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[v5,1/2] dt-bindings: timer: Add binding doc for nxp system counter timer

Message ID 20190605064546.29249-1-ping.bai@nxp.com
State Not Applicable, archived
Headers show
Series [v5,1/2] dt-bindings: timer: Add binding doc for nxp system counter timer | expand

Commit Message

Jacky Bai June 5, 2019, 6:40 a.m. UTC 
From: Bai Ping <ping.bai@nxp.com>

Add the binding doc for nxp system counter timer module.

Signed-off-by: Bai Ping <ping.bai@nxp.com>
Reviewed-by: Rob Herring <robh@kernel.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
change v4->v5
 - 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
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Patch

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@306a0000 {
+		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>;
+	};