Add the binding doc for nxp system counter timer module.
Signed-off-by: Bai Ping <[email protected]>
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change v1->v2
- remove the blank line at EOF
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.../devicetree/bindings/timer/nxp,sysctr_timer.txt | 26 ++++++++++++++++++++++
1 file changed, 26 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
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index 0000000..21f1527
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+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.
+
+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 compare frames' interrupt
+- clock-frequency : Specifies the counter clock frequency.
+
+Example:
+
+ system_counter: timer@306a0000 {
+ compatible = "nxp,sysctr-timer";
+ reg = <0x0 0x306a0000 0x0 0x10000>, /* system-counter-rd base */
+ <0x0 0x306b0000 0x0 0x10000>, /* system-counter-cmp base
*/
+ <0x0 0x306c0000 0x0 0x10000>; /* system-counter-ctrl base
*/
+ clock-frequency = <8000000>;
+ interrupts = <GIC_SPI 47 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>;
+ };
--
1.9.1
