diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0044-Added-hwmon-thermal-driver-for-reporting-core-temper.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0044-Added-hwmon-thermal-driver-for-reporting-core-temper.patch | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0044-Added-hwmon-thermal-driver-for-reporting-core-temper.patch b/target/linux/brcm2708/patches-4.4/0044-Added-hwmon-thermal-driver-for-reporting-core-temper.patch new file mode 100644 index 0000000000..0834763e24 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0044-Added-hwmon-thermal-driver-for-reporting-core-temper.patch @@ -0,0 +1,193 @@ +From 9f251fdbaaf3bd895c2901413748679d68a0c644 Mon Sep 17 00:00:00 2001 +From: popcornmix <popcornmix@gmail.com> +Date: Tue, 26 Mar 2013 19:24:24 +0000 +Subject: [PATCH 044/232] Added hwmon/thermal driver for reporting core + temperature. Thanks Dorian +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +BCM270x: Move thermal sensor to Device Tree + +Add Device Tree support to bcm2835-thermal driver. +Add thermal sensor device to Device Tree. +Don't add platform device when booting in DT mode. + +Signed-off-by: Noralf Trønnes <noralf@tronnes.org> +--- + drivers/thermal/Kconfig | 7 ++ + drivers/thermal/Makefile | 1 + + drivers/thermal/bcm2835-thermal.c | 141 ++++++++++++++++++++++++++++++++++++++ + 3 files changed, 149 insertions(+) + create mode 100644 drivers/thermal/bcm2835-thermal.c + +--- a/drivers/thermal/Kconfig ++++ b/drivers/thermal/Kconfig +@@ -285,6 +285,13 @@ config INTEL_POWERCLAMP + enforce idle time which results in more package C-state residency. The + user interface is exposed via generic thermal framework. + ++config THERMAL_BCM2835 ++ depends on RASPBERRYPI_FIRMWARE ++ tristate "BCM2835 Thermal Driver" ++ help ++ This will enable temperature monitoring for the Broadcom BCM2835 ++ chip. If built as a module, it will be called 'bcm2835-thermal'. ++ + config X86_PKG_TEMP_THERMAL + tristate "X86 package temperature thermal driver" + depends on X86_THERMAL_VECTOR +--- a/drivers/thermal/Makefile ++++ b/drivers/thermal/Makefile +@@ -38,6 +38,7 @@ obj-$(CONFIG_ARMADA_THERMAL) += armada_t + obj-$(CONFIG_IMX_THERMAL) += imx_thermal.o + obj-$(CONFIG_DB8500_CPUFREQ_COOLING) += db8500_cpufreq_cooling.o + obj-$(CONFIG_INTEL_POWERCLAMP) += intel_powerclamp.o ++obj-$(CONFIG_THERMAL_BCM2835) += bcm2835-thermal.o + obj-$(CONFIG_X86_PKG_TEMP_THERMAL) += x86_pkg_temp_thermal.o + obj-$(CONFIG_INTEL_SOC_DTS_IOSF_CORE) += intel_soc_dts_iosf.o + obj-$(CONFIG_INTEL_SOC_DTS_THERMAL) += intel_soc_dts_thermal.o +--- /dev/null ++++ b/drivers/thermal/bcm2835-thermal.c +@@ -0,0 +1,141 @@ ++/***************************************************************************** ++* Copyright 2011 Broadcom Corporation. All rights reserved. ++* ++* Unless you and Broadcom execute a separate written software license ++* agreement governing use of this software, this software is licensed to you ++* under the terms of the GNU General Public License version 2, available at ++* http://www.broadcom.com/licenses/GPLv2.php (the "GPL"). ++* ++* Notwithstanding the above, under no circumstances may you combine this ++* software in any way with any other Broadcom software provided under a ++* license other than the GPL, without Broadcom's express prior written ++* consent. ++*****************************************************************************/ ++ ++#include <linux/module.h> ++#include <linux/platform_device.h> ++#include <linux/thermal.h> ++#include <soc/bcm2835/raspberrypi-firmware.h> ++ ++static int bcm2835_thermal_get_property(struct thermal_zone_device *tz, ++ int *temp, u32 tag) ++{ ++ struct rpi_firmware *fw = tz->devdata; ++ struct { ++ u32 id; ++ u32 val; ++ } packet; ++ int ret; ++ ++ *temp = 0; ++ packet.id = 0; ++ ret = rpi_firmware_property(fw, tag, &packet, sizeof(packet)); ++ if (ret) { ++ dev_err(&tz->device, "Failed to get temperature\n"); ++ return ret; ++ } ++ ++ *temp = packet.val; ++ dev_dbg(&tz->device, "%stemp=%d\n", ++ tag == RPI_FIRMWARE_GET_MAX_TEMPERATURE ? "max" : "", *temp); ++ ++ return 0; ++} ++ ++static int bcm2835_thermal_get_temp(struct thermal_zone_device *tz, ++ int *temp) ++{ ++ return bcm2835_thermal_get_property(tz, temp, ++ RPI_FIRMWARE_GET_TEMPERATURE); ++} ++ ++static int bcm2835_thermal_get_max_temp(struct thermal_zone_device *tz, ++ int trip, int *temp) ++{ ++ /* ++ * The maximum safe temperature of the SoC. ++ * Overclock may be disabled above this temperature. ++ */ ++ return bcm2835_thermal_get_property(tz, temp, ++ RPI_FIRMWARE_GET_MAX_TEMPERATURE); ++} ++ ++static int bcm2835_thermal_get_trip_type(struct thermal_zone_device *tz, ++ int trip, enum thermal_trip_type *type) ++{ ++ *type = THERMAL_TRIP_HOT; ++ ++ return 0; ++} ++ ++static int bcm2835_thermal_get_mode(struct thermal_zone_device *tz, ++ enum thermal_device_mode *mode) ++{ ++ *mode = THERMAL_DEVICE_ENABLED; ++ ++ return 0; ++} ++ ++static struct thermal_zone_device_ops ops = { ++ .get_temp = bcm2835_thermal_get_temp, ++ .get_trip_temp = bcm2835_thermal_get_max_temp, ++ .get_trip_type = bcm2835_thermal_get_trip_type, ++ .get_mode = bcm2835_thermal_get_mode, ++}; ++ ++static int bcm2835_thermal_probe(struct platform_device *pdev) ++{ ++ struct device_node *fw_np; ++ struct rpi_firmware *fw; ++ struct thermal_zone_device *tz; ++ ++ fw_np = of_parse_phandle(pdev->dev.of_node, "firmware", 0); ++/* Remove comment when booting without Device Tree is no longer supported ++ if (!fw_np) { ++ dev_err(&pdev->dev, "Missing firmware node\n"); ++ return -ENOENT; ++ } ++*/ ++ fw = rpi_firmware_get(fw_np); ++ if (!fw) ++ return -EPROBE_DEFER; ++ ++ tz = thermal_zone_device_register("bcm2835_thermal", 1, 0, fw, &ops, ++ NULL, 0, 0); ++ if (IS_ERR(tz)) { ++ dev_err(&pdev->dev, "Failed to register the thermal device\n"); ++ return PTR_ERR(tz); ++ } ++ ++ platform_set_drvdata(pdev, tz); ++ ++ return 0; ++} ++ ++static int bcm2835_thermal_remove(struct platform_device *pdev) ++{ ++ thermal_zone_device_unregister(platform_get_drvdata(pdev)); ++ ++ return 0; ++} ++ ++static const struct of_device_id bcm2835_thermal_of_match_table[] = { ++ { .compatible = "brcm,bcm2835-thermal", }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, bcm2835_thermal_of_match_table); ++ ++static struct platform_driver bcm2835_thermal_driver = { ++ .probe = bcm2835_thermal_probe, ++ .remove = bcm2835_thermal_remove, ++ .driver = { ++ .name = "bcm2835_thermal", ++ .of_match_table = bcm2835_thermal_of_match_table, ++ }, ++}; ++module_platform_driver(bcm2835_thermal_driver); ++ ++MODULE_AUTHOR("Dorian Peake"); ++MODULE_AUTHOR("Noralf Trønnes"); ++MODULE_DESCRIPTION("Thermal driver for bcm2835 chip"); ++MODULE_LICENSE("GPL"); |