diff options
Diffstat (limited to 'target/linux/brcm2708/patches-3.10/0033-Added-hwmon-thermal-driver-for-reporting-core-temper.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-3.10/0033-Added-hwmon-thermal-driver-for-reporting-core-temper.patch | 519 |
1 files changed, 519 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-3.10/0033-Added-hwmon-thermal-driver-for-reporting-core-temper.patch b/target/linux/brcm2708/patches-3.10/0033-Added-hwmon-thermal-driver-for-reporting-core-temper.patch new file mode 100644 index 0000000000..82578e0714 --- /dev/null +++ b/target/linux/brcm2708/patches-3.10/0033-Added-hwmon-thermal-driver-for-reporting-core-temper.patch @@ -0,0 +1,519 @@ +From 40934fa5ae748fab27146883be929d4190b35c16 Mon Sep 17 00:00:00 2001 +From: popcornmix <popcornmix@gmail.com> +Date: Tue, 26 Mar 2013 19:24:24 +0000 +Subject: [PATCH 033/174] Added hwmon/thermal driver for reporting core + temperature. Thanks Dorian + +--- + arch/arm/mach-bcm2708/bcm2708.c | 11 ++ + drivers/hwmon/Kconfig | 10 ++ + drivers/hwmon/Makefile | 1 + + drivers/hwmon/bcm2835-hwmon.c | 219 ++++++++++++++++++++++++++++++++++++++ + drivers/thermal/Kconfig | 7 ++ + drivers/thermal/Makefile | 1 + + drivers/thermal/bcm2835-thermal.c | 208 ++++++++++++++++++++++++++++++++++++ + 7 files changed, 457 insertions(+) + create mode 100644 drivers/hwmon/bcm2835-hwmon.c + create mode 100644 drivers/thermal/bcm2835-thermal.c + +--- a/arch/arm/mach-bcm2708/bcm2708.c ++++ b/arch/arm/mach-bcm2708/bcm2708.c +@@ -562,6 +562,14 @@ static struct platform_device bcm2708_bs + .resource = bcm2708_bsc1_resources, + }; + ++static struct platform_device bcm2835_hwmon_device = { ++ .name = "bcm2835_hwmon", ++}; ++ ++static struct platform_device bcm2835_thermal_device = { ++ .name = "bcm2835_thermal", ++}; ++ + int __init bcm_register_device(struct platform_device *pdev) + { + int ret; +@@ -682,6 +690,9 @@ void __init bcm2708_init(void) + bcm_register_device(&bcm2708_bsc0_device); + bcm_register_device(&bcm2708_bsc1_device); + ++ bcm_register_device(&bcm2835_hwmon_device); ++ bcm_register_device(&bcm2835_thermal_device); ++ + for (i = 0; i < ARRAY_SIZE(amba_devs); i++) { + struct amba_device *d = amba_devs[i]; + amba_device_register(d, &iomem_resource); +--- a/drivers/hwmon/Kconfig ++++ b/drivers/hwmon/Kconfig +@@ -1537,6 +1537,16 @@ config SENSORS_MC13783_ADC + help + Support for the A/D converter on MC13783 and MC13892 PMIC. + ++config SENSORS_BCM2835 ++ depends on THERMAL_BCM2835=n ++ tristate "Broadcom BCM2835 HWMON Driver" ++ help ++ If you say yes here you get support for the hardware ++ monitoring features of the BCM2835 Chip ++ ++ This driver can also be built as a module. If so, the module ++ will be called bcm2835-hwmon. ++ + if ACPI + + comment "ACPI drivers" +--- /dev/null ++++ b/drivers/hwmon/bcm2835-hwmon.c +@@ -0,0 +1,219 @@ ++/***************************************************************************** ++* 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/kernel.h> ++#include <linux/module.h> ++#include <linux/init.h> ++#include <linux/hwmon.h> ++#include <linux/hwmon-sysfs.h> ++#include <linux/platform_device.h> ++#include <linux/sysfs.h> ++#include <mach/vcio.h> ++#include <linux/slab.h> ++#include <linux/err.h> ++ ++#define MODULE_NAME "bcm2835_hwmon" ++ ++/*#define HWMON_DEBUG_ENABLE*/ ++ ++#ifdef HWMON_DEBUG_ENABLE ++#define print_debug(fmt,...) printk(KERN_INFO "%s:%s:%d: "fmt"\n", MODULE_NAME, __func__, __LINE__, ##__VA_ARGS__) ++#else ++#define print_debug(fmt,...) ++#endif ++#define print_err(fmt,...) printk(KERN_ERR "%s:%s:%d: "fmt"\n", MODULE_NAME, __func__,__LINE__, ##__VA_ARGS__) ++#define print_info(fmt,...) printk(KERN_INFO "%s: "fmt"\n", MODULE_NAME, ##__VA_ARGS__) ++ ++#define VC_TAG_GET_TEMP 0x00030006 ++#define VC_TAG_GET_MAX_TEMP 0x0003000A ++ ++/* --- STRUCTS --- */ ++struct bcm2835_hwmon_data { ++ struct device *hwmon_dev; ++}; ++ ++/* tag part of the message */ ++struct vc_msg_tag { ++ uint32_t tag_id; /* the tag ID for the temperature */ ++ uint32_t buffer_size; /* size of the buffer (should be 8) */ ++ uint32_t request_code; /* identifies message as a request (should be 0) */ ++ uint32_t id; /* extra ID field (should be 0) */ ++ uint32_t val; /* returned value of the temperature */ ++}; ++ ++/* message structure to be sent to videocore */ ++struct vc_msg { ++ uint32_t msg_size; /* simply, sizeof(struct vc_msg) */ ++ uint32_t request_code; /* holds various information like the success and number of bytes returned (refer to mailboxes wiki) */ ++ struct vc_msg_tag tag; /* the tag structure above to make */ ++ uint32_t end_tag; /* an end identifier, should be set to NULL */ ++}; ++ ++typedef enum { ++ TEMP, ++ MAX_TEMP, ++} temp_type; ++ ++/* --- PROTOTYPES --- */ ++static ssize_t bcm2835_get_temp(struct device *dev, struct device_attribute *attr, char *buf); ++static ssize_t bcm2835_get_name(struct device *dev, struct device_attribute *attr, char *buf); ++ ++/* --- GLOBALS --- */ ++ ++static struct bcm2835_hwmon_data *bcm2835_data; ++static struct platform_driver bcm2835_hwmon_driver; ++ ++static SENSOR_DEVICE_ATTR(name, S_IRUGO,bcm2835_get_name,NULL,0); ++static SENSOR_DEVICE_ATTR(temp1_input,S_IRUGO,bcm2835_get_temp,NULL,TEMP); ++static SENSOR_DEVICE_ATTR(temp1_max,S_IRUGO,bcm2835_get_temp,NULL,MAX_TEMP); ++ ++static struct attribute* bcm2835_attributes[] = { ++ &sensor_dev_attr_name.dev_attr.attr, ++ &sensor_dev_attr_temp1_input.dev_attr.attr, ++ &sensor_dev_attr_temp1_max.dev_attr.attr, ++ NULL, ++}; ++ ++static struct attribute_group bcm2835_attr_group = { ++ .attrs = bcm2835_attributes, ++}; ++ ++/* --- FUNCTIONS --- */ ++ ++static ssize_t bcm2835_get_name(struct device *dev, struct device_attribute *attr, char *buf) ++{ ++ return sprintf(buf,"bcm2835_hwmon\n"); ++} ++ ++static ssize_t bcm2835_get_temp(struct device *dev, struct device_attribute *attr, char *buf) ++{ ++ struct vc_msg msg; ++ int result; ++ uint temp = 0; ++ int index = ((struct sensor_device_attribute*)to_sensor_dev_attr(attr))->index; ++ ++ print_debug("IN"); ++ ++ /* wipe all previous message data */ ++ memset(&msg, 0, sizeof msg); ++ ++ /* determine the message type */ ++ if(index == TEMP) ++ msg.tag.tag_id = VC_TAG_GET_TEMP; ++ else if (index == MAX_TEMP) ++ msg.tag.tag_id = VC_TAG_GET_MAX_TEMP; ++ else ++ { ++ print_debug("Unknown temperature message!"); ++ return -EINVAL; ++ } ++ ++ msg.msg_size = sizeof msg; ++ msg.tag.buffer_size = 8; ++ ++ /* send the message */ ++ result = bcm_mailbox_property(&msg, sizeof msg); ++ ++ /* check if it was all ok and return the rate in milli degrees C */ ++ if (result == 0 && (msg.request_code & 0x80000000)) ++ temp = (uint)msg.tag.val; ++ #ifdef HWMON_DEBUG_ENABLE ++ else ++ print_debug("Failed to get temperature!"); ++ #endif ++ print_debug("Got temperature as %u",temp); ++ print_debug("OUT"); ++ return sprintf(buf, "%u\n", temp); ++} ++ ++ ++static int bcm2835_hwmon_probe(struct platform_device *pdev) ++{ ++ int err; ++ ++ print_debug("IN"); ++ print_debug("HWMON Driver has been probed!"); ++ ++ /* check that the device isn't null!*/ ++ if(pdev == NULL) ++ { ++ print_debug("Platform device is empty!"); ++ return -ENODEV; ++ } ++ ++ /* allocate memory for neccessary data */ ++ bcm2835_data = kzalloc(sizeof(struct bcm2835_hwmon_data),GFP_KERNEL); ++ if(!bcm2835_data) ++ { ++ print_debug("Unable to allocate memory for hwmon data!"); ++ err = -ENOMEM; ++ goto kzalloc_error; ++ } ++ ++ /* create the sysfs files */ ++ if(sysfs_create_group(&pdev->dev.kobj, &bcm2835_attr_group)) ++ { ++ print_debug("Unable to create sysfs files!"); ++ err = -EFAULT; ++ goto sysfs_error; ++ } ++ ++ /* register the hwmon device */ ++ bcm2835_data->hwmon_dev = hwmon_device_register(&pdev->dev); ++ if (IS_ERR(bcm2835_data->hwmon_dev)) ++ { ++ err = PTR_ERR(bcm2835_data->hwmon_dev); ++ goto hwmon_error; ++ } ++ print_debug("OUT"); ++ return 0; ++ ++ /* error goto's */ ++ hwmon_error: ++ sysfs_remove_group(&pdev->dev.kobj, &bcm2835_attr_group); ++ ++ sysfs_error: ++ kfree(bcm2835_data); ++ ++ kzalloc_error: ++ ++ return err; ++ ++} ++ ++static int bcm2835_hwmon_remove(struct platform_device *pdev) ++{ ++ print_debug("IN"); ++ hwmon_device_unregister(bcm2835_data->hwmon_dev); ++ ++ sysfs_remove_group(&pdev->dev.kobj, &bcm2835_attr_group); ++ print_debug("OUT"); ++ return 0; ++} ++ ++/* Hwmon Driver */ ++static struct platform_driver bcm2835_hwmon_driver = { ++ .probe = bcm2835_hwmon_probe, ++ .remove = bcm2835_hwmon_remove, ++ .driver = { ++ .name = "bcm2835_hwmon", ++ .owner = THIS_MODULE, ++ }, ++}; ++ ++MODULE_LICENSE("GPL"); ++MODULE_AUTHOR("Dorian Peake"); ++MODULE_DESCRIPTION("HW Monitor driver for bcm2835 chip"); ++ ++module_platform_driver(bcm2835_hwmon_driver); +--- a/drivers/thermal/Kconfig ++++ b/drivers/thermal/Kconfig +@@ -169,4 +169,11 @@ 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 ++ 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'. ++ + endif ++ +--- a/drivers/thermal/Makefile ++++ b/drivers/thermal/Makefile +@@ -23,4 +23,5 @@ obj-$(CONFIG_DB8500_THERMAL) += db8500_t + obj-$(CONFIG_ARMADA_THERMAL) += armada_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 + +--- /dev/null ++++ b/drivers/thermal/bcm2835-thermal.c +@@ -0,0 +1,208 @@ ++/***************************************************************************** ++* 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/kernel.h> ++#include <linux/module.h> ++#include <linux/init.h> ++#include <linux/platform_device.h> ++#include <linux/slab.h> ++#include <linux/sysfs.h> ++#include <mach/vcio.h> ++#include <linux/thermal.h> ++ ++ ++/* --- DEFINITIONS --- */ ++#define MODULE_NAME "bcm2835_thermal" ++ ++/*#define THERMAL_DEBUG_ENABLE*/ ++ ++#ifdef THERMAL_DEBUG_ENABLE ++#define print_debug(fmt,...) printk(KERN_INFO "%s:%s:%d: "fmt"\n", MODULE_NAME, __func__, __LINE__, ##__VA_ARGS__) ++#else ++#define print_debug(fmt,...) ++#endif ++#define print_err(fmt,...) printk(KERN_ERR "%s:%s:%d: "fmt"\n", MODULE_NAME, __func__,__LINE__, ##__VA_ARGS__) ++#define print_info(fmt,...) printk(KERN_INFO "%s: "fmt"\n", MODULE_NAME, ##__VA_ARGS__) ++ ++#define VC_TAG_GET_TEMP 0x00030006 ++#define VC_TAG_GET_MAX_TEMP 0x0003000A ++ ++typedef enum { ++ TEMP, ++ MAX_TEMP, ++} temp_type; ++ ++/* --- STRUCTS --- */ ++/* tag part of the message */ ++struct vc_msg_tag { ++ uint32_t tag_id; /* the tag ID for the temperature */ ++ uint32_t buffer_size; /* size of the buffer (should be 8) */ ++ uint32_t request_code; /* identifies message as a request (should be 0) */ ++ uint32_t id; /* extra ID field (should be 0) */ ++ uint32_t val; /* returned value of the temperature */ ++}; ++ ++/* message structure to be sent to videocore */ ++struct vc_msg { ++ uint32_t msg_size; /* simply, sizeof(struct vc_msg) */ ++ uint32_t request_code; /* holds various information like the success and number of bytes returned (refer to mailboxes wiki) */ ++ struct vc_msg_tag tag; /* the tag structure above to make */ ++ uint32_t end_tag; /* an end identifier, should be set to NULL */ ++}; ++ ++struct bcm2835_thermal_data { ++ struct thermal_zone_device *thermal_dev; ++ struct vc_msg msg; ++}; ++ ++/* --- PROTOTYPES --- */ ++static int bcm2835_get_temp(struct thermal_zone_device *thermal_dev, unsigned long *); ++static int bcm2835_get_max_temp(struct thermal_zone_device *thermal_dev, int, unsigned long *); ++static int bcm2835_get_trip_type(struct thermal_zone_device *thermal_dev, int trip_num, enum thermal_trip_type *trip_type); ++static int bcm2835_get_mode(struct thermal_zone_device *thermal_dev, enum thermal_device_mode *dev_mode); ++ ++/* --- GLOBALS --- */ ++static struct bcm2835_thermal_data bcm2835_data; ++ ++/* Thermal Device Operations */ ++static struct thermal_zone_device_ops ops; ++ ++/* --- FUNCTIONS --- */ ++static int bcm2835_get_max_temp(struct thermal_zone_device *thermal_dev, int trip_num, unsigned long *temp) ++{ ++ int result; ++ ++ print_debug("IN"); ++ ++ /* wipe all previous message data */ ++ memset(&bcm2835_data.msg, 0, sizeof bcm2835_data.msg); ++ ++ /* prepare message */ ++ bcm2835_data.msg.msg_size = sizeof bcm2835_data.msg; ++ bcm2835_data.msg.tag.buffer_size = 8; ++ bcm2835_data.msg.tag.tag_id = VC_TAG_GET_MAX_TEMP; ++ ++ /* send the message */ ++ result = bcm_mailbox_property(&bcm2835_data.msg, sizeof bcm2835_data.msg); ++ ++ /* check if it was all ok and return the rate in milli degrees C */ ++ if (result == 0 && (bcm2835_data.msg.request_code & 0x80000000)) ++ *temp = (uint)bcm2835_data.msg.tag.val; ++ #ifdef THERMAL_DEBUG_ENABLE ++ else ++ print_debug("Failed to get temperature!"); ++ #endif ++ print_debug("Got temperature as %u",(uint)*temp); ++ print_debug("OUT"); ++ return 0; ++} ++ ++static int bcm2835_get_temp(struct thermal_zone_device *thermal_dev, unsigned long *temp) ++{ ++ int result; ++ ++ print_debug("IN"); ++ ++ /* wipe all previous message data */ ++ memset(&bcm2835_data.msg, 0, sizeof bcm2835_data.msg); ++ ++ /* prepare message */ ++ bcm2835_data.msg.msg_size = sizeof bcm2835_data.msg; ++ bcm2835_data.msg.tag.buffer_size = 8; ++ bcm2835_data.msg.tag.tag_id = VC_TAG_GET_TEMP; ++ ++ /* send the message */ ++ result = bcm_mailbox_property(&bcm2835_data.msg, sizeof bcm2835_data.msg); ++ ++ /* check if it was all ok and return the rate in milli degrees C */ ++ if (result == 0 && (bcm2835_data.msg.request_code & 0x80000000)) ++ *temp = (uint)bcm2835_data.msg.tag.val; ++ #ifdef THERMAL_DEBUG_ENABLE ++ else ++ print_debug("Failed to get temperature!"); ++ #endif ++ print_debug("Got temperature as %u",(uint)*temp); ++ print_debug("OUT"); ++ return 0; ++} ++ ++ ++static int bcm2835_get_trip_type(struct thermal_zone_device * thermal_dev, int trip_num, enum thermal_trip_type *trip_type) ++{ ++ *trip_type = THERMAL_TRIP_HOT; ++ return 0; ++} ++ ++ ++static int bcm2835_get_mode(struct thermal_zone_device *thermal_dev, enum thermal_device_mode *dev_mode) ++{ ++ *dev_mode = THERMAL_DEVICE_ENABLED; ++ return 0; ++} ++ ++ ++static int bcm2835_thermal_probe(struct platform_device *pdev) ++{ ++ print_debug("IN"); ++ print_debug("THERMAL Driver has been probed!"); ++ ++ /* check that the device isn't null!*/ ++ if(pdev == NULL) ++ { ++ print_debug("Platform device is empty!"); ++ return -ENODEV; ++ } ++ ++ if(!(bcm2835_data.thermal_dev = thermal_zone_device_register("bcm2835_thermal", 1, 0, NULL, &ops, NULL, 0, 0))) ++ { ++ print_debug("Unable to register the thermal device!"); ++ return -EFAULT; ++ } ++ return 0; ++} ++ ++ ++static int bcm2835_thermal_remove(struct platform_device *pdev) ++{ ++ print_debug("IN"); ++ ++ thermal_zone_device_unregister(bcm2835_data.thermal_dev); ++ ++ print_debug("OUT"); ++ ++ return 0; ++} ++ ++static struct thermal_zone_device_ops ops = { ++ .get_temp = bcm2835_get_temp, ++ .get_trip_temp = bcm2835_get_max_temp, ++ .get_trip_type = bcm2835_get_trip_type, ++ .get_mode = bcm2835_get_mode, ++}; ++ ++/* Thermal Driver */ ++static struct platform_driver bcm2835_thermal_driver = { ++ .probe = bcm2835_thermal_probe, ++ .remove = bcm2835_thermal_remove, ++ .driver = { ++ .name = "bcm2835_thermal", ++ .owner = THIS_MODULE, ++ }, ++}; ++ ++MODULE_LICENSE("GPL"); ++MODULE_AUTHOR("Dorian Peake"); ++MODULE_DESCRIPTION("Thermal driver for bcm2835 chip"); ++ ++module_platform_driver(bcm2835_thermal_driver); |