Merge "drivers: thermal: Add support for RPM SMD cooling device"
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qctecmdr
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@ -102,6 +102,17 @@ config REGULATOR_COOLING_DEVICE
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If you want this support, you should say Y here.
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config QTI_RPM_SMD_COOLING_DEVICE
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bool "Qualcomm Technologies Inc. RPM SMD cooling device driver"
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depends on MSM_RPM_SMD && THERMAL_OF
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help
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This implements a mitigation device to send temperature band
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level to RPM hardware via SMD protocol. This mitigation device
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will be used by temperature reliability rules to restrict a
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railway at predefined voltage corner using RPM hardware.
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If you want this support, you should say Y here.
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config MSM_BCL_PERIPHERAL_CTL
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bool "BCL driver to control the PMIC BCL peripheral"
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depends on SPMI && THERMAL_OF
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@ -9,6 +9,7 @@ obj-$(CONFIG_QTI_QMI_COOLING_DEVICE) += thermal_mitigation_device_service_v01.o
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obj-$(CONFIG_QTI_THERMAL_LIMITS_DCVS) += msm_lmh_dcvs.o lmh_dbg.o
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obj-$(CONFIG_QTI_AOP_REG_COOLING_DEVICE) += regulator_aop_cdev.o
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obj-$(CONFIG_REGULATOR_COOLING_DEVICE) += regulator_cdev.o
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obj-$(CONFIG_QTI_RPM_SMD_COOLING_DEVICE) += rpm_smd_cooling_device.o
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obj-$(CONFIG_MSM_BCL_PERIPHERAL_CTL) += bcl_peripheral.o
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obj-$(CONFIG_QTI_CPU_ISOLATE_COOLING_DEVICE) += cpu_isolate.o
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obj-$(CONFIG_QTI_LMH_CPU_VDD_COOLING_DEVICE) += lmh_cpu_vdd_cdev.o
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200
drivers/thermal/qcom/rpm_smd_cooling_device.c
Normal file
200
drivers/thermal/qcom/rpm_smd_cooling_device.c
Normal file
@ -0,0 +1,200 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2018, 2021, The Linux Foundation. All rights reserved.
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*/
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#define pr_fmt(fmt) "%s:%s " fmt, KBUILD_MODNAME, __func__
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/thermal.h>
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#include <linux/err.h>
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#include <soc/qcom/rpm-smd.h>
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#define RPM_SMD_CDEV_DRIVER "rpm-smd-cooling-device"
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#define RPM_SMD_RES_TYPE 0x6d726874
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#define RPM_SMD_RES_ID 0
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#define RPM_SMD_KEY 1
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enum rpm_smd_temp_band {
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RPM_SMD_COLD_CRITICAL = 1,
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RPM_SMD_COLD,
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RPM_SMD_COOL,
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RPM_SMD_NORMAL,
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RPM_SMD_WARM,
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RPM_SMD_HOT,
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RPM_SMD_HOT_CRITICAL,
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RPM_SMD_TEMP_MAX_NR,
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};
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struct rpm_smd_cdev {
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struct thermal_cooling_device *cool_dev;
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char dev_name[THERMAL_NAME_LENGTH];
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unsigned int state;
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struct msm_rpm_request *rpm_handle;
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};
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static int rpm_smd_send_request_to_rpm(struct rpm_smd_cdev *rpm_smd_dev,
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unsigned int state)
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{
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unsigned int band;
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int msg_id, ret;
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if (!rpm_smd_dev || !rpm_smd_dev->rpm_handle) {
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pr_err("Invalid RPM SMD handle\n");
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return -EINVAL;
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}
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if (rpm_smd_dev->state == state)
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return 0;
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/* if state is zero, then send RPM_SMD_NORMAL band */
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if (!state)
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band = RPM_SMD_NORMAL;
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else
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band = state;
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ret = msm_rpm_add_kvp_data(rpm_smd_dev->rpm_handle, RPM_SMD_KEY,
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(const uint8_t *)&band, (int)sizeof(band));
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if (ret) {
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pr_err("Adding KVP data failed. err:%d\n", ret);
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return ret;
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}
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msg_id = msm_rpm_send_request(rpm_smd_dev->rpm_handle);
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if (!msg_id) {
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pr_err("RPM SMD send request failed\n");
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return -ENXIO;
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}
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ret = msm_rpm_wait_for_ack(msg_id);
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if (ret) {
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pr_err("RPM SMD wait for ACK failed. err:%d\n", ret);
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return ret;
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}
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rpm_smd_dev->state = state;
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pr_debug("Requested RPM SMD band:%d for %s\n", band,
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rpm_smd_dev->dev_name);
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return ret;
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}
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static int rpm_smd_get_max_state(struct thermal_cooling_device *cdev,
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unsigned long *state)
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{
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*state = RPM_SMD_TEMP_MAX_NR - 1;
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return 0;
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}
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static int rpm_smd_set_cur_state(struct thermal_cooling_device *cdev,
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unsigned long state)
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{
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struct rpm_smd_cdev *rpm_smd_dev = cdev->devdata;
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int ret = 0;
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if (state > (RPM_SMD_TEMP_MAX_NR - 1))
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state = RPM_SMD_TEMP_MAX_NR - 1;
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ret = rpm_smd_send_request_to_rpm(rpm_smd_dev, (unsigned int)state);
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if (ret)
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return ret;
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return ret;
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}
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static int rpm_smd_get_cur_state(struct thermal_cooling_device *cdev,
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unsigned long *state)
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{
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struct rpm_smd_cdev *rpm_smd_dev = cdev->devdata;
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*state = rpm_smd_dev->state;
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return 0;
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}
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static struct thermal_cooling_device_ops rpm_smd_device_ops = {
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.get_max_state = rpm_smd_get_max_state,
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.get_cur_state = rpm_smd_get_cur_state,
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.set_cur_state = rpm_smd_set_cur_state,
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};
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static int rpm_smd_cdev_remove(struct platform_device *pdev)
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{
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struct rpm_smd_cdev *rpm_smd_dev =
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(struct rpm_smd_cdev *)dev_get_drvdata(&pdev->dev);
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if (rpm_smd_dev) {
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if (rpm_smd_dev->cool_dev)
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thermal_cooling_device_unregister(
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rpm_smd_dev->cool_dev);
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rpm_smd_send_request_to_rpm(rpm_smd_dev, RPM_SMD_NORMAL);
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msm_rpm_free_request(rpm_smd_dev->rpm_handle);
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}
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return 0;
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}
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static int rpm_smd_cdev_probe(struct platform_device *pdev)
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{
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struct rpm_smd_cdev *rpm_smd_dev;
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int ret = 0;
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struct device_node *np;
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np = dev_of_node(&pdev->dev);
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if (!np) {
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dev_err(&pdev->dev,
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"of node not available for rpm smd cooling device\n");
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return -EINVAL;
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}
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rpm_smd_dev = devm_kzalloc(&pdev->dev, sizeof(*rpm_smd_dev),
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GFP_KERNEL);
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if (!rpm_smd_dev)
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return -ENOMEM;
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rpm_smd_dev->rpm_handle = msm_rpm_create_request(MSM_RPM_CTX_ACTIVE_SET,
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RPM_SMD_RES_TYPE, RPM_SMD_RES_ID, 1);
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if (!rpm_smd_dev->rpm_handle) {
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dev_err(&pdev->dev, "Creating RPM SMD request handle failed\n");
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return -ENXIO;
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}
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strlcpy(rpm_smd_dev->dev_name, np->name, THERMAL_NAME_LENGTH);
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/* Be pro-active and mitigate till we get first vote from TF */
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rpm_smd_send_request_to_rpm(rpm_smd_dev, RPM_SMD_COLD);
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rpm_smd_dev->cool_dev = thermal_of_cooling_device_register(
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np, rpm_smd_dev->dev_name, rpm_smd_dev,
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&rpm_smd_device_ops);
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if (IS_ERR(rpm_smd_dev->cool_dev)) {
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ret = PTR_ERR(rpm_smd_dev->cool_dev);
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dev_err(&pdev->dev, "rpm_smd cdev register err:%d\n", ret);
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rpm_smd_dev->cool_dev = NULL;
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return ret;
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}
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dev_set_drvdata(&pdev->dev, rpm_smd_dev);
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return ret;
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}
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static const struct of_device_id rpm_smd_cdev_of_match[] = {
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{.compatible = "qcom,rpm-smd-cooling-device", },
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{},
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};
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static struct platform_driver rpm_smd_cdev_driver = {
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.driver = {
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.name = RPM_SMD_CDEV_DRIVER,
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.of_match_table = rpm_smd_cdev_of_match,
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},
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.probe = rpm_smd_cdev_probe,
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.remove = rpm_smd_cdev_remove,
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};
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builtin_platform_driver(rpm_smd_cdev_driver);
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MODULE_LICENSE("GPL v2");
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