2017-06-05 23:53:24 -06:00
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/*
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2018-03-06 00:37:10 -07:00
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* Copyright 2017-2018 NXP.
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2017-06-05 23:53:24 -06:00
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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2017-09-08 02:04:25 -06:00
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#include <linux/device_cooling.h>
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2017-06-05 23:53:24 -06:00
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#include <linux/platform_device.h>
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#include <linux/pm.h>
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#include <linux/slab.h>
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#include <linux/thermal.h>
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#include <soc/imx8/sc/sci.h>
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2017-09-05 03:28:58 -06:00
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#include "thermal_core.h"
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2017-09-21 22:06:09 -06:00
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#define IMX_SC_TEMP_PASSIVE_COOL_DELTA 10000
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2017-06-05 23:53:24 -06:00
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struct imx_sc_sensor {
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struct thermal_zone_device *tzd;
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2017-09-05 03:28:58 -06:00
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struct thermal_cooling_device *cdev;
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2017-06-05 23:53:24 -06:00
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sc_rsrc_t hw_id;
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2017-09-05 03:28:58 -06:00
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int temp_passive;
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int temp_critical;
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2017-06-05 23:53:24 -06:00
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};
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struct imx_sc_tsens_device {
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u32 sensor_num;
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struct imx_sc_sensor sensor[0];
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};
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/* The driver support 1 passive trip point and 1 critical trip point */
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enum imx_thermal_trip {
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IMX_TRIP_PASSIVE,
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IMX_TRIP_CRITICAL,
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IMX_TRIP_NUM,
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};
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static const sc_rsrc_t imx8qm_sensor_hw_id[] = {
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SC_R_A53, SC_R_A72, SC_R_GPU_0_PID0, SC_R_GPU_1_PID0,
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2018-03-06 01:33:09 -07:00
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SC_R_DRC_0, SC_R_PMIC_0, SC_R_PMIC_1, SC_R_PMIC_2,
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2017-06-05 23:53:24 -06:00
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};
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static const sc_rsrc_t imx8qxp_sensor_hw_id[] = {
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2018-03-06 00:39:46 -07:00
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SC_R_SYSTEM, SC_R_DRC_0, SC_R_PMIC_0,
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SC_R_PMIC_1, SC_R_PMIC_2,
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2017-06-05 23:53:24 -06:00
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};
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const int *sensor_hw_id;
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sc_ipc_t tsens_ipcHandle;
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static int imx_sc_tsens_get_temp(void *data, int *temp)
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{
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struct imx_sc_sensor *sensor = data;
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sc_err_t sciErr;
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int16_t celsius;
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int8_t tenths;
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sciErr = sc_misc_get_temp(tsens_ipcHandle, sensor->hw_id,
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SC_C_TEMP, &celsius, &tenths);
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/*
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* if the SS power domain is down, read temp will fail, so
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2017-08-29 20:42:07 -06:00
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* we can return the temp of CPU domain instead.
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2017-06-05 23:53:24 -06:00
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*/
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if (sciErr != SC_ERR_NONE) {
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2017-08-29 20:42:07 -06:00
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sciErr = sc_misc_get_temp(tsens_ipcHandle,
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sensor_hw_id[topology_physical_package_id(smp_processor_id())],
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SC_C_TEMP, &celsius, &tenths);
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2017-06-05 23:53:24 -06:00
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if (sciErr != SC_ERR_NONE) {
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pr_err("read temp sensor:%d failed\n", sensor->hw_id);
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return -EINVAL;
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}
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}
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2018-06-11 09:41:46 -06:00
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*temp = celsius * 1000 + tenths * 100;
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2017-06-05 23:53:24 -06:00
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return 0;
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}
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static int imx_sc_tsens_get_trend(void *p, int trip, enum thermal_trend *trend)
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{
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2017-09-05 03:28:58 -06:00
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int trip_temp;
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struct imx_sc_sensor *sensor = p;
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if (!sensor->tzd)
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return 0;
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trip_temp = (trip == IMX_TRIP_PASSIVE) ? sensor->temp_passive :
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sensor->temp_critical;
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2017-09-21 22:06:09 -06:00
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if (sensor->tzd->temperature >=
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(trip_temp - IMX_SC_TEMP_PASSIVE_COOL_DELTA))
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2017-09-05 03:28:58 -06:00
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*trend = THERMAL_TREND_RAISE_FULL;
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else
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*trend = THERMAL_TREND_DROP_FULL;
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2017-06-05 23:53:24 -06:00
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return 0;
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}
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2017-09-05 03:28:58 -06:00
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static int imx_sc_set_trip_temp(void *p, int trip,
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int temp)
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{
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struct imx_sc_sensor *sensor = p;
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if (trip == IMX_TRIP_CRITICAL)
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sensor->temp_critical = temp;
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if (trip == IMX_TRIP_PASSIVE)
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sensor->temp_passive = temp;
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return 0;
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}
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2017-06-05 23:53:24 -06:00
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static const struct thermal_zone_of_device_ops imx_sc_tsens_ops = {
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.get_temp = imx_sc_tsens_get_temp,
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.get_trend = imx_sc_tsens_get_trend,
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2017-09-05 03:28:58 -06:00
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.set_trip_temp = imx_sc_set_trip_temp,
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2017-06-05 23:53:24 -06:00
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};
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static const struct of_device_id imx_sc_tsens_table[] = {
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{ .compatible = "nxp,imx8qm-sc-tsens", .data = &imx8qm_sensor_hw_id, },
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{ .compatible = "nxp,imx8qxp-sc-tsens", .data = &imx8qxp_sensor_hw_id, },
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{},
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};
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MODULE_DEVICE_TABLE(of, imx_sc_tsens_table);
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static int imx_sc_tsens_probe(struct platform_device *pdev)
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{
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2018-06-25 23:45:28 -06:00
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struct device_node *tz_np, *child_tz_np = NULL;
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2017-06-05 23:53:24 -06:00
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struct device_node *np = pdev->dev.of_node;
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struct imx_sc_tsens_device *tsens_dev;
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struct imx_sc_sensor *sensor;
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2017-09-05 03:28:58 -06:00
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const struct thermal_trip *trip;
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2017-06-05 23:53:24 -06:00
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struct thermal_zone_device *tzd;
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sc_err_t sciErr;
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uint32_t mu_id;
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u32 tsens_num;
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int ret, sensor_id;
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sciErr = sc_ipc_getMuID(&mu_id);
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if (sciErr != SC_ERR_NONE) {
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dev_err(&pdev->dev, "Can not get the mu id: %d\n", sciErr);
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return -ENODEV;
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};
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sciErr = sc_ipc_open(&tsens_ipcHandle, mu_id);
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if (sciErr != SC_ERR_NONE) {
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dev_err(&pdev->dev, "open mu channel failed: %d\n", sciErr);
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return -EINVAL;
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};
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sensor_hw_id = of_device_get_match_data(&pdev->dev);
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/* get the temp sensor number from device node */
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of_property_read_u32(np, "tsens-num", &tsens_num);
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if (!tsens_num) {
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dev_err(&pdev->dev, "no temp sensor number provided!\n");
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return -EINVAL;
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}
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tsens_dev = devm_kzalloc(&pdev->dev, sizeof(*tsens_dev) +
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tsens_num * sizeof(*sensor), GFP_KERNEL);
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if (!tsens_dev)
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return -ENOMEM;
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tsens_dev->sensor_num = tsens_num;
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2018-06-25 23:45:28 -06:00
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tz_np = of_find_node_by_name(NULL, "thermal-zones");
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if (!tz_np)
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return -ENODEV;
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2017-06-05 23:53:24 -06:00
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for (sensor_id = 0; sensor_id < tsens_num; sensor_id++) {
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2018-06-25 23:45:28 -06:00
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child_tz_np = of_get_next_child(tz_np, child_tz_np);
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if (!of_device_is_available(child_tz_np))
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continue;
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2017-06-05 23:53:24 -06:00
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sensor = &tsens_dev->sensor[sensor_id];
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sensor->hw_id = sensor_hw_id[sensor_id];
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tzd = devm_thermal_zone_of_sensor_register(&pdev->dev, sensor_id, sensor,
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&imx_sc_tsens_ops);
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if (IS_ERR(tzd)) {
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dev_err(&pdev->dev, "failed to register temp sensor: %d\n", sensor_id);
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ret = -EINVAL;
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goto failed;
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}
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sensor->tzd = tzd;
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2017-09-05 03:28:58 -06:00
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trip = of_thermal_get_trip_points(sensor->tzd);
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sensor->temp_passive = trip[0].temperature;
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sensor->temp_critical = trip[1].temperature;
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2017-09-08 02:04:25 -06:00
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sensor->cdev = devfreq_cooling_register();
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if (IS_ERR(sensor->cdev)) {
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dev_err(&pdev->dev,
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"failed to register devfreq cooling device: %d\n",
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ret);
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goto failed;
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}
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ret = thermal_zone_bind_cooling_device(sensor->tzd,
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IMX_TRIP_PASSIVE,
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sensor->cdev,
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THERMAL_NO_LIMIT,
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THERMAL_NO_LIMIT,
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THERMAL_WEIGHT_DEFAULT);
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if (ret) {
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dev_err(&sensor->tzd->device,
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"binding zone %s with cdev %s failed:%d\n",
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sensor->tzd->type, sensor->cdev->type, ret);
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devfreq_cooling_unregister(sensor->cdev);
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goto failed;
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}
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2017-06-05 23:53:24 -06:00
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}
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return 0;
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failed:
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return ret;
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}
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static int imx_sc_tsens_remove(struct platform_device *pdev)
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{
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return 0;
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}
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static struct platform_driver imx_sc_tsens_driver = {
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.probe = imx_sc_tsens_probe,
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.remove = imx_sc_tsens_remove,
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.driver = {
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2018-06-20 18:59:14 -06:00
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.name = "imx-sc-thermal",
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2017-06-05 23:53:24 -06:00
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.of_match_table = imx_sc_tsens_table,
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},
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};
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module_platform_driver(imx_sc_tsens_driver);
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MODULE_AUTHOR("Jacky Bai<ping.bai@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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