linux-kernel - [PATCH v4 2/3] clocksource: keystone: add bindings for keystone timer

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Date:	Tue, 4 Feb 2014 13:30:52 +0200
From:	Ivan Khoronzhuk <ivan.khoronzhuk@...com>
To:	<santosh.shilimkar@...com>, <rob@...dley.net>,
	<linux@....linux.org.uk>, <galak@...eaurora.org>
CC:	<robh+dt@...nel.org>, <pawel.moll@....com>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>, <daniel.lezcano@...aro.org>,
	<tglx@...utronix.de>, <devicetree@...r.kernel.org>,
	<linux-doc@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <grygorii.strashko@...com>,
	Ivan Khoronzhuk <ivan.khoronzhuk@...com>
Subject: [PATCH v4 2/3] clocksource: keystone: add bindings for keystone timer

This patch provides bindings for the 64-bit timer in the KeyStone
architecture devices. The timer can be configured as a general-purpose 64-bit
timer, dual general-purpose 32-bit timers. When configured as dual 32-bit
timers, each half can operate in conjunction (chain mode) or independently
(unchained mode) of each other.

It is global timer is a free running up-counter and can generate interrupt
when the counter reaches preset counter values.

Documentation:
http://www.ti.com/lit/ug/sprugv5a/sprugv5a.pdf

Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@...com>
---
 .../bindings/timer/ti,keystone-timer.txt           | 29 ++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/ti,keystone-timer.txt

diff --git a/Documentation/devicetree/bindings/timer/ti,keystone-timer.txt b/Documentation/devicetree/bindings/timer/ti,keystone-timer.txt
new file mode 100644
index 0000000..5fbe361
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/ti,keystone-timer.txt
@@ -0,0 +1,29 @@
+* Device tree bindings for Texas instruments Keystone timer
+
+This document provides bindings for the 64-bit timer in the KeyStone
+architecture devices. The timer can be configured as a general-purpose 64-bit
+timer, dual general-purpose 32-bit timers. When configured as dual 32-bit
+timers, each half can operate in conjunction (chain mode) or independently
+(unchained mode) of each other.
+
+It is global timer is a free running up-counter and can generate interrupt
+when the counter reaches preset counter values.
+
+Documentation:
+http://www.ti.com/lit/ug/sprugv5a/sprugv5a.pdf
+
+Required properties:
+
+- compatible : should be "ti,keystone-timer".
+- reg : specifies base physical address and count of the registers.
+- interrupts : interrupt generated by the timer.
+- clocks : the clock feeding the timer clock.
+
+Example:
+
+timer@...0000 {
+	compatible = "ti,keystone-timer";
+	reg = <0x022f0000 0x80>;
+	interrupts = <GIC_SPI 110 IRQ_TYPE_EDGE_RISING>;
+	clocks = <&clktimer15>;
+};
-- 
1.8.3.2

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