diff options
Diffstat (limited to 'target/linux/brcm2708/patches-3.10/013-bcm2835-hwmon-driver.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-3.10/013-bcm2835-hwmon-driver.patch | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-3.10/013-bcm2835-hwmon-driver.patch b/target/linux/brcm2708/patches-3.10/013-bcm2835-hwmon-driver.patch new file mode 100644 index 0000000..4598053 --- /dev/null +++ b/target/linux/brcm2708/patches-3.10/013-bcm2835-hwmon-driver.patch @@ -0,0 +1,257 @@ +Index: linux-3.10/drivers/hwmon/bcm2835-hwmon.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-3.10/drivers/hwmon/bcm2835-hwmon.c 2013-07-09 20:25:51.309324091 +0100 +@@ -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); +Index: linux-3.10/drivers/hwmon/Kconfig +=================================================================== +--- linux-3.10.orig/drivers/hwmon/Kconfig 2013-07-09 20:25:51.321324159 +0100 ++++ linux-3.10/drivers/hwmon/Kconfig 2013-07-09 20:25:51.313324108 +0100 +@@ -1537,6 +1537,16 @@ + 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" +Index: linux-3.10/drivers/hwmon/Makefile +=================================================================== +--- linux-3.10.orig/drivers/hwmon/Makefile 2013-07-09 20:25:51.321324159 +0100 ++++ linux-3.10/drivers/hwmon/Makefile 2013-07-09 20:26:07.361403698 +0100 +@@ -141,6 +141,7 @@ + obj-$(CONFIG_SENSORS_WM831X) += wm831x-hwmon.o + obj-$(CONFIG_SENSORS_WM8350) += wm8350-hwmon.o + obj-$(CONFIG_SENSORS_GSC) += gsc.o ++obj-$(CONFIG_SENSORS_BCM2835) += bcm2835-hwmon.o + + obj-$(CONFIG_PMBUS) += pmbus/ + |