mediatek: add support for the new MT7623 Arm SoC

the support is still WIP. next steps are to make the pmic and ethernet work.
this is the first commit to make sure nothing gets lost.

Signed-off-by: John Crispin <blogic@openwrt.org>

SVN-Revision: 47354

1 files changed, 124 insertions, 0 deletions

diff --git a/target/linux/mediatek/patches/0020-thermal-thermal-Add-support-for-hardware-tracked-tri.patch b/target/linux/mediatek/patches/0020-thermal-thermal-Add-support-for-hardware-tracked-tri.patch
new file mode 100644
index 0000000000..6a48350039
--- /dev/null
+++ b/target/linux/mediatek/patches/0020-thermal-thermal-Add-support-for-hardware-tracked-tri.patch
@@ -0,0 +1,124 @@
+From 346632bc00fe71c269709702fecb474bb22e933e Mon Sep 17 00:00:00 2001
+From: Sascha Hauer <s.hauer@pengutronix.de>
+Date: Wed, 13 May 2015 10:52:39 +0200
+Subject: [PATCH 20/76] thermal: thermal: Add support for hardware-tracked
+ trip points
+
+This adds support for hardware-tracked trip points to the device tree
+thermal sensor framework.
+
+The framework supports an arbitrary number of trip points. Whenever
+the current temperature is updated, the trip points immediately
+below and above the current temperature are found. A .set_trips
+callback is then called with the temperatures. If there is no trip
+point above or below the current temperature, the passed trip
+temperature will be -INT_MAX or INT_MAX respectively. In this callback,
+the driver should program the hardware such that it is notified
+when either of these trip points are triggered. When a trip point
+is triggered, the driver should call `thermal_zone_device_update'
+for the respective thermal zone. This will cause the trip points
+to be updated again.
+
+If .set_trips is not implemented, the framework behaves as before.
+
+This patch is based on an earlier version from Mikko Perttunen
+<mikko.perttunen@kapsi.fi>
+
+Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
+---
+ drivers/thermal/thermal_core.c |   43 ++++++++++++++++++++++++++++++++++++++++
+ include/linux/thermal.h        |    3 +++
+ 2 files changed, 46 insertions(+)
+
+diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
+index 6bbf61f..3ae1795 100644
+--- a/drivers/thermal/thermal_core.c
++++ b/drivers/thermal/thermal_core.c
+@@ -453,6 +453,45 @@ int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp)
+ }
+ EXPORT_SYMBOL_GPL(thermal_zone_get_temp);
+ 
++static void thermal_zone_set_trips(struct thermal_zone_device *tz)
++{
++	int low = -INT_MAX;
++	int high = INT_MAX;
++	int trip_temp, hysteresis;
++	int temp = tz->temperature;
++	int i;
++
++	if (!tz->ops->set_trips)
++		return;
++
++	/* No need to change trip points */
++	if (temp > tz->prev_low_trip && temp < tz->prev_high_trip)
++		return;
++
++	for (i = 0; i < tz->trips; i++) {
++		int trip_low;
++
++		tz->ops->get_trip_temp(tz, i, &trip_temp);
++		tz->ops->get_trip_hyst(tz, i, &hysteresis);
++
++		trip_low = trip_temp - hysteresis;
++
++		if (trip_low < temp && trip_low > low)
++			low = trip_low;
++
++		if (trip_temp > temp && trip_temp < high)
++			high = trip_temp;
++	}
++
++	tz->prev_low_trip = low;
++	tz->prev_high_trip = high;
++
++	dev_dbg(&tz->device, "new temperature boundaries: %d < x < %d\n",
++			low, high);
++
++	tz->ops->set_trips(tz, low, high);
++}
++
+ void thermal_zone_device_update(struct thermal_zone_device *tz)
+ {
+ 	int temp, ret, count;
+@@ -479,6 +518,8 @@ void thermal_zone_device_update(struct thermal_zone_device *tz)
+ 	dev_dbg(&tz->device, "last_temperature=%d, current_temperature=%d\n",
+ 				tz->last_temperature, tz->temperature);
+ 
++	thermal_zone_set_trips(tz);
++
+ 	for (count = 0; count < tz->trips; count++)
+ 		handle_thermal_trip(tz, count);
+ }
+@@ -1494,6 +1535,8 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type,
+ 	tz->trips = trips;
+ 	tz->passive_delay = passive_delay;
+ 	tz->polling_delay = polling_delay;
++	tz->prev_low_trip = INT_MAX;
++	tz->prev_high_trip = -INT_MAX;
+ 
+ 	dev_set_name(&tz->device, "thermal_zone%d", tz->id);
+ 	result = device_register(&tz->device);
+diff --git a/include/linux/thermal.h b/include/linux/thermal.h
+index 07bd5e8..aef6e13 100644
+--- a/include/linux/thermal.h
++++ b/include/linux/thermal.h
+@@ -87,6 +87,7 @@ struct thermal_zone_device_ops {
+ 	int (*unbind) (struct thermal_zone_device *,
+ 		       struct thermal_cooling_device *);
+ 	int (*get_temp) (struct thermal_zone_device *, int *);
++	int (*set_trips) (struct thermal_zone_device *, int, int);
+ 	int (*get_mode) (struct thermal_zone_device *,
+ 			 enum thermal_device_mode *);
+ 	int (*set_mode) (struct thermal_zone_device *,
+@@ -180,6 +181,8 @@ struct thermal_zone_device {
+ 	int last_temperature;
+ 	int emul_temperature;
+ 	int passive;
++	int prev_low_trip;
++	int prev_high_trip;
+ 	unsigned int forced_passive;
+ 	const struct thermal_zone_device_ops *ops;
+ 	const struct thermal_zone_params *tzp;
+-- 
+1.7.10.4
+