linux-kernel - [PATCH v2 5/7] ARM: shmobile: Document DT bindings for CCCR and PRR

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Message-Id: <1477913455-5314-6-git-send-email-geert+renesas@glider.be>
Date:   Mon, 31 Oct 2016 12:30:53 +0100
From:   Geert Uytterhoeven <geert+renesas@...der.be>
To:     Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Yangbo Lu <yangbo.lu@....com>,
        Simon Horman <horms@...ge.net.au>,
        Magnus Damm <magnus.damm@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     Dirk Behme <dirk.behme@...bosch.com>,
        linux-renesas-soc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linuxppc-dev@...ts.ozlabs.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH v2 5/7] ARM: shmobile: Document DT bindings for CCCR and PRR

Add device tree binding documentation for the Common Chip Code Register
and Product Register, which provide SoC product and revision
information.

Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
v2:
  - New.
---
 Documentation/devicetree/bindings/arm/shmobile.txt | 26 ++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/shmobile.txt b/Documentation/devicetree/bindings/arm/shmobile.txt
index 15669642b5324412..bff1b596b235c535 100644
--- a/Documentation/devicetree/bindings/arm/shmobile.txt
+++ b/Documentation/devicetree/bindings/arm/shmobile.txt
@@ -79,3 +79,29 @@ Boards:
     compatible = "renesas,sk-rzg1m", "renesas,r8a7743"
   - Wheat
     compatible = "renesas,wheat", "renesas,r8a7792"
+
+
+Most Renesas ARM SoCs have one or two registers (Common Chip Code
+Register and/or Product Register) that allow to retrieve SoC product and
+revision information.  If present, device nodes for these devices should
+be added.
+
+Required properties:
+  - compatible: Must be one of:
+      - "renesas,cccr" for the Common Chip Code Register,
+      - "renesas,prr" for the Product Register.
+  - reg: Base address and length of the register block.
+
+
+Examples
+--------
+
+	cccr: chipid@...0101c {
+		compatible = "renesas,cccr";
+		reg = <0xe600101c 4>;
+	};
+
+	prr: chipid@...00044 {
+		compatible = "renesas,prr";
+		reg = <0 0xff000044 0 4>;
+	};
-- 
1.9.1