From: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Date: Tue, 22 Jul 2014 00:25:26 +0000 (-0700)
Subject: devicetree: cadence_ttc: Document binding for timer width
X-Git-Tag: v4.2-rc1~99^2~24^2~3
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=0385d4464012f5b9a602311acfaa4902183d0ad5;p=karo-tx-linux.git

devicetree: cadence_ttc: Document binding for timer width

Modern TTC implementations can extend the timer width to 32 bit. This
feature is not self identifying so the driver needs to be made aware
via device tree.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
---

diff --git a/Documentation/devicetree/bindings/timer/cadence,ttc-timer.txt b/Documentation/devicetree/bindings/timer/cadence,ttc-timer.txt
index 993695c659e1..eeee6cd51e5c 100644
--- a/Documentation/devicetree/bindings/timer/cadence,ttc-timer.txt
+++ b/Documentation/devicetree/bindings/timer/cadence,ttc-timer.txt
@@ -6,6 +6,9 @@ Required properties:
 - interrupts : A list of 3 interrupts; one per timer channel.
 - clocks: phandle to the source clock
 
+Optional properties:
+- timer-width: Bit width of the timer, necessary if not 16.
+
 Example:
 
 ttc0: ttc0@f8001000 {
@@ -14,4 +17,5 @@ ttc0: ttc0@f8001000 {
 	compatible = "cdns,ttc";
 	reg = <0xF8001000 0x1000>;
 	clocks = <&cpu_clk 3>;
+	timer-width = <32>;
 };