149 строки
3.3 KiB
C
149 строки
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright 2018-2020 NXP.
|
|
*/
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/firmware/imx/sci.h>
|
|
#include <linux/firmware/imx/types.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
|
|
|
|
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 {
|
|
u16 celsius;
|
|
u8 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(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) {
|
|
dev_err(&sensor->tzd->device, "read temp sensor %d failed, ret %d\n",
|
|
sensor->resource_id, ret);
|
|
return ret;
|
|
}
|
|
|
|
*temp = msg.data.resp.celsius * 1000 + msg.data.resp.tenths * 100;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct thermal_zone_of_device_ops imx_sc_thermal_ops = {
|
|
.get_temp = imx_sc_thermal_get_temp,
|
|
};
|
|
|
|
static int imx_sc_thermal_probe(struct platform_device *pdev)
|
|
{
|
|
struct device_node *np, *child, *sensor_np;
|
|
struct imx_sc_sensor *sensor;
|
|
int ret;
|
|
|
|
ret = imx_scu_get_handle(&thermal_ipc_handle);
|
|
if (ret)
|
|
return ret;
|
|
|
|
np = of_find_node_by_name(NULL, "thermal-zones");
|
|
if (!np)
|
|
return -ENODEV;
|
|
|
|
sensor_np = of_node_get(pdev->dev.of_node);
|
|
|
|
for_each_available_child_of_node(np, child) {
|
|
sensor = devm_kzalloc(&pdev->dev, sizeof(*sensor), GFP_KERNEL);
|
|
if (!sensor) {
|
|
of_node_put(sensor_np);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ret = thermal_zone_of_get_sensor_id(child,
|
|
sensor_np,
|
|
&sensor->resource_id);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev,
|
|
"failed to get valid sensor resource id: %d\n",
|
|
ret);
|
|
break;
|
|
}
|
|
|
|
sensor->tzd = devm_thermal_zone_of_sensor_register(&pdev->dev,
|
|
sensor->resource_id,
|
|
sensor,
|
|
&imx_sc_thermal_ops);
|
|
if (IS_ERR(sensor->tzd)) {
|
|
dev_err(&pdev->dev, "failed to register thermal zone\n");
|
|
ret = PTR_ERR(sensor->tzd);
|
|
break;
|
|
}
|
|
}
|
|
|
|
of_node_put(sensor_np);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int imx_sc_thermal_remove(struct platform_device *pdev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id imx_sc_thermal_table[] = {
|
|
{ .compatible = "fsl,imx-sc-thermal", },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, imx_sc_thermal_table);
|
|
|
|
static struct platform_driver imx_sc_thermal_driver = {
|
|
.probe = imx_sc_thermal_probe,
|
|
.remove = imx_sc_thermal_remove,
|
|
.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");
|