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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.patch257
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/
+