Merge tag 'at91-cleanup3' of git://git.kernel.org/pub/scm/linux/kernel/git/nferre/linux-at91 into next/drivers

Merge "at91: cleanup for 4.1 #3" from Nicolas Ferre:

Third batch of cleanup for 4.1:
- System Timer (ST) for at91rm9200 re-work (syscon/regmap):
  - watchdog
  - restart handler
  - timer as a proper clocksource
  => remove mach dependency + cleanup

* tag 'at91-cleanup3' of git://git.kernel.org/pub/scm/linux/kernel/git/nferre/linux-at91: (54 commits)
  ARM: at91: remove useless include
  clocksource: atmel-st: remove mach/hardware dependency
  clocksource: atmel-st: use syscon/regmap
  ARM: at91: time: move the system timer driver to drivers/clocksource
  ARM: at91: properly initialize timer
  ARM: at91: at91rm9200: remove deprecated arm_pm_restart
  watchdog: at91rm9200: implement restart handler
  watchdog: at91rm9200: use the system timer syscon
  mfd: syscon: Add atmel system timer registers definition
  ARM: at91/dt: declare atmel,at91rm9200-st as a syscon
  ARM: at91: remove old setup
  ARM: at91: sama5d4: remove useless map_io
  ARM: at91: sama5 use SoC detection infrastructure
  ARM: at91: at91sam9: use SoC detection infrastructure
  ARM: at91: at91rm9200 use SoC detection infrastructure
  ARM: at91: add soc detection infrastructure
  ARM: at91/dt: introduce atmel,<chip>-dbgu
  ARM: at91: remove unused _matrix.h headers
  ARM: at91: remove unused at91_ioremap_matrix and header
  ARM: at91: remove NEED_MACH_IO_H
  ...

Signed-off-by: Olof Johansson <olof@lixom.net>

3 files changed, 10 insertions, 2 deletions

diff --git a/Documentation/devicetree/bindings/arm/atmel-at91.txt b/Documentation/devicetree/bindings/arm/atmel-at91.txt
index ad319f84f560..2e99b5b57350 100644
--- a/Documentation/devicetree/bindings/arm/atmel-at91.txt
+++ b/Documentation/devicetree/bindings/arm/atmel-at91.txt
@@ -46,10 +46,12 @@ PIT Timer required properties:
   shared across all System Controller members.
 
 System Timer (ST) required properties:
-- compatible: Should be "atmel,at91rm9200-st"
+- compatible: Should be "atmel,at91rm9200-st", "syscon", "simple-mfd"
 - reg: Should contain registers location and length
 - interrupts: Should contain interrupt for the ST which is the IRQ line
   shared across all System Controller members.
+Its subnodes can be:
+- watchdog: compatible should be "atmel,at91rm9200-wdt"
 
 TC/TCLIB Timer required properties:
 - compatible: Should be "atmel,<chip>-tcb".
diff --git a/Documentation/devicetree/bindings/serial/atmel-usart.txt b/Documentation/devicetree/bindings/serial/atmel-usart.txt
index a6391e70a8fd..90787aa2e648 100644
--- a/Documentation/devicetree/bindings/serial/atmel-usart.txt
+++ b/Documentation/devicetree/bindings/serial/atmel-usart.txt
@@ -1,9 +1,10 @@
 * Atmel Universal Synchronous Asynchronous Receiver/Transmitter (USART)
 
 Required properties:
-- compatible: Should be "atmel,<chip>-usart"
+- compatible: Should be "atmel,<chip>-usart" or "atmel,<chip>-dbgu"
   The compatible <chip> indicated will be the first SoC to support an
   additional mode or an USART new feature.
+  For the dbgu UART, use "atmel,<chip>-dbgu", "atmel,<chip>-usart"
 - reg: Should contain registers location and length
 - interrupts: Should contain interrupt
 - clock-names: tuple listing input clock names.
diff --git a/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt b/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt
index f90e294d7631..a4d869744f59 100644
--- a/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/atmel-wdt.txt
@@ -26,6 +26,11 @@ Optional properties:
 - atmel,disable : Should be present if you want to disable the watchdog.
 - atmel,idle-halt : Should be present if you want to stop the watchdog when
         entering idle state.
+        CAUTION: This property should be used with care, it actually makes the
+        watchdog not counting when the CPU is in idle state, therefore the
+        watchdog reset time depends on mean CPU usage and will not reset at all
+        if the CPU stop working while it is in idle state, which is probably
+        not what you want.
 - atmel,dbg-halt : Should be present if you want to stop the watchdog when
         entering debug state.