From 4d1dc40185735e285576d7ed865b065c5cabe40c Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Wed, 30 Aug 2017 12:05:26 +0200 Subject: dt-bindings: clock: tegra: Add sor1_out clock The sor1_src clock implemented on Tegra210 is modelled the wrong way around, which causes some issues with HDMI and DP support. This clock implementation is provided by BPMP on Tegra186, which models this in a more correct way. Since this introduces incompatibilities between the two SoC generations which we want to avoid, the Tegra210 will be fixed in subsequent patches. This change adds sor1_out as an alias for sor1_src. Signed-off-by: Thierry Reding --- include/dt-bindings/clock/tegra210-car.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/dt-bindings/clock/tegra210-car.h b/include/dt-bindings/clock/tegra210-car.h index 46689cd3750b..43c4a8407333 100644 --- a/include/dt-bindings/clock/tegra210-car.h +++ b/include/dt-bindings/clock/tegra210-car.h @@ -309,6 +309,7 @@ #define TEGRA210_CLK_BLINK 280 /* 281 */ #define TEGRA210_CLK_SOR1_SRC 282 +#define TEGRA210_CLK_SOR1_OUT 282 /* 283 */ #define TEGRA210_CLK_XUSB_HOST_SRC 284 #define TEGRA210_CLK_XUSB_FALCON_SRC 285 -- cgit v1.2.3 From 3e09b155d58e44e33a699650128f8c6c833cb320 Mon Sep 17 00:00:00 2001 From: Mikko Perttunen Date: Mon, 24 Jul 2017 19:29:15 +0300 Subject: dt-bindings: Add bindings for nvidia,tegra186-bpmp-thermal In Tegra186, the BPMP (Boot and Power Management Processor) implements an interface that is used to read system temperatures, including CPU cluster and GPU temperatures. This binding describes the thermal sensor that is exposed by BPMP. Signed-off-by: Mikko Perttunen Acked-by: Rob Herring Signed-off-by: Thierry Reding --- .../thermal/nvidia,tegra186-bpmp-thermal.txt | 32 ++++++++++++++++++++++ .../dt-bindings/thermal/tegra186-bpmp-thermal.h | 14 ++++++++++ 2 files changed, 46 insertions(+) create mode 100644 Documentation/devicetree/bindings/thermal/nvidia,tegra186-bpmp-thermal.txt create mode 100644 include/dt-bindings/thermal/tegra186-bpmp-thermal.h diff --git a/Documentation/devicetree/bindings/thermal/nvidia,tegra186-bpmp-thermal.txt b/Documentation/devicetree/bindings/thermal/nvidia,tegra186-bpmp-thermal.txt new file mode 100644 index 000000000000..276387dd6815 --- /dev/null +++ b/Documentation/devicetree/bindings/thermal/nvidia,tegra186-bpmp-thermal.txt @@ -0,0 +1,32 @@ +NVIDIA Tegra186 BPMP thermal sensor + +In Tegra186, the BPMP (Boot and Power Management Processor) implements an +interface that is used to read system temperatures, including CPU cluster +and GPU temperatures. This binding describes the thermal sensor that is +exposed by BPMP. + +The BPMP thermal node must be located directly inside the main BPMP node. See +../firmware/nvidia,tegra186-bpmp.txt for details of the BPMP binding. + +This node represents a thermal sensor. See thermal.txt for details of the +core thermal binding. + +Required properties: +- compatible: + Array of strings. + One of: + - "nvidia,tegra186-bpmp-thermal". +- #thermal-sensor-cells: Cell for sensor index. + Single-cell integer. + Must be <1>. + +Example: + +bpmp { + ... + + bpmp_thermal: thermal { + compatible = "nvidia,tegra186-bpmp-thermal"; + #thermal-sensor-cells = <1>; + }; +}; diff --git a/include/dt-bindings/thermal/tegra186-bpmp-thermal.h b/include/dt-bindings/thermal/tegra186-bpmp-thermal.h new file mode 100644 index 000000000000..a96b8fa31aab --- /dev/null +++ b/include/dt-bindings/thermal/tegra186-bpmp-thermal.h @@ -0,0 +1,14 @@ +/* + * This header provides constants for binding nvidia,tegra186-bpmp-thermal. + */ + +#ifndef _DT_BINDINGS_THERMAL_TEGRA186_BPMP_THERMAL_H +#define _DT_BINDINGS_THERMAL_TEGRA186_BPMP_THERMAL_H + +#define TEGRA186_BPMP_THERMAL_ZONE_CPU 2 +#define TEGRA186_BPMP_THERMAL_ZONE_GPU 3 +#define TEGRA186_BPMP_THERMAL_ZONE_AUX 4 +#define TEGRA186_BPMP_THERMAL_ZONE_PLLX 5 +#define TEGRA186_BPMP_THERMAL_ZONE_AO 6 + +#endif -- cgit v1.2.3 From 7afebede62bed77ebae34fc64406984949d2a127 Mon Sep 17 00:00:00 2001 From: Mikko Perttunen Date: Mon, 24 Jul 2017 19:29:18 +0300 Subject: thermal: Add Tegra BPMP thermal sensor driver On Tegra186, the BPMP (Boot and Power Management Processor) exposes an interface to thermal sensors on the system-on-chip. This driver implements access to the interface. It supports reading the temperature, setting trip points and receiving notification of a tripped trip point. Signed-off-by: Mikko Perttunen Acked-by: Zhang Rui Signed-off-by: Thierry Reding --- drivers/thermal/Makefile | 2 +- drivers/thermal/tegra/Kconfig | 7 + drivers/thermal/tegra/Makefile | 3 +- drivers/thermal/tegra/tegra-bpmp-thermal.c | 263 +++++++++++++++++++++++++++++ 4 files changed, 273 insertions(+), 2 deletions(-) create mode 100644 drivers/thermal/tegra/tegra-bpmp-thermal.c diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index 8b79bca23536..3a05204e0727 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -54,7 +54,7 @@ obj-$(CONFIG_INTEL_BXT_PMIC_THERMAL) += intel_bxt_pmic_thermal.o obj-$(CONFIG_INTEL_PCH_THERMAL) += intel_pch_thermal.o obj-$(CONFIG_ST_THERMAL) += st/ obj-$(CONFIG_QCOM_TSENS) += qcom/ -obj-$(CONFIG_TEGRA_SOCTHERM) += tegra/ +obj-y += tegra/ obj-$(CONFIG_HISI_THERMAL) += hisi_thermal.o obj-$(CONFIG_MTK_THERMAL) += mtk_thermal.o obj-$(CONFIG_GENERIC_ADC_THERMAL) += thermal-generic-adc.o diff --git a/drivers/thermal/tegra/Kconfig b/drivers/thermal/tegra/Kconfig index cec586ec7e4b..f8740f7852e3 100644 --- a/drivers/thermal/tegra/Kconfig +++ b/drivers/thermal/tegra/Kconfig @@ -10,4 +10,11 @@ config TEGRA_SOCTHERM zones to manage temperatures. This option is also required for the emergency thermal reset (thermtrip) feature to function. +config TEGRA_BPMP_THERMAL + tristate "Tegra BPMP thermal sensing" + depends on TEGRA_BPMP || COMPILE_TEST + help + Enable this option for support for sensing system temperature of NVIDIA + Tegra systems-on-chip with the BPMP coprocessor (Tegra186). + endmenu diff --git a/drivers/thermal/tegra/Makefile b/drivers/thermal/tegra/Makefile index 1ce1af2cf0f5..ea541ecbbf32 100644 --- a/drivers/thermal/tegra/Makefile +++ b/drivers/thermal/tegra/Makefile @@ -1,4 +1,5 @@ -obj-$(CONFIG_TEGRA_SOCTHERM) += tegra-soctherm.o +obj-$(CONFIG_TEGRA_SOCTHERM) += tegra-soctherm.o +obj-$(CONFIG_TEGRA_BPMP_THERMAL) += tegra-bpmp-thermal.o tegra-soctherm-y := soctherm.o soctherm-fuse.o tegra-soctherm-$(CONFIG_ARCH_TEGRA_124_SOC) += tegra124-soctherm.o diff --git a/drivers/thermal/tegra/tegra-bpmp-thermal.c b/drivers/thermal/tegra/tegra-bpmp-thermal.c new file mode 100644 index 000000000000..b0980dbca3b3 --- /dev/null +++ b/drivers/thermal/tegra/tegra-bpmp-thermal.c @@ -0,0 +1,263 @@ +/* + * Copyright (c) 2015-2017, NVIDIA CORPORATION. All rights reserved. + * + * Author: + * Mikko Perttunen + * Aapo Vienamo + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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 +#include +#include +#include +#include + +#include +#include + +struct tegra_bpmp_thermal_zone { + struct tegra_bpmp_thermal *tegra; + struct thermal_zone_device *tzd; + struct work_struct tz_device_update_work; + unsigned int idx; +}; + +struct tegra_bpmp_thermal { + struct device *dev; + struct tegra_bpmp *bpmp; + unsigned int num_zones; + struct tegra_bpmp_thermal_zone **zones; +}; + +static int tegra_bpmp_thermal_get_temp(void *data, int *out_temp) +{ + struct tegra_bpmp_thermal_zone *zone = data; + struct mrq_thermal_host_to_bpmp_request req; + union mrq_thermal_bpmp_to_host_response reply; + struct tegra_bpmp_message msg; + int err; + + memset(&req, 0, sizeof(req)); + req.type = CMD_THERMAL_GET_TEMP; + req.get_temp.zone = zone->idx; + + memset(&msg, 0, sizeof(msg)); + msg.mrq = MRQ_THERMAL; + msg.tx.data = &req; + msg.tx.size = sizeof(req); + msg.rx.data = &reply; + msg.rx.size = sizeof(reply); + + err = tegra_bpmp_transfer(zone->tegra->bpmp, &msg); + if (err) + return err; + + *out_temp = reply.get_temp.temp; + + return 0; +} + +static int tegra_bpmp_thermal_set_trips(void *data, int low, int high) +{ + struct tegra_bpmp_thermal_zone *zone = data; + struct mrq_thermal_host_to_bpmp_request req; + struct tegra_bpmp_message msg; + + memset(&req, 0, sizeof(req)); + req.type = CMD_THERMAL_SET_TRIP; + req.set_trip.zone = zone->idx; + req.set_trip.enabled = true; + req.set_trip.low = low; + req.set_trip.high = high; + + memset(&msg, 0, sizeof(msg)); + msg.mrq = MRQ_THERMAL; + msg.tx.data = &req; + msg.tx.size = sizeof(req); + + return tegra_bpmp_transfer(zone->tegra->bpmp, &msg); +} + +static void tz_device_update_work_fn(struct work_struct *work) +{ + struct tegra_bpmp_thermal_zone *zone; + + zone = container_of(work, struct tegra_bpmp_thermal_zone, + tz_device_update_work); + + thermal_zone_device_update(zone->tzd, THERMAL_TRIP_VIOLATED); +} + +static void bpmp_mrq_thermal(unsigned int mrq, struct tegra_bpmp_channel *ch, + void *data) +{ + struct mrq_thermal_bpmp_to_host_request *req; + struct tegra_bpmp_thermal *tegra = data; + int i; + + req = (struct mrq_thermal_bpmp_to_host_request *)ch->ib->data; + + if (req->type != CMD_THERMAL_HOST_TRIP_REACHED) { + dev_err(tegra->dev, "%s: invalid request type: %d\n", + __func__, req->type); + tegra_bpmp_mrq_return(ch, -EINVAL, NULL, 0); + return; + } + + for (i = 0; i < tegra->num_zones; ++i) { + if (tegra->zones[i]->idx != req->host_trip_reached.zone) + continue; + + schedule_work(&tegra->zones[i]->tz_device_update_work); + tegra_bpmp_mrq_return(ch, 0, NULL, 0); + return; + } + + dev_err(tegra->dev, "%s: invalid thermal zone: %d\n", __func__, + req->host_trip_reached.zone); + tegra_bpmp_mrq_return(ch, -EINVAL, NULL, 0); +} + +static int tegra_bpmp_thermal_get_num_zones(struct tegra_bpmp *bpmp, + int *num_zones) +{ + struct mrq_thermal_host_to_bpmp_request req; + union mrq_thermal_bpmp_to_host_response reply; + struct tegra_bpmp_message msg; + int err; + + memset(&req, 0, sizeof(req)); + req.type = CMD_THERMAL_GET_NUM_ZONES; + + memset(&msg, 0, sizeof(msg)); + msg.mrq = MRQ_THERMAL; + msg.tx.data = &req; + msg.tx.size = sizeof(req); + msg.rx.data = &reply; + msg.rx.size = sizeof(reply); + + err = tegra_bpmp_transfer(bpmp, &msg); + if (err) + return err; + + *num_zones = reply.get_num_zones.num; + + return 0; +} + +static const struct thermal_zone_of_device_ops tegra_bpmp_of_thermal_ops = { + .get_temp = tegra_bpmp_thermal_get_temp, + .set_trips = tegra_bpmp_thermal_set_trips, +}; + +static int tegra_bpmp_thermal_probe(struct platform_device *pdev) +{ + struct tegra_bpmp *bpmp = dev_get_drvdata(pdev->dev.parent); + struct tegra_bpmp_thermal *tegra; + struct thermal_zone_device *tzd; + unsigned int i, max_num_zones; + int err; + + tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL); + if (!tegra) + return -ENOMEM; + + tegra->dev = &pdev->dev; + tegra->bpmp = bpmp; + + err = tegra_bpmp_thermal_get_num_zones(bpmp, &max_num_zones); + if (err) { + dev_err(&pdev->dev, "failed to get the number of zones: %d\n", + err); + return err; + } + + tegra->zones = devm_kcalloc(&pdev->dev, max_num_zones, + sizeof(*tegra->zones), GFP_KERNEL); + if (!tegra->zones) + return -ENOMEM; + + for (i = 0; i < max_num_zones; ++i) { + struct tegra_bpmp_thermal_zone *zone; + int temp; + + zone = devm_kzalloc(&pdev->dev, sizeof(*zone), GFP_KERNEL); + if (!zone) + return -ENOMEM; + + zone->idx = i; + zone->tegra = tegra; + + err = tegra_bpmp_thermal_get_temp(zone, &temp); + if (err < 0) { + devm_kfree(&pdev->dev, zone); + continue; + } + + tzd = devm_thermal_zone_of_sensor_register( + &pdev->dev, i, zone, &tegra_bpmp_of_thermal_ops); + if (IS_ERR(tzd)) { + if (PTR_ERR(tzd) == -EPROBE_DEFER) + return -EPROBE_DEFER; + devm_kfree(&pdev->dev, zone); + continue; + } + + zone->tzd = tzd; + INIT_WORK(&zone->tz_device_update_work, + tz_device_update_work_fn); + + tegra->zones[tegra->num_zones++] = zone; + } + + err = tegra_bpmp_request_mrq(bpmp, MRQ_THERMAL, bpmp_mrq_thermal, + tegra); + if (err) { + dev_err(&pdev->dev, "failed to register mrq handler: %d\n", + err); + return err; + } + + platform_set_drvdata(pdev, tegra); + + return 0; +} + +static int tegra_bpmp_thermal_remove(struct platform_device *pdev) +{ + struct tegra_bpmp_thermal *tegra = platform_get_drvdata(pdev); + + tegra_bpmp_free_mrq(tegra->bpmp, MRQ_THERMAL, tegra); + + return 0; +} + +static const struct of_device_id tegra_bpmp_thermal_of_match[] = { + { .compatible = "nvidia,tegra186-bpmp-thermal" }, + { }, +}; +MODULE_DEVICE_TABLE(of, tegra_bpmp_thermal_of_match); + +static struct platform_driver tegra_bpmp_thermal_driver = { + .probe = tegra_bpmp_thermal_probe, + .remove = tegra_bpmp_thermal_remove, + .driver = { + .name = "tegra-bpmp-thermal", + .of_match_table = tegra_bpmp_thermal_of_match, + }, +}; +module_platform_driver(tegra_bpmp_thermal_driver); + +MODULE_AUTHOR("Mikko Perttunen "); +MODULE_DESCRIPTION("NVIDIA Tegra BPMP thermal sensor driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3