[linux-block.git] / drivers / thermal / imx_sc_thermal.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2018-2020 NXP.
 */

#include <dt-bindings/firmware/imx/rsrc.h>
#include <linux/err.h>
#include <linux/firmware/imx/sci.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/thermal.h>

#include "thermal_hwmon.h"

#define IMX_SC_MISC_FUNC_GET_TEMP	13

static struct imx_sc_ipc *thermal_ipc_handle;

struct imx_sc_sensor {
	struct thermal_zone_device *tzd;
	u32 resource_id;
};

struct req_get_temp {
	u16 resource_id;
	u8 type;
} __packed __aligned(4);

struct resp_get_temp {
	s16 celsius;
	s8 tenths;
} __packed __aligned(4);

struct imx_sc_msg_misc_get_temp {
	struct imx_sc_rpc_msg hdr;
	union {
		struct req_get_temp req;
		struct resp_get_temp resp;
	} data;
} __packed __aligned(4);

static int imx_sc_thermal_get_temp(struct thermal_zone_device *tz, int *temp)
{
	struct imx_sc_msg_misc_get_temp msg;
	struct imx_sc_rpc_msg *hdr = &msg.hdr;
	struct imx_sc_sensor *sensor = thermal_zone_device_priv(tz);
	int ret;

	msg.data.req.resource_id = sensor->resource_id;
	msg.data.req.type = IMX_SC_C_TEMP;

	hdr->ver = IMX_SC_RPC_VERSION;
	hdr->svc = IMX_SC_RPC_SVC_MISC;
	hdr->func = IMX_SC_MISC_FUNC_GET_TEMP;
	hdr->size = 2;

	ret = imx_scu_call_rpc(thermal_ipc_handle, &msg, true);
	if (ret)
		return ret;

	*temp = msg.data.resp.celsius * 1000 + msg.data.resp.tenths * 100;

	return 0;
}

static const struct thermal_zone_device_ops imx_sc_thermal_ops = {
	.get_temp = imx_sc_thermal_get_temp,
};

static int imx_sc_thermal_probe(struct platform_device *pdev)
{
	struct imx_sc_sensor *sensor;
	const int *resource_id;
	int i, ret;

	ret = imx_scu_get_handle(&thermal_ipc_handle);
	if (ret)
		return ret;

	resource_id = of_device_get_match_data(&pdev->dev);
	if (!resource_id)
		return -EINVAL;

	for (i = 0; resource_id[i] >= 0; i++) {

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

		sensor->resource_id = resource_id[i];

		sensor->tzd = devm_thermal_of_zone_register(&pdev->dev, sensor->resource_id,
							    sensor, &imx_sc_thermal_ops);
		if (IS_ERR(sensor->tzd)) {
			/*
			 * Save the error value before freeing the
			 * sensor pointer, otherwise we endup with a
			 * use-after-free error
			 */
			ret = PTR_ERR(sensor->tzd);

			devm_kfree(&pdev->dev, sensor);

			/*
			 * The thermal framework notifies us there is
			 * no thermal zone description for such a
			 * sensor id
			 */
			if (ret == -ENODEV)
				continue;

			return dev_err_probe(&pdev->dev, ret, "failed to register thermal zone\n");
		}

		devm_thermal_add_hwmon_sysfs(&pdev->dev, sensor->tzd);
	}

	return 0;
}

static const int imx_sc_sensors[] = {
	IMX_SC_R_SYSTEM, IMX_SC_R_PMIC_0,
	IMX_SC_R_AP_0, IMX_SC_R_AP_1,
	IMX_SC_R_GPU_0_PID0, IMX_SC_R_GPU_1_PID0,
	IMX_SC_R_DRC_0, -1 };

static const struct of_device_id imx_sc_thermal_table[] = {
	{ .compatible = "fsl,imx-sc-thermal", .data =  imx_sc_sensors },
	{}
};
MODULE_DEVICE_TABLE(of, imx_sc_thermal_table);

static struct platform_driver imx_sc_thermal_driver = {
		.probe = imx_sc_thermal_probe,
		.driver = {
			.name = "imx-sc-thermal",
			.of_match_table = imx_sc_thermal_table,
		},
};
module_platform_driver(imx_sc_thermal_driver);

MODULE_AUTHOR("Anson Huang <Anson.Huang@nxp.com>");
MODULE_DESCRIPTION("Thermal driver for NXP i.MX SoCs with system controller");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
e20db70d AH	1	// SPDX-License-Identifier: GPL-2.0+
	2	/*
	3	* Copyright 2018-2020 NXP.
	4	*/
	5
755a7397	6	#include <dt-bindings/firmware/imx/rsrc.h>
e20db70d AH	7	#include <linux/err.h>
e20db70d AH	8	#include <linux/firmware/imx/sci.h>
e20db70d AH	9	#include <linux/module.h>
e20db70d AH	10	#include <linux/of.h>
e20db70d AH	11	#include <linux/platform_device.h>
	12	#include <linux/slab.h>
	13	#include <linux/thermal.h>
	14
d2bc4dd9	15	#include "thermal_hwmon.h"
e20db70d AH	16
	17	#define IMX_SC_MISC_FUNC_GET_TEMP 13
	18
	19	static struct imx_sc_ipc *thermal_ipc_handle;
	20
	21	struct imx_sc_sensor {
	22	struct thermal_zone_device *tzd;
	23	u32 resource_id;
	24	};
	25
	26	struct req_get_temp {
	27	u16 resource_id;
	28	u8 type;
1fd213f3	29	} __packed __aligned(4);
e20db70d AH	30
e20db70d AH	31	struct resp_get_temp {
968ea0df AH	32	s16 celsius;
968ea0df AH	33	s8 tenths;
1fd213f3	34	} __packed __aligned(4);
e20db70d AH	35
	36	struct imx_sc_msg_misc_get_temp {
	37	struct imx_sc_rpc_msg hdr;
	38	union {
	39	struct req_get_temp req;
	40	struct resp_get_temp resp;
	41	} data;
1fd213f3	42	} __packed __aligned(4);
e20db70d	43
32fb9a8a	44	static int imx_sc_thermal_get_temp(struct thermal_zone_device tz, int temp)
e20db70d AH	45	{
	46	struct imx_sc_msg_misc_get_temp msg;
	47	struct imx_sc_rpc_msg *hdr = &msg.hdr;
5f68d078	48	struct imx_sc_sensor *sensor = thermal_zone_device_priv(tz);
e20db70d AH	49	int ret;
	50
	51	msg.data.req.resource_id = sensor->resource_id;
	52	msg.data.req.type = IMX_SC_C_TEMP;
	53
	54	hdr->ver = IMX_SC_RPC_VERSION;
	55	hdr->svc = IMX_SC_RPC_SVC_MISC;
	56	hdr->func = IMX_SC_MISC_FUNC_GET_TEMP;
	57	hdr->size = 2;
	58
	59	ret = imx_scu_call_rpc(thermal_ipc_handle, &msg, true);
abda7383	60	if (ret)
e20db70d	61	return ret;
e20db70d AH	62
	63	temp = msg.data.resp.celsius 1000 + msg.data.resp.tenths * 100;
	64
	65	return 0;
	66	}
	67
32fb9a8a	68	static const struct thermal_zone_device_ops imx_sc_thermal_ops = {
e20db70d AH	69	.get_temp = imx_sc_thermal_get_temp,
	70	};
	71
	72	static int imx_sc_thermal_probe(struct platform_device *pdev)
	73	{
e20db70d	74	struct imx_sc_sensor *sensor;
31fd4b9d DL	75	const int *resource_id;
31fd4b9d DL	76	int i, ret;
e20db70d AH	77
	78	ret = imx_scu_get_handle(&thermal_ipc_handle);
	79	if (ret)
	80	return ret;
	81
31fd4b9d DL	82	resource_id = of_device_get_match_data(&pdev->dev);
	83	if (!resource_id)
	84	return -EINVAL;
e20db70d	85
4b26b7c9	86	for (i = 0; resource_id[i] >= 0; i++) {
e20db70d	87
e20db70d	88	sensor = devm_kzalloc(&pdev->dev, sizeof(*sensor), GFP_KERNEL);
31fd4b9d DL	89	if (!sensor)
31fd4b9d DL	90	return -ENOMEM;
e20db70d	91
31fd4b9d	92	sensor->resource_id = resource_id[i];
e20db70d	93
31fd4b9d DL	94	sensor->tzd = devm_thermal_of_zone_register(&pdev->dev, sensor->resource_id,
31fd4b9d DL	95	sensor, &imx_sc_thermal_ops);
e20db70d	96	if (IS_ERR(sensor->tzd)) {
31fd4b9d DL	97	/*
	98	* Save the error value before freeing the
	99	* sensor pointer, otherwise we endup with a
	100	* use-after-free error
	101	*/
e20db70d	102	ret = PTR_ERR(sensor->tzd);
31fd4b9d DL	103
	104	devm_kfree(&pdev->dev, sensor);
	105
	106	/*
	107	* The thermal framework notifies us there is
	108	* no thermal zone description for such a
	109	* sensor id
	110	*/
	111	if (ret == -ENODEV)
	112	continue;
	113
7d8abc5f	114	return dev_err_probe(&pdev->dev, ret, "failed to register thermal zone\n");
e20db70d	115	}
d2bc4dd9	116
b0526e02	117	devm_thermal_add_hwmon_sysfs(&pdev->dev, sensor->tzd);
e20db70d AH	118	}
e20db70d AH	119
31fd4b9d	120	return 0;
e20db70d AH	121	}
e20db70d AH	122
1cea9959 VS	123	static const int imx_sc_sensors[] = {
	124	IMX_SC_R_SYSTEM, IMX_SC_R_PMIC_0,
	125	IMX_SC_R_AP_0, IMX_SC_R_AP_1,
	126	IMX_SC_R_GPU_0_PID0, IMX_SC_R_GPU_1_PID0,
	127	IMX_SC_R_DRC_0, -1 };
31fd4b9d	128
e20db70d	129	static const struct of_device_id imx_sc_thermal_table[] = {
31fd4b9d	130	{ .compatible = "fsl,imx-sc-thermal", .data = imx_sc_sensors },
e20db70d AH	131	{}
	132	};
	133	MODULE_DEVICE_TABLE(of, imx_sc_thermal_table);
	134
	135	static struct platform_driver imx_sc_thermal_driver = {
	136	.probe = imx_sc_thermal_probe,
e20db70d AH	137	.driver = {
	138	.name = "imx-sc-thermal",
	139	.of_match_table = imx_sc_thermal_table,
	140	},
	141	};
	142	module_platform_driver(imx_sc_thermal_driver);
	143
	144	MODULE_AUTHOR("Anson Huang <Anson.Huang@nxp.com>");
	145	MODULE_DESCRIPTION("Thermal driver for NXP i.MX SoCs with system controller");
	146	MODULE_LICENSE("GPL v2");