diff options
author | Bai Ping <ping.bai@nxp.com> | 2017-06-06 13:53:24 +0800 |
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committer | Jason Liu <jason.hui.liu@nxp.com> | 2019-02-12 10:26:44 +0800 |
commit | a953da11eefb4adde2dfd47384eb8026e9ed034b (patch) | |
tree | 063108effc3e1fc18f4adb7c689ad91c8e65d16d /drivers/thermal | |
parent | 4ff81e24a745ead62878031d4c7df0ed91cde51f (diff) |
MLK-14972-02 driver: thermal: Add i.MX8QM/QXP thermal support
Add i.MX8QM/QXP thermal driver support.
Signed-off-by: Bai Ping <ping.bai@nxp.com>
Diffstat (limited to 'drivers/thermal')
-rw-r--r-- | drivers/thermal/Kconfig | 9 | ||||
-rw-r--r-- | drivers/thermal/Makefile | 1 | ||||
-rw-r--r-- | drivers/thermal/imx_sc_thermal.c | 169 |
3 files changed, 179 insertions, 0 deletions
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 4999e518ce86..0a7c9de7e1f2 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -214,6 +214,15 @@ config IMX_THERMAL cpufreq is used as the cooling device to throttle CPUs when the passive trip is crossed. +config IMX_SC_THERMAL + tristate "thermal sensor driver for NXP i.MX8 SoCs" + depends on THERMAL_OF && ARCH_MXC_ARM64 + help + Support for Temperature Monitor (TEMPMON) found on NXP i.MX SOCs + with system controller. + cpufreq is used as the cooling device to throttle CPUs when the + passive trip is crossed. + config MAX77620_THERMAL tristate "Temperature sensor driver for Maxim MAX77620 PMIC" depends on MFD_MAX77620 diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index 90b814d3b3dd..f5fa3da8ed75 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -41,6 +41,7 @@ obj-$(CONFIG_DB8500_THERMAL) += db8500_thermal.o obj-$(CONFIG_ARMADA_THERMAL) += armada_thermal.o obj-$(CONFIG_TANGO_THERMAL) += tango_thermal.o obj-$(CONFIG_IMX_THERMAL) += imx_thermal.o +obj-$(CONFIG_IMX_SC_THERMAL) += imx_sc_thermal.o obj-$(CONFIG_MAX77620_THERMAL) += max77620_thermal.o obj-$(CONFIG_QORIQ_THERMAL) += qoriq_thermal.o obj-$(CONFIG_DEVICE_THERMAL) += device_cooling.o diff --git a/drivers/thermal/imx_sc_thermal.c b/drivers/thermal/imx_sc_thermal.c new file mode 100644 index 000000000000..90c5c2500885 --- /dev/null +++ b/drivers/thermal/imx_sc_thermal.c @@ -0,0 +1,169 @@ +/* + * Copyright 2017 NXP. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/err.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/pm.h> +#include <linux/slab.h> +#include <linux/thermal.h> +#include <soc/imx8/sc/sci.h> + +struct imx_sc_sensor { + struct thermal_zone_device *tzd; + sc_rsrc_t hw_id; +}; + +struct imx_sc_tsens_device { + u32 sensor_num; + struct imx_sc_sensor sensor[0]; +}; + +/* The driver support 1 passive trip point and 1 critical trip point */ +enum imx_thermal_trip { + IMX_TRIP_PASSIVE, + IMX_TRIP_CRITICAL, + IMX_TRIP_NUM, +}; + +static const sc_rsrc_t imx8qm_sensor_hw_id[] = { + SC_R_A53, SC_R_A72, SC_R_GPU_0_PID0, SC_R_GPU_1_PID0, + SC_R_DRC_0, SC_R_DRC_1, SC_R_VPU_PID0, SC_R_PMIC_0, + SC_R_PMIC_1, SC_R_PMIC_2, +}; + +static const sc_rsrc_t imx8qxp_sensor_hw_id[] = { + SC_R_DRC_0, +}; + +const int *sensor_hw_id; +sc_ipc_t tsens_ipcHandle; + +static int imx_sc_tsens_get_temp(void *data, int *temp) +{ + struct imx_sc_sensor *sensor = data; + sc_err_t sciErr; + int16_t celsius; + int8_t tenths; + + sciErr = sc_misc_get_temp(tsens_ipcHandle, sensor->hw_id, + SC_C_TEMP, &celsius, &tenths); + /* + * if the SS power domain is down, read temp will fail, so + * we can return the temp of A53 CPU domain instead. + */ + if (sciErr != SC_ERR_NONE) { + sciErr = sc_misc_get_temp(tsens_ipcHandle, sensor_hw_id[0], + SC_C_TEMP, &celsius, &tenths); + if (sciErr != SC_ERR_NONE) { + pr_err("read temp sensor:%d failed\n", sensor->hw_id); + return -EINVAL; + } + } + *temp = celsius * 1000 + tenths; + + return 0; +} + +static int imx_sc_tsens_get_trend(void *p, int trip, enum thermal_trend *trend) +{ + return 0; +} + + +static const struct thermal_zone_of_device_ops imx_sc_tsens_ops = { + .get_temp = imx_sc_tsens_get_temp, + .get_trend = imx_sc_tsens_get_trend, +}; + +static const struct of_device_id imx_sc_tsens_table[] = { + { .compatible = "nxp,imx8qm-sc-tsens", .data = &imx8qm_sensor_hw_id, }, + { .compatible = "nxp,imx8qxp-sc-tsens", .data = &imx8qxp_sensor_hw_id, }, + {}, +}; + +MODULE_DEVICE_TABLE(of, imx_sc_tsens_table); + +static int imx_sc_tsens_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct imx_sc_tsens_device *tsens_dev; + struct imx_sc_sensor *sensor; + struct thermal_zone_device *tzd; + sc_err_t sciErr; + uint32_t mu_id; + u32 tsens_num; + int ret, sensor_id; + + sciErr = sc_ipc_getMuID(&mu_id); + if (sciErr != SC_ERR_NONE) { + dev_err(&pdev->dev, "Can not get the mu id: %d\n", sciErr); + return -ENODEV; + }; + + sciErr = sc_ipc_open(&tsens_ipcHandle, mu_id); + if (sciErr != SC_ERR_NONE) { + dev_err(&pdev->dev, "open mu channel failed: %d\n", sciErr); + return -EINVAL; + }; + sensor_hw_id = of_device_get_match_data(&pdev->dev); + + /* get the temp sensor number from device node */ + of_property_read_u32(np, "tsens-num", &tsens_num); + if (!tsens_num) { + dev_err(&pdev->dev, "no temp sensor number provided!\n"); + return -EINVAL; + } + + tsens_dev = devm_kzalloc(&pdev->dev, sizeof(*tsens_dev) + + tsens_num * sizeof(*sensor), GFP_KERNEL); + if (!tsens_dev) + return -ENOMEM; + + tsens_dev->sensor_num = tsens_num; + + for (sensor_id = 0; sensor_id < tsens_num; sensor_id++) { + sensor = &tsens_dev->sensor[sensor_id]; + sensor->hw_id = sensor_hw_id[sensor_id]; + tzd = devm_thermal_zone_of_sensor_register(&pdev->dev, sensor_id, sensor, + &imx_sc_tsens_ops); + if (IS_ERR(tzd)) { + dev_err(&pdev->dev, "failed to register temp sensor: %d\n", sensor_id); + ret = -EINVAL; + goto failed; + } + sensor->tzd = tzd; + } + + return 0; +failed: + return ret; +} + +static int imx_sc_tsens_remove(struct platform_device *pdev) +{ + return 0; +} + +static struct platform_driver imx_sc_tsens_driver = { + .probe = imx_sc_tsens_probe, + .remove = imx_sc_tsens_remove, + .driver = { + .name = "i.MX-sc-tsens", + .of_match_table = imx_sc_tsens_table, + }, +}; + +module_platform_driver(imx_sc_tsens_driver); + +MODULE_AUTHOR("Jacky Bai<ping.bai@nxp.com"); +MODULE_DESCRIPTION("Thermal driver for NXP i.MX SoCs with system controller"); +MODULE_LICENSE("GPL v2"); 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