forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
152 lines
3.4 KiB
152 lines
3.4 KiB
// 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/of_device.h> |
|
#include <linux/platform_device.h> |
|
#include <linux/slab.h> |
|
#include <linux/thermal.h> |
|
|
|
#include "thermal_core.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(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; |
|
} |
|
|
|
if (devm_thermal_add_hwmon_sysfs(sensor->tzd)) |
|
dev_warn(&pdev->dev, "failed to add hwmon sysfs attributes\n"); |
|
} |
|
|
|
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 <[email protected]>"); |
|
MODULE_DESCRIPTION("Thermal driver for NXP i.MX SoCs with system controller"); |
|
MODULE_LICENSE("GPL v2");
|
|
|