Loading Documentation/devicetree/bindings/thermal/qti-rpmh-reg-cdev.txt 0 → 100644 +44 −0 Original line number Diff line number Diff line RPMh regulator cooling device. The RPMh regulator cooling device, will be used to place a voltage floor restriction on a rail. This cooling device will use a QMP AOP mail box to send the message to apply and clear voltage floor restriction. The cooling device node should be a child of the regulator devicetree node, which it is trying to place the floor restriction. Properties: - compatible: Usage: required Value type: <string> Definition: shall be "qcom,rpmh-reg-cdev" - qcom,reg-resource-name: Usage: required Value type: <string> Definition: The regulator resource name to be used for communicating with RPMh. This value should be any of the below resource name, cx -> For CX rail, mx -> For MX rail, ebi -> For EBI rail. - mboxes: Usage: required Value type: <phandle> Definition: A phandle to the QMP AOP mail box, that needs to be used for sending the floor restriction message. - #cooling-cells: Must be 2. Please refer to <devicetree/bindings/thermal/thermal.txt> for more details. Example: vdd_cx: rpmh-cx-regulator-cdev { compatible = "qcom,rpmh-reg-cdev"; mboxes = <&qmp_aop 0>; qcom,reg-resource-name = "cx"; #cooling-cells = <2>; }; drivers/thermal/qcom/Kconfig +9 −0 Original line number Diff line number Diff line Loading @@ -40,3 +40,12 @@ config QTI_VIRTUAL_SENSOR The virtual sensor information includes the underlying thermal sensors to query for temperature and the aggregation logic to determine the virtual sensor temperature. config QTI_REG_COOLING_DEVICE bool "QTI Regulator cooling device" depends on THERMAL_OF && MSM_QMP help This enables the Regulator cooling device. This cooling device will be used by QTI chipset to place a floor voltage restriction at low temperatures. The regulator cooling device will message the AOP using mail box to establish the floor voltage. drivers/thermal/qcom/Makefile +1 −0 Original line number Diff line number Diff line Loading @@ -3,3 +3,4 @@ qcom_tsens-y += tsens.o tsens-common.o tsens-8916.o tsens-8974.o tsens-8960.o obj-$(CONFIG_MSM_BCL_PERIPHERAL_CTL) += bcl_peripheral.o obj-$(CONFIG_QTI_THERMAL_LIMITS_DCVS) += msm_lmh_dcvs.o obj-$(CONFIG_QTI_VIRTUAL_SENSOR) += qti_virtual_sensor.o obj-$(CONFIG_QTI_REG_COOLING_DEVICE) += regulator_cooling.o drivers/thermal/qcom/regulator_cooling.c 0 → 100644 +224 −0 Original line number Diff line number Diff line /* Copyright (c) 2017, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/module.h> #include <linux/platform_device.h> #include <linux/thermal.h> #include <linux/err.h> #include <linux/slab.h> #include <linux/mailbox_client.h> #define REG_CDEV_DRIVER "reg-cooling-device" #define REG_MSG_FORMAT "{class:volt_flr, event:zero_temp, res:%s, value:%s}" #define REG_CDEV_MAX_STATE 1 #define MBOX_TOUT_MS 1000 #define REG_MSG_MAX_LEN 100 struct reg_cooling_device { struct thermal_cooling_device *cdev; unsigned int min_state; const char *resource_name; struct mbox_chan *qmp_chan; struct mbox_client *client; }; struct aop_msg { uint32_t len; void *msg; }; enum regulator_rail_type { REG_COOLING_CX, REG_COOLING_MX, REG_COOLING_EBI, REG_COOLING_NR, }; static char *regulator_rail[REG_COOLING_NR] = { "cx", "mx", "ebi", }; static int aop_send_msg(struct reg_cooling_device *reg_dev, int min_state) { char msg_buf[REG_MSG_MAX_LEN] = {0}; int ret = 0; struct aop_msg msg; if (!reg_dev->qmp_chan) { pr_err("mbox not initialized for resource:%s\n", reg_dev->resource_name); return -EINVAL; } ret = snprintf(msg_buf, REG_MSG_MAX_LEN, REG_MSG_FORMAT, reg_dev->resource_name, (min_state == REG_CDEV_MAX_STATE) ? "off" : "on"); if (ret >= REG_MSG_MAX_LEN) { pr_err("Message too long for resource:%s\n", reg_dev->resource_name); return -E2BIG; } msg.len = REG_MSG_MAX_LEN; msg.msg = msg_buf; ret = mbox_send_message(reg_dev->qmp_chan, &msg); return (ret < 0) ? ret : 0; } static int reg_get_max_state(struct thermal_cooling_device *cdev, unsigned long *state) { *state = REG_CDEV_MAX_STATE; return 0; } static int reg_get_min_state(struct thermal_cooling_device *cdev, unsigned long *state) { struct reg_cooling_device *reg_dev = cdev->devdata; *state = reg_dev->min_state; return 0; } static int reg_send_min_state(struct thermal_cooling_device *cdev, unsigned long state) { struct reg_cooling_device *reg_dev = cdev->devdata; int ret = 0; if (state > REG_CDEV_MAX_STATE) state = REG_CDEV_MAX_STATE; if (reg_dev->min_state == state) return ret; ret = aop_send_msg(reg_dev, state); if (ret) { pr_err("regulator:%s switching to floor %lu error. err:%d\n", reg_dev->resource_name, state, ret); } else { pr_debug("regulator:%s switched to %lu from %d\n", reg_dev->resource_name, state, reg_dev->min_state); reg_dev->min_state = state; } return ret; } static int reg_get_cur_state(struct thermal_cooling_device *cdev, unsigned long *state) { *state = 0; return 0; } static int reg_send_cur_state(struct thermal_cooling_device *cdev, unsigned long state) { return 0; } static struct thermal_cooling_device_ops reg_dev_ops = { .get_max_state = reg_get_max_state, .get_cur_state = reg_get_cur_state, .set_cur_state = reg_send_cur_state, .set_min_state = reg_send_min_state, .get_min_state = reg_get_min_state, }; static int reg_init_mbox(struct platform_device *pdev, struct reg_cooling_device *reg_dev) { reg_dev->client = devm_kzalloc(&pdev->dev, sizeof(*reg_dev->client), GFP_KERNEL); if (!reg_dev->client) return -ENOMEM; reg_dev->client->dev = &pdev->dev; reg_dev->client->tx_block = true; reg_dev->client->tx_tout = MBOX_TOUT_MS; reg_dev->client->knows_txdone = false; reg_dev->qmp_chan = mbox_request_channel(reg_dev->client, 0); if (IS_ERR(reg_dev->qmp_chan)) { dev_err(&pdev->dev, "Mbox request failed. err:%ld\n", PTR_ERR(reg_dev->qmp_chan)); return PTR_ERR(reg_dev->qmp_chan); } return 0; } static int reg_dev_probe(struct platform_device *pdev) { int ret = 0, idx = 0; struct reg_cooling_device *reg_dev = NULL; reg_dev = devm_kzalloc(&pdev->dev, sizeof(*reg_dev), GFP_KERNEL); if (!reg_dev) return -ENOMEM; ret = reg_init_mbox(pdev, reg_dev); if (ret) return ret; ret = of_property_read_string(pdev->dev.of_node, "qcom,reg-resource-name", ®_dev->resource_name); if (ret) { dev_err(&pdev->dev, "Error reading resource name. err:%d\n", ret); goto mbox_free; } for (idx = 0; idx < REG_COOLING_NR; idx++) { if (!strcmp(reg_dev->resource_name, regulator_rail[idx])) break; } if (idx == REG_COOLING_NR) { dev_err(&pdev->dev, "Invalid regulator resource name:%s\n", reg_dev->resource_name); ret = -EINVAL; goto mbox_free; } reg_dev->min_state = REG_CDEV_MAX_STATE; reg_dev->cdev = thermal_of_cooling_device_register( pdev->dev.of_node, (char *)reg_dev->resource_name, reg_dev, ®_dev_ops); if (IS_ERR(reg_dev->cdev)) goto mbox_free; return ret; mbox_free: mbox_free_channel(reg_dev->qmp_chan); return ret; } static const struct of_device_id reg_dev_of_match[] = { {.compatible = "qcom,rpmh-reg-cdev", }, {} }; static struct platform_driver reg_dev_driver = { .driver = { .name = REG_CDEV_DRIVER, .of_match_table = reg_dev_of_match, }, .probe = reg_dev_probe, }; builtin_platform_driver(reg_dev_driver); Loading
Documentation/devicetree/bindings/thermal/qti-rpmh-reg-cdev.txt 0 → 100644 +44 −0 Original line number Diff line number Diff line RPMh regulator cooling device. The RPMh regulator cooling device, will be used to place a voltage floor restriction on a rail. This cooling device will use a QMP AOP mail box to send the message to apply and clear voltage floor restriction. The cooling device node should be a child of the regulator devicetree node, which it is trying to place the floor restriction. Properties: - compatible: Usage: required Value type: <string> Definition: shall be "qcom,rpmh-reg-cdev" - qcom,reg-resource-name: Usage: required Value type: <string> Definition: The regulator resource name to be used for communicating with RPMh. This value should be any of the below resource name, cx -> For CX rail, mx -> For MX rail, ebi -> For EBI rail. - mboxes: Usage: required Value type: <phandle> Definition: A phandle to the QMP AOP mail box, that needs to be used for sending the floor restriction message. - #cooling-cells: Must be 2. Please refer to <devicetree/bindings/thermal/thermal.txt> for more details. Example: vdd_cx: rpmh-cx-regulator-cdev { compatible = "qcom,rpmh-reg-cdev"; mboxes = <&qmp_aop 0>; qcom,reg-resource-name = "cx"; #cooling-cells = <2>; };
drivers/thermal/qcom/Kconfig +9 −0 Original line number Diff line number Diff line Loading @@ -40,3 +40,12 @@ config QTI_VIRTUAL_SENSOR The virtual sensor information includes the underlying thermal sensors to query for temperature and the aggregation logic to determine the virtual sensor temperature. config QTI_REG_COOLING_DEVICE bool "QTI Regulator cooling device" depends on THERMAL_OF && MSM_QMP help This enables the Regulator cooling device. This cooling device will be used by QTI chipset to place a floor voltage restriction at low temperatures. The regulator cooling device will message the AOP using mail box to establish the floor voltage.
drivers/thermal/qcom/Makefile +1 −0 Original line number Diff line number Diff line Loading @@ -3,3 +3,4 @@ qcom_tsens-y += tsens.o tsens-common.o tsens-8916.o tsens-8974.o tsens-8960.o obj-$(CONFIG_MSM_BCL_PERIPHERAL_CTL) += bcl_peripheral.o obj-$(CONFIG_QTI_THERMAL_LIMITS_DCVS) += msm_lmh_dcvs.o obj-$(CONFIG_QTI_VIRTUAL_SENSOR) += qti_virtual_sensor.o obj-$(CONFIG_QTI_REG_COOLING_DEVICE) += regulator_cooling.o
drivers/thermal/qcom/regulator_cooling.c 0 → 100644 +224 −0 Original line number Diff line number Diff line /* Copyright (c) 2017, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/module.h> #include <linux/platform_device.h> #include <linux/thermal.h> #include <linux/err.h> #include <linux/slab.h> #include <linux/mailbox_client.h> #define REG_CDEV_DRIVER "reg-cooling-device" #define REG_MSG_FORMAT "{class:volt_flr, event:zero_temp, res:%s, value:%s}" #define REG_CDEV_MAX_STATE 1 #define MBOX_TOUT_MS 1000 #define REG_MSG_MAX_LEN 100 struct reg_cooling_device { struct thermal_cooling_device *cdev; unsigned int min_state; const char *resource_name; struct mbox_chan *qmp_chan; struct mbox_client *client; }; struct aop_msg { uint32_t len; void *msg; }; enum regulator_rail_type { REG_COOLING_CX, REG_COOLING_MX, REG_COOLING_EBI, REG_COOLING_NR, }; static char *regulator_rail[REG_COOLING_NR] = { "cx", "mx", "ebi", }; static int aop_send_msg(struct reg_cooling_device *reg_dev, int min_state) { char msg_buf[REG_MSG_MAX_LEN] = {0}; int ret = 0; struct aop_msg msg; if (!reg_dev->qmp_chan) { pr_err("mbox not initialized for resource:%s\n", reg_dev->resource_name); return -EINVAL; } ret = snprintf(msg_buf, REG_MSG_MAX_LEN, REG_MSG_FORMAT, reg_dev->resource_name, (min_state == REG_CDEV_MAX_STATE) ? "off" : "on"); if (ret >= REG_MSG_MAX_LEN) { pr_err("Message too long for resource:%s\n", reg_dev->resource_name); return -E2BIG; } msg.len = REG_MSG_MAX_LEN; msg.msg = msg_buf; ret = mbox_send_message(reg_dev->qmp_chan, &msg); return (ret < 0) ? ret : 0; } static int reg_get_max_state(struct thermal_cooling_device *cdev, unsigned long *state) { *state = REG_CDEV_MAX_STATE; return 0; } static int reg_get_min_state(struct thermal_cooling_device *cdev, unsigned long *state) { struct reg_cooling_device *reg_dev = cdev->devdata; *state = reg_dev->min_state; return 0; } static int reg_send_min_state(struct thermal_cooling_device *cdev, unsigned long state) { struct reg_cooling_device *reg_dev = cdev->devdata; int ret = 0; if (state > REG_CDEV_MAX_STATE) state = REG_CDEV_MAX_STATE; if (reg_dev->min_state == state) return ret; ret = aop_send_msg(reg_dev, state); if (ret) { pr_err("regulator:%s switching to floor %lu error. err:%d\n", reg_dev->resource_name, state, ret); } else { pr_debug("regulator:%s switched to %lu from %d\n", reg_dev->resource_name, state, reg_dev->min_state); reg_dev->min_state = state; } return ret; } static int reg_get_cur_state(struct thermal_cooling_device *cdev, unsigned long *state) { *state = 0; return 0; } static int reg_send_cur_state(struct thermal_cooling_device *cdev, unsigned long state) { return 0; } static struct thermal_cooling_device_ops reg_dev_ops = { .get_max_state = reg_get_max_state, .get_cur_state = reg_get_cur_state, .set_cur_state = reg_send_cur_state, .set_min_state = reg_send_min_state, .get_min_state = reg_get_min_state, }; static int reg_init_mbox(struct platform_device *pdev, struct reg_cooling_device *reg_dev) { reg_dev->client = devm_kzalloc(&pdev->dev, sizeof(*reg_dev->client), GFP_KERNEL); if (!reg_dev->client) return -ENOMEM; reg_dev->client->dev = &pdev->dev; reg_dev->client->tx_block = true; reg_dev->client->tx_tout = MBOX_TOUT_MS; reg_dev->client->knows_txdone = false; reg_dev->qmp_chan = mbox_request_channel(reg_dev->client, 0); if (IS_ERR(reg_dev->qmp_chan)) { dev_err(&pdev->dev, "Mbox request failed. err:%ld\n", PTR_ERR(reg_dev->qmp_chan)); return PTR_ERR(reg_dev->qmp_chan); } return 0; } static int reg_dev_probe(struct platform_device *pdev) { int ret = 0, idx = 0; struct reg_cooling_device *reg_dev = NULL; reg_dev = devm_kzalloc(&pdev->dev, sizeof(*reg_dev), GFP_KERNEL); if (!reg_dev) return -ENOMEM; ret = reg_init_mbox(pdev, reg_dev); if (ret) return ret; ret = of_property_read_string(pdev->dev.of_node, "qcom,reg-resource-name", ®_dev->resource_name); if (ret) { dev_err(&pdev->dev, "Error reading resource name. err:%d\n", ret); goto mbox_free; } for (idx = 0; idx < REG_COOLING_NR; idx++) { if (!strcmp(reg_dev->resource_name, regulator_rail[idx])) break; } if (idx == REG_COOLING_NR) { dev_err(&pdev->dev, "Invalid regulator resource name:%s\n", reg_dev->resource_name); ret = -EINVAL; goto mbox_free; } reg_dev->min_state = REG_CDEV_MAX_STATE; reg_dev->cdev = thermal_of_cooling_device_register( pdev->dev.of_node, (char *)reg_dev->resource_name, reg_dev, ®_dev_ops); if (IS_ERR(reg_dev->cdev)) goto mbox_free; return ret; mbox_free: mbox_free_channel(reg_dev->qmp_chan); return ret; } static const struct of_device_id reg_dev_of_match[] = { {.compatible = "qcom,rpmh-reg-cdev", }, {} }; static struct platform_driver reg_dev_driver = { .driver = { .name = REG_CDEV_DRIVER, .of_match_table = reg_dev_of_match, }, .probe = reg_dev_probe, }; builtin_platform_driver(reg_dev_driver);
