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Message-Id: <0f7cbde6462150c6ddb058d89d59ce35c3d6da9f.1539579760.git.ren_guo@c-sky.com>
Date: Mon, 15 Oct 2018 13:07:42 +0800
From: Guo Ren <ren_guo@...ky.com>
To: tglx@...utronix.de, jason@...edaemon.net, marc.zyngier@....com,
robh+dt@...nel.org, mark.rutland@....com,
daniel.lezcano@...aro.org, will.deacon@....com, jhogan@...nel.org,
paul.burton@...s.com, peterz@...radead.org, arnd@...db.de
Cc: linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
Guo Ren <ren_guo@...ky.com>
Subject: [PATCH V13 2/4] dt-bindings: timer: C-SKY Multi-processor timer
Dt-bingdings doc for C-SKY SMP system setting.
Signed-off-by: Guo Ren <ren_guo@...ky.com>
Reviewed-by: Rob Herring <robh@...nel.org>
---
Changelog:
- Drop the interrupt-parent.
---
---
.../devicetree/bindings/timer/csky,mptimer.txt | 42 ++++++++++++++++++++++
1 file changed, 42 insertions(+)
create mode 100644 Documentation/devicetree/bindings/timer/csky,mptimer.txt
diff --git a/Documentation/devicetree/bindings/timer/csky,mptimer.txt b/Documentation/devicetree/bindings/timer/csky,mptimer.txt
new file mode 100644
index 0000000..15cfec0
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/csky,mptimer.txt
@@ -0,0 +1,42 @@
+============================
+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
+ - interrupts
+ Usage: required
+ Value type: <u32>
+ Definition: must be timer irq num defined by soc
+
+Examples:
+---------
+
+ timer: timer {
+ compatible = "csky,mptimer";
+ clocks = <&dummy_apb_clk>;
+ interrupts = <16>;
+ interrupt-parent = <&intc>;
+ };
--
2.7.4
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