2018-11-26 17:09:29 +09:00
|
|
|
// SPDX-License-Identifier: GPL-2.0+
|
|
|
|
/*
|
|
|
|
* Copyright 2018 NXP.
|
|
|
|
*/
|
|
|
|
|
2019-08-07 09:43:25 +09:00
|
|
|
#include <linux/device_cooling.h>
|
2018-11-26 17:09:29 +09:00
|
|
|
#include <linux/err.h>
|
|
|
|
#include <linux/firmware/imx/sci.h>
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/of.h>
|
|
|
|
#include <linux/of_device.h>
|
|
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/thermal.h>
|
|
|
|
|
|
|
|
#include "thermal_core.h"
|
|
|
|
|
|
|
|
#define IMX_SC_MISC_FUNC_GET_TEMP 13
|
|
|
|
#define IMX_SC_C_TEMP 0
|
2019-08-07 09:43:25 +09:00
|
|
|
#define IMX_SC_TEMP_PASSIVE_COOL_DELTA 10000
|
2018-11-26 17:09:29 +09:00
|
|
|
|
|
|
|
static struct imx_sc_ipc *thermal_ipc_handle;
|
|
|
|
|
|
|
|
struct imx_sc_sensor {
|
|
|
|
struct thermal_zone_device *tzd;
|
|
|
|
u32 resource_id;
|
2019-08-07 09:43:25 +09:00
|
|
|
struct thermal_cooling_device *cdev;
|
|
|
|
int temp_passive;
|
|
|
|
int temp_critical;
|
2018-11-26 17:09:29 +09:00
|
|
|
};
|
|
|
|
|
|
|
|
struct imx_sc_thermal_data {
|
|
|
|
struct imx_sc_sensor *sensor;
|
|
|
|
};
|
|
|
|
|
2019-08-07 09:43:25 +09:00
|
|
|
/* The driver support 1 passive trip point and 1 critical trip point */
|
|
|
|
enum imx_thermal_trip {
|
|
|
|
IMX_TRIP_PASSIVE,
|
|
|
|
IMX_TRIP_CRITICAL,
|
|
|
|
IMX_TRIP_NUM,
|
|
|
|
};
|
|
|
|
|
2018-11-26 17:09:29 +09:00
|
|
|
struct req_get_temp {
|
|
|
|
u16 resource_id;
|
|
|
|
u8 type;
|
2019-11-20 18:23:54 +09:00
|
|
|
} __packed __aligned(4);
|
2018-11-26 17:09:29 +09:00
|
|
|
|
|
|
|
struct resp_get_temp {
|
2020-03-19 17:23:34 +09:00
|
|
|
s16 celsius;
|
|
|
|
s8 tenths;
|
2019-11-20 18:23:54 +09:00
|
|
|
} __packed __aligned(4);
|
2018-11-26 17:09:29 +09:00
|
|
|
|
|
|
|
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;
|
2019-11-20 18:23:54 +09:00
|
|
|
} __packed __aligned(4);
|
2018-11-26 17:09:29 +09:00
|
|
|
|
|
|
|
static int imx_sc_thermal_get_temp(void *data, int *temp)
|
|
|
|
{
|
|
|
|
struct imx_sc_msg_misc_get_temp msg;
|
|
|
|
struct imx_sc_rpc_msg *hdr = &msg.hdr;
|
|
|
|
struct imx_sc_sensor *sensor = data;
|
|
|
|
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) {
|
2019-06-11 14:03:35 +09:00
|
|
|
/*
|
|
|
|
* if the SS power domain is down, read temp will fail, so
|
|
|
|
* we can print error once and return 0 directly.
|
|
|
|
*/
|
|
|
|
pr_err_once("read temp sensor %d failed, could be SS NOT powered up,\
|
|
|
|
return 0 for this thermal zone, ret %d\n",
|
|
|
|
sensor->resource_id, ret);
|
|
|
|
*temp = 0;
|
|
|
|
return 0;
|
2018-11-26 17:09:29 +09:00
|
|
|
}
|
|
|
|
|
|
|
|
*temp = msg.data.resp.celsius * 1000 + msg.data.resp.tenths * 100;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2019-08-07 09:43:25 +09:00
|
|
|
static int imx_sc_thermal_get_trend(void *p, int trip, enum thermal_trend *trend)
|
|
|
|
{
|
|
|
|
int trip_temp;
|
|
|
|
struct imx_sc_sensor *sensor = p;
|
|
|
|
|
|
|
|
if (!sensor->tzd)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
trip_temp = (trip == IMX_TRIP_PASSIVE) ? sensor->temp_passive :
|
|
|
|
sensor->temp_critical;
|
|
|
|
|
|
|
|
if (sensor->tzd->temperature >=
|
|
|
|
(trip_temp - IMX_SC_TEMP_PASSIVE_COOL_DELTA))
|
|
|
|
*trend = THERMAL_TREND_RAISE_FULL;
|
|
|
|
else
|
|
|
|
*trend = THERMAL_TREND_DROP_FULL;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int imx_sc_thermal_set_trip_temp(void *p, int trip, int temp)
|
|
|
|
{
|
|
|
|
struct imx_sc_sensor *sensor = p;
|
|
|
|
|
|
|
|
if (trip == IMX_TRIP_CRITICAL)
|
|
|
|
sensor->temp_critical = temp;
|
|
|
|
|
|
|
|
if (trip == IMX_TRIP_PASSIVE)
|
|
|
|
sensor->temp_passive = temp;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2018-11-26 17:09:29 +09:00
|
|
|
static const struct thermal_zone_of_device_ops imx_sc_thermal_ops = {
|
|
|
|
.get_temp = imx_sc_thermal_get_temp,
|
2019-08-07 09:43:25 +09:00
|
|
|
.get_trend = imx_sc_thermal_get_trend,
|
|
|
|
.set_trip_temp = imx_sc_thermal_set_trip_temp,
|
2018-11-26 17:09:29 +09:00
|
|
|
};
|
|
|
|
|
|
|
|
static int imx_sc_thermal_register_sensor(struct platform_device *pdev,
|
|
|
|
struct imx_sc_sensor *sensor)
|
|
|
|
{
|
|
|
|
struct thermal_zone_device *tzd;
|
|
|
|
|
|
|
|
tzd = devm_thermal_zone_of_sensor_register(&pdev->dev,
|
|
|
|
sensor->resource_id,
|
|
|
|
sensor,
|
|
|
|
&imx_sc_thermal_ops);
|
|
|
|
if (IS_ERR(tzd)) {
|
|
|
|
dev_err(&pdev->dev, "failed to register sensor: %d\n",
|
|
|
|
sensor->resource_id);
|
|
|
|
return PTR_ERR(tzd);
|
|
|
|
}
|
|
|
|
|
|
|
|
sensor->tzd = tzd;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int imx_sc_thermal_get_sensor_id(struct device_node *sensor_np, u32 *id)
|
|
|
|
{
|
|
|
|
struct of_phandle_args sensor_specs;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
ret = of_parse_phandle_with_args(sensor_np, "thermal-sensors",
|
|
|
|
"#thermal-sensor-cells",
|
|
|
|
0, &sensor_specs);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
if (sensor_specs.args_count >= 1) {
|
|
|
|
*id = sensor_specs.args[0];
|
|
|
|
WARN(sensor_specs.args_count > 1,
|
|
|
|
"%pOFn: too many cells in sensor specifier %d\n",
|
|
|
|
sensor_specs.np, sensor_specs.args_count);
|
|
|
|
} else {
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int imx_sc_thermal_probe(struct platform_device *pdev)
|
|
|
|
{
|
|
|
|
struct device_node *np = pdev->dev.of_node;
|
|
|
|
struct device_node *sensor_np = NULL;
|
|
|
|
struct imx_sc_thermal_data *data;
|
|
|
|
struct imx_sc_sensor *sensors;
|
2019-08-07 09:43:25 +09:00
|
|
|
const struct thermal_trip *trip;
|
2018-11-26 17:09:29 +09:00
|
|
|
u32 sensor_num;
|
|
|
|
int ret, i;
|
|
|
|
|
|
|
|
ret = imx_scu_get_handle(&thermal_ipc_handle);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
|
|
|
|
if (!data)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
ret = of_property_read_u32(np, "tsens-num", &sensor_num);
|
|
|
|
if (ret || !sensor_num) {
|
|
|
|
dev_err(&pdev->dev, "failed to get valid temp sensor number!\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
sensors = devm_kzalloc(&pdev->dev, sizeof(*data->sensor) * sensor_num,
|
|
|
|
GFP_KERNEL);
|
|
|
|
if (!sensors)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
data->sensor = sensors;
|
|
|
|
|
|
|
|
np = of_find_node_by_name(NULL, "thermal-zones");
|
|
|
|
if (!np)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
for (i = 0; i < sensor_num; i++) {
|
|
|
|
struct imx_sc_sensor *sensor = &data->sensor[i];
|
|
|
|
|
|
|
|
sensor_np = of_get_next_child(np, sensor_np);
|
|
|
|
ret = imx_sc_thermal_get_sensor_id(sensor_np, &sensor->resource_id);
|
|
|
|
if (ret < 0) {
|
|
|
|
dev_err(&pdev->dev,
|
|
|
|
"failed to get valid sensor resource id: %d\n",
|
|
|
|
ret);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = imx_sc_thermal_register_sensor(pdev, sensor);
|
|
|
|
if (ret) {
|
|
|
|
dev_err(&pdev->dev, "failed to register thermal sensor: %d\n",
|
|
|
|
ret);
|
|
|
|
break;
|
|
|
|
}
|
2019-08-07 09:43:25 +09:00
|
|
|
trip = of_thermal_get_trip_points(sensor->tzd);
|
|
|
|
sensor->temp_passive = trip[0].temperature;
|
|
|
|
sensor->temp_critical = trip[1].temperature;
|
|
|
|
|
2019-11-05 10:53:32 +09:00
|
|
|
sensor->cdev = devfreq_cooling_register();
|
|
|
|
if (IS_ERR(sensor->cdev)) {
|
|
|
|
dev_err(&pdev->dev,
|
|
|
|
"failed to register devfreq cooling device: %d\n",
|
|
|
|
ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = thermal_zone_bind_cooling_device(sensor->tzd,
|
|
|
|
IMX_TRIP_PASSIVE,
|
|
|
|
sensor->cdev,
|
|
|
|
THERMAL_NO_LIMIT,
|
|
|
|
THERMAL_NO_LIMIT,
|
|
|
|
THERMAL_WEIGHT_DEFAULT);
|
|
|
|
if (ret) {
|
|
|
|
dev_err(&sensor->tzd->device,
|
|
|
|
"binding zone %s with cdev %s failed:%d\n",
|
|
|
|
sensor->tzd->type, sensor->cdev->type, ret);
|
|
|
|
devfreq_cooling_unregister(sensor->cdev);
|
|
|
|
return ret;
|
2019-08-07 09:43:25 +09:00
|
|
|
}
|
2018-11-26 17:09:29 +09:00
|
|
|
}
|
|
|
|
|
|
|
|
of_node_put(np);
|
|
|
|
of_node_put(sensor_np);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct of_device_id imx_sc_thermal_table[] = {
|
|
|
|
{ .compatible = "fsl,imx8qxp-sc-thermal", },
|
2019-06-11 14:03:35 +09:00
|
|
|
{ .compatible = "fsl,imx8qm-sc-thermal", },
|
2018-11-26 17:09:29 +09:00
|
|
|
{}
|
|
|
|
};
|
|
|
|
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");
|