linux-kernel - [PATCH V6 25/33] dt-bindings: timer: C-SKY Multi-processor timer

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Message-Id: <c99ba49a3756d5595f4ce66aa706de11d821fafa.1538058840.git.ren_guo@c-sky.com>
Date:   Fri, 28 Sep 2018 08:51:22 +0800
From:   Guo Ren <ren_guo@...ky.com>
To:     akpm@...ux-foundation.org, arnd@...db.de,
        daniel.lezcano@...aro.org, davem@...emloft.net,
        gregkh@...uxfoundation.org, jason@...edaemon.net,
        marc.zyngier@....com, mark.rutland@....com,
        mchehab+samsung@...nel.org, peterz@...radead.org, robh@...nel.org,
        robh+dt@...nel.org, tglx@...utronix.de
Cc:     linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        devicetree@...r.kernel.org, green.hu@...il.com,
        Guo Ren <ren_guo@...ky.com>
Subject: [PATCH V6 25/33] 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>
---
 .../devicetree/bindings/timer/csky,mptimer.txt     | 46 ++++++++++++++++++++++
 1 file changed, 46 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..1e7e31d
--- /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
+	- interrupts
+		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>;
+	};
-- 
2.7.4