[PATCH v3 03/15] dt-bindings: Document the ARM System timer bindings

[Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx>]

From: Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx>

This adds documentation of device tree bindings for the
ARM System timer.

Signed-off-by: Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx>
---
 .../devicetree/bindings/arm/armv7m_systick.txt     | 26 ++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/armv7m_systick.txt

diff --git a/Documentation/devicetree/bindings/arm/armv7m_systick.txt b/Documentation/devicetree/bindings/arm/armv7m_systick.txt
new file mode 100644
index 0000000..7cf4a24
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/armv7m_systick.txt
@@ -0,0 +1,26 @@
+* ARMv7M System Timer
+
+ARMv7-M includes a system timer, known as SysTick. Current driver only
+implements the clocksource feature.
+
+Required properties:
+- compatible	  : Should be "arm,armv7m-systick"
+- reg		  : The address range of the timer
+
+Required clocking property, have to be one of:
+- clocks	  : The input clock of the timer
+- clock-frequency : The rate in HZ in input of the ARM SysTick
+
+Examples:
+
+systick: timer@e000e010 {
+	compatible = "arm,armv7m-systick";
+	reg = <0xe000e010 0x10>;
+	clocks = <&clk_systick>;
+};
+
+systick: timer@e000e010 {
+	compatible = "arm,armv7m-systick";
+	reg = <0xe000e010 0x10>;
+	clock-frequency = <90000000>;
+};
-- 
1.9.1

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