mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
synced 2024-12-29 09:12:07 +00:00
7d8abc5f3b
This adds the error code to the error message and also stores that message in case of probe deferral. Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com> Link: https://lore.kernel.org/r/20240717085517.3333385-1-alexander.stein@ew.tq-group.com Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
147 lines
3.3 KiB
C
147 lines
3.3 KiB
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");
|