linux-kernel - [PATCH v4 1/2] dt-bindings: timer: Add binding doc for nxp system counter timer

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Message-ID: <20190521072355.12928-1-ping.bai@nxp.com>
Date:   Tue, 21 May 2019 07:18:48 +0000
From:   Jacky Bai <ping.bai@....com>
To:     "daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        Aisheng Dong <aisheng.dong@....com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>
Subject: [PATCH v4 1/2] dt-bindings: timer: Add binding doc for nxp system
 counter timer

From: Bai Ping <ping.bai@....com>

Add the binding doc for nxp system counter timer module.

Signed-off-by: Bai Ping <ping.bai@....com>
Reviewed-by: Rob Herring <robh@...nel.org>
---
change v1->v2
 - remove the blank line at EOF
change v2->v3
 - update the binding example based on the driver change
change v3->v4
 - no change
---
 .../bindings/timer/nxp,sysctr-timer.txt       | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/nxp,sysctr-timer.txt

diff --git a/Documentation/devicetree/bindings/timer/nxp,sysctr-timer.txt b/Documentation/devicetree/bindings/timer/nxp,sysctr-timer.txt
new file mode 100644
index 000000000000..d57659996d62
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/nxp,sysctr-timer.txt
@@ -0,0 +1,25 @@
+NXP System Counter Module(sys_ctr)
+
+The system counter(sys_ctr) is a programmable system counter which provides
+a shared time base to Cortex A15, A7, A53, A73, etc. it is intended for use in
+applications where the counter is always powered and support multiple,
+unrelated clocks. The compare frame inside can be used for timer purpose.
+
+Required properties:
+
+- compatible :      should be "nxp,sysctr-timer"
+- reg :             Specifies the base physical address and size of the comapre
+                    frame and the counter control, read & compare.
+- interrupts :      should be the first compare frames' interrupt
+- clocks : 	    Specifies the counter clock.
+- clock-names: 	    Specifies the clock's name of this module
+
+Example:
+
+	system_counter: timer@...a0000 {
+		compatible = "nxp,sysctr-timer";
+		reg = <0x306a0000 0x20000>;/* system-counter-rd & compare */
+		clocks = <&clk_8m>;
+		clock-names = "per";
+		interrupts = <GIC_SPI 47 IRQ_TYPE_LEVEL_HIGH>;
+	};
-- 
2.21.0