linux-kernel - [PATCH v3 3/3] dt-bindings: timer: Add andestech atcpit100 timer binding doc

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Message-Id: <1510039193-32522-4-git-send-email-rickchen36@gmail.com>
Date:   Tue,  7 Nov 2017 15:19:53 +0800
From:   Rick Chen <rickchen36@...il.com>
To:     daniel.lezcano@...aro.org, tglx@...utronix.de, robh@...nel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        rick@...estech.com
Cc:     Rick Chen <rickchen36@...il.com>, Greentime Hu <green.hu@...il.com>
Subject: [PATCH v3 3/3] dt-bindings: timer: Add andestech atcpit100 timer binding doc

Add a document to describe Andestech atcpit100 timer and
binding information.

Signed-off-by: Rick Chen <rickchen36@...il.com>
Acked-by: Rob Herring <robh@...nel.org>
Signed-off-by: Greentime Hu <green.hu@...il.com>
---
 .../bindings/timer/andestech,atcpit100-timer.txt   | 31 ++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/andestech,atcpit100-timer.txt

diff --git a/Documentation/devicetree/bindings/timer/andestech,atcpit100-timer.txt b/Documentation/devicetree/bindings/timer/andestech,atcpit100-timer.txt
new file mode 100644
index 0000000..a87278a
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/andestech,atcpit100-timer.txt
@@ -0,0 +1,31 @@
+Andestech ATCPIT100 timer
+------------------------------------------------------------------
+ATCPIT100 is a generic IP block from Andes Technology, embedded in
+Andestech AE3XX platforms and other designs.
+
+This timer is a set of compact multi-function timers, which can be
+used as pulse width modulators (PWM) as well as simple timers.
+
+It supports up to 4 PIT channels. Each PIT channel is a
+multi-function timer and provide the following usage scenarios:
+One 32-bit timer
+Two 16-bit timers
+Four 8-bit timers
+One 16-bit PWM
+One 16-bit timer and one 8-bit PWM
+Two 8-bit timer and one 8-bit PWM
+
+Required properties:
+- compatible	: Should be "andestech,atcpit100"
+- reg		: Address and length of the register set
+- interrupts	: Reference to the timer interrupt
+- clock-frequency : The rate in HZ in input of the Andestech ATCPIT100 timer
+
+Examples:
+
+timer0: timer@...00000 {
+	compatible = "andestech,atcpit100";
+	reg = <0xf0400000 0x1000>;
+	interrupts = <2 4>;
+	clock-frequency = <30000000>;
+};
-- 
2.7.4