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f6a756e8fb
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Signed-off-by: Rob Herring <robh@kernel.org> Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
148 lines
3.3 KiB
C
148 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2018-2020 NXP.
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*/
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#include <dt-bindings/firmware/imx/rsrc.h>
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#include <linux/err.h>
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#include <linux/firmware/imx/sci.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/thermal.h>
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#include "thermal_hwmon.h"
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#define IMX_SC_MISC_FUNC_GET_TEMP 13
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static struct imx_sc_ipc *thermal_ipc_handle;
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struct imx_sc_sensor {
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struct thermal_zone_device *tzd;
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u32 resource_id;
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};
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struct req_get_temp {
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u16 resource_id;
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u8 type;
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} __packed __aligned(4);
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struct resp_get_temp {
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s16 celsius;
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s8 tenths;
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} __packed __aligned(4);
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struct imx_sc_msg_misc_get_temp {
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struct imx_sc_rpc_msg hdr;
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union {
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struct req_get_temp req;
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struct resp_get_temp resp;
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} data;
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} __packed __aligned(4);
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static int imx_sc_thermal_get_temp(struct thermal_zone_device *tz, int *temp)
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{
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struct imx_sc_msg_misc_get_temp msg;
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struct imx_sc_rpc_msg *hdr = &msg.hdr;
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struct imx_sc_sensor *sensor = thermal_zone_device_priv(tz);
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int ret;
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msg.data.req.resource_id = sensor->resource_id;
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msg.data.req.type = IMX_SC_C_TEMP;
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hdr->ver = IMX_SC_RPC_VERSION;
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hdr->svc = IMX_SC_RPC_SVC_MISC;
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hdr->func = IMX_SC_MISC_FUNC_GET_TEMP;
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hdr->size = 2;
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ret = imx_scu_call_rpc(thermal_ipc_handle, &msg, true);
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if (ret)
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return ret;
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*temp = msg.data.resp.celsius * 1000 + msg.data.resp.tenths * 100;
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return 0;
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}
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static const struct thermal_zone_device_ops imx_sc_thermal_ops = {
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.get_temp = imx_sc_thermal_get_temp,
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};
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static int imx_sc_thermal_probe(struct platform_device *pdev)
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{
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struct imx_sc_sensor *sensor;
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const int *resource_id;
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int i, ret;
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ret = imx_scu_get_handle(&thermal_ipc_handle);
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if (ret)
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return ret;
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resource_id = of_device_get_match_data(&pdev->dev);
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if (!resource_id)
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return -EINVAL;
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for (i = 0; resource_id[i] >= 0; i++) {
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sensor = devm_kzalloc(&pdev->dev, sizeof(*sensor), GFP_KERNEL);
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if (!sensor)
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return -ENOMEM;
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sensor->resource_id = resource_id[i];
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sensor->tzd = devm_thermal_of_zone_register(&pdev->dev, sensor->resource_id,
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sensor, &imx_sc_thermal_ops);
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if (IS_ERR(sensor->tzd)) {
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/*
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* Save the error value before freeing the
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* sensor pointer, otherwise we endup with a
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* use-after-free error
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*/
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ret = PTR_ERR(sensor->tzd);
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devm_kfree(&pdev->dev, sensor);
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/*
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* The thermal framework notifies us there is
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* no thermal zone description for such a
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* sensor id
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*/
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if (ret == -ENODEV)
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continue;
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dev_err(&pdev->dev, "failed to register thermal zone\n");
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return ret;
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}
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devm_thermal_add_hwmon_sysfs(&pdev->dev, sensor->tzd);
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}
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return 0;
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}
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static const int imx_sc_sensors[] = {
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IMX_SC_R_SYSTEM, IMX_SC_R_PMIC_0,
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IMX_SC_R_AP_0, IMX_SC_R_AP_1,
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IMX_SC_R_GPU_0_PID0, IMX_SC_R_GPU_1_PID0,
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IMX_SC_R_DRC_0, -1 };
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static const struct of_device_id imx_sc_thermal_table[] = {
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{ .compatible = "fsl,imx-sc-thermal", .data = imx_sc_sensors },
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{}
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};
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MODULE_DEVICE_TABLE(of, imx_sc_thermal_table);
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static struct platform_driver imx_sc_thermal_driver = {
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.probe = imx_sc_thermal_probe,
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.driver = {
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.name = "imx-sc-thermal",
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.of_match_table = imx_sc_thermal_table,
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},
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};
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module_platform_driver(imx_sc_thermal_driver);
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MODULE_AUTHOR("Anson Huang <Anson.Huang@nxp.com>");
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MODULE_DESCRIPTION("Thermal driver for NXP i.MX SoCs with system controller");
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MODULE_LICENSE("GPL v2");
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