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[V3,20/27] dt-bindings: timer: C-SKY Multi-processor timer

Message ID e301225bda1dc8dfe7aa5b1b2bbe83b82403f47d.1536757532.git.ren_guo@c-sky.com
State Superseded, archived
Headers show
Series C-SKY(csky) Linux Kernel Port | expand

Commit Message

Guo Ren Sept. 12, 2018, 1:24 p.m. UTC 
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
---
 .../devicetree/bindings/timer/csky,mptimer.txt     | 46 ++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/csky,mptimer.txt
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Patch

diff --git a/Documentation/devicetree/bindings/timer/csky,mptimer.txt b/Documentation/devicetree/bindings/timer/csky,mptimer.txt
new file mode 100644
index 0000000..0d7369f
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/csky,mptimer.txt
@@ -0,0 +1,46 @@ 
+============================
+C-SKY Multi-processors Timer
+============================
+
+C-SKY multi-processors timer is designed for C-SKY SMP system and the
+regs is accessed by cpu co-processor 4 registers with mtcr/mfcr.
+
+ - PTIM_CTLR "cr<0, 14>" Control reg to start reset timer.
+ - PTIM_TSR  "cr<1, 14>" Interrupt cleanup status reg.
+ - PTIM_CCVR "cr<3, 14>" Current counter value reg.
+ - PTIM_LVR  "cr<6, 14>" Window value reg to triger next event.
+
+==============================
+timer node bindings definition
+==============================
+
+        Description: Describes SMP timer
+
+        PROPERTIES
+
+        - compatible
+                Usage: required
+                Value type: <string>
+                Definition: must be "csky,mptimer"
+	- clocks
+		Usage: required
+		Value type: <node>
+                Definition: must be input clk node
+        - interrupt
+                Usage: required
+                Value type: <u32>
+                Definition: must be timer irq num defined by soc
+        - interrupt-parent:
+                Usage: required
+		Value type: <node>
+                Definition: must be interrupt controller node
+
+Examples:
+---------
+
+	timer: timer {
+		compatible = "csky,mptimer";
+		clocks = <&dummy_apb_clk>;
+		interrupts = <16>;
+		interrupt-parent = <&intc>;
+	};