev->sensor[i].id = i;
	pr_debug("Default client id mapping\n");
	} else {
	for (i = 0; i < tsens_num_sensors; i++)
	tmdev->sensor[i].id = client_id[i];
	pr_debug("Use specified client id mapping\n");
	}

	return 0;
	}

	static int tsens_thermal_zone_register(struct tsens_device *tmdev)
	{
	int rc = 0, i = 0;

	for (i = 0; i < tmdev->num_sensors; i++) {
	tmdev->sensor[i].tmdev = tmdev;
	tmdev->sensor[i].tzd = devm_thermal_zone_of_sensor_register(
	&tmdev->pdev->dev, i, &tmdev->sensor[i],
	&tsens_tm_thermal_zone_ops);
	if (IS_ERR(tmdev->sensor[i].tzd)) {
	pr_err("Error registering sensor:%d\n", i);
	continue;
	}
	}

	return rc;
	}

	static int tsens_tm_remove(struct platform_device *pdev)
	{
	platform_set_drvdata(pdev, NULL);

	return 0;
	}

	int tsens_tm_probe(struct platform_device *pdev)
	{
	struct device_node *of_node = pdev->dev.of_node;
	struct tsens_device *tmdev = NULL;
	u32 tsens_num_sensors = 0;
	int rc;

	if (!(pdev->dev.of_node))
	return -ENODEV;

	rc = of_property_read_u32(of_node,
	"qcom,sensors", &tsens_num_sensors);
	if (rc \|\| (!tsens_num_sensors)) {
	dev_err(&pdev->dev, "missing sensors\n");
	return -ENODEV;
	}

	tmdev = devm_kzalloc(&pdev->dev,
	sizeof(struct tsens_device) +
	tsens_num_sensors *
	sizeof(struct tsens_sensor),
	GFP_KERNEL);
	if (tmdev == NULL) {
	pr_err("%s: kzalloc() failed.\n", __func__);
	return -ENOMEM;
	}

	tmdev->num_sensors = tsens_num_sensors;

	rc = get_device_tree_data(pdev, tmdev);
	if (rc) {
	pr_err("Error reading TSENS DT\n");
	return rc;
	}

	rc = tsens_init(tmdev);
	if (rc)
	return rc;

	rc = tsens_thermal_zone_register(tmdev);
	if (rc) {
	pr_err("Error registering the thermal zone\n");
	return rc;
	}

	rc = tsens_register_interrupts(tmdev);
	if (rc < 0) {
	pr_err("TSENS interrupt register failed:%d\n", rc);
	return rc;
	}

	list_add_tail(&tmdev->list, &tsens_device_list);
	platform_set_drvdata(pdev, tmdev);

	return rc;
	}

	static struct platform_driver tsens_tm_driver = {
	.probe = tsens_tm_probe,
	.remove = tsens_tm_remove,
	.driver = {
	.name = "msm-tsens",
	.owner = THIS_MODULE,
	.of_match_table = tsens_table,
	},
	};

	int __init tsens_tm_init_driver(void)
	{
	return platform_driver_register(&tsens_tm_driver);
	}
	subsys_initcall(tsens_tm_init_driver);

	static void __exit tsens_tm_deinit(void)
	{
	platform_driver_unregister(&tsens_tm_driver);
	}
	module_exit(tsens_tm_deinit);

	MODULE_ALIAS("platform:" TSENS_DRIVER_NAME);
	MODULE_LICENSE("GPL v2");