summaryrefslogtreecommitdiff
path: root/target/linux/brcm2708/patches-3.10/010-bcm2835-thermal-driver.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/brcm2708/patches-3.10/010-bcm2835-thermal-driver.patch')
-rw-r--r--target/linux/brcm2708/patches-3.10/010-bcm2835-thermal-driver.patch212
1 files changed, 212 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-3.10/010-bcm2835-thermal-driver.patch b/target/linux/brcm2708/patches-3.10/010-bcm2835-thermal-driver.patch
new file mode 100644
index 0000000000..80256d05d7
--- /dev/null
+++ b/target/linux/brcm2708/patches-3.10/010-bcm2835-thermal-driver.patch
@@ -0,0 +1,212 @@
+diff -urN linux-3.10/drivers/thermal/bcm2835-thermal.c linux-rpi-3.10.y/drivers/thermal/bcm2835-thermal.c
+--- linux-3.10/drivers/thermal/bcm2835-thermal.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-rpi-3.10.y/drivers/thermal/bcm2835-thermal.c 2013-07-06 15:25:50.000000000 +0100
+@@ -0,0 +1,184 @@
++/*****************************************************************************
++* 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 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;
++};
++
++/* --- GLOBALS --- */
++static struct bcm2835_thermal_data bcm2835_data;
++
++/* Thermal Device Operations */
++static struct thermal_zone_device_ops ops;
++
++/* --- FUNCTIONS --- */
++
++static int bcm2835_get_temp_or_max(struct thermal_zone_device *thermal_dev, unsigned long *temp, unsigned tag_id)
++{
++ int result = -1, retry = 3;
++ print_debug("IN");
++
++ *temp = 0;
++ while (result != 0 && retry-- > 0) {
++ /* 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 = tag_id;
++
++ /* send the message */
++ result = bcm_mailbox_property(&bcm2835_data.msg, sizeof bcm2835_data.msg);
++ print_debug("Got %stemperature as %u (%d,%x)\n", tag_id==VC_TAG_GET_MAX_TEMP ? "max ":"", (uint)bcm2835_data.msg.tag.val, result, bcm2835_data.msg.request_code);
++ if (!(bcm2835_data.msg.request_code & 0x80000000))
++ result = -1;
++ }
++
++ /* check if it was all ok and return the rate in milli degrees C */
++ if (result == 0)
++ *temp = (uint)bcm2835_data.msg.tag.val;
++ else
++ print_err("Failed to get temperature! (%x:%d)\n", tag_id, result);
++ print_debug("OUT");
++ return result;
++}
++
++static int bcm2835_get_temp(struct thermal_zone_device *thermal_dev, unsigned long *temp)
++{
++ return bcm2835_get_temp_or_max(thermal_dev, temp, VC_TAG_GET_TEMP);
++}
++
++static int bcm2835_get_max_temp(struct thermal_zone_device *thermal_dev, int trip_num, unsigned long *temp)
++{
++ return bcm2835_get_temp_or_max(thermal_dev, temp, VC_TAG_GET_MAX_TEMP);
++}
++
++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);
+diff -urN linux-3.10/drivers/thermal/Kconfig linux-rpi-3.10.y/drivers/thermal/Kconfig
+--- linux-3.10/drivers/thermal/Kconfig 2013-06-30 23:13:29.000000000 +0100
++++ linux-rpi-3.10.y/drivers/thermal/Kconfig 2013-07-06 15:25:50.000000000 +0100
+@@ -169,4 +169,11 @@
+ 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
++
+diff -urN linux-3.10/drivers/thermal/Makefile linux-rpi-3.10.y/drivers/thermal/Makefile
+--- linux-3.10/drivers/thermal/Makefile 2013-06-30 23:13:29.000000000 +0100
++++ linux-rpi-3.10.y/drivers/thermal/Makefile 2013-07-06 15:25:50.000000000 +0100
+@@ -23,4 +23,5 @@
+ 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
+