openwrt-owl/target/linux/mvebu/patches-3.10/0193-clocksource-armada-370-xp-Fix-device-tree-binding.patch

From ba47ab198541f6ed822b3c9691b392d83edba8b4 Mon Sep 17 00:00:00 2001
From: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Date: Tue, 13 Aug 2013 11:43:14 -0300
Subject: [PATCH 193/203] clocksource: armada-370-xp: Fix device-tree binding

This commit fixes the DT binding for the Armada 370/XP SoC timer.
The previous "marvell,armada-370-xp-timer" compatible is removed and
two new compatible strings are introduced: "marvell,armada-xp-timer"
and "marvell,armada-370-timer".

The rationale behind this change is that the Armada 370 SoC and the
Armada XP SoC timers are not really compatible:

  * Armada 370 has no 25 MHz fixed timer.

  * Armada XP cannot work properly without such 25 MHz fixed timer
    as doing otherwise leads to using a clocksource whose frequency
    varies when doing cpufreq frequency changes.

This commit also removes the "marvell,timer-25Mhz" property, given
it's now meaningless.

Cc: devicetree@vger.kernel.org
Acked-by: Jason Cooper <jason@lakedaemon.net>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 .../bindings/timer/marvell,armada-370-xp-timer.txt | 27 ++++++++++++++++++----
 1 file changed, 22 insertions(+), 5 deletions(-)

--- a/Documentation/devicetree/bindings/timer/marvell,armada-370-xp-timer.txt
+++ b/Documentation/devicetree/bindings/timer/marvell,armada-370-xp-timer.txt
@@ -2,14 +2,31 @@ Marvell Armada 370 and Armada XP Timers
 ---------------------------------------
 
 Required properties:
-- compatible: Should be "marvell,armada-370-xp-timer"
+- compatible: Should be either "marvell,armada-370-timer" or
+  "marvell,armada-xp-timer" as appropriate.
 - interrupts: Should contain the list of Global Timer interrupts and
   then local timer interrupts
 - reg: Should contain location and length for timers register. First
   pair for the Global Timer registers, second pair for the
   local/private timers.
-- clocks: clock driving the timer hardware
+- clocks: clock driving the timer hardware, only required for
+  "marvell,armada-370-timer";
 
-Optional properties:
-- marvell,timer-25Mhz: Tells whether the Global timer supports the 25
-  Mhz fixed mode (available on Armada XP and not on Armada 370)
+Examples:
+
+- Armada 370:
+
+	timer {
+		compatible = "marvell,armada-370-timer";
+		reg = <0x20300 0x30>, <0x21040 0x30>;
+		interrupts = <37>, <38>, <39>, <40>, <5>, <6>;
+		clocks = <&coreclk 2>;
+	};
+
+- Armada XP:
+
+	timer {
+		compatible = "marvell,armada-xp-timer";
+		reg = <0x20300 0x30>, <0x21040 0x30>;
+		interrupts = <37>, <38>, <39>, <40>, <5>, <6>;
+	};