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ARM: shmobile: Document DT bindings for Product Register 

Add device tree binding documentation for the Product Register (PRR),
which provides product and revision information on most Renesas ARM
SoCs.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Geert Uytterhoeven 2016-11-14 19:37:07 +01:00 committed by Simon Horman
parent da65a1589d
commit 5384f45cd9
1 changed files with 18 additions and 0 deletions
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18
Documentation/devicetree/bindings/arm/shmobile.txt
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@ -75,3 +75,21 @@ Boards:
compatible = "renesas,silk", "renesas,r8a7794"
- Wheat
compatible = "renesas,wheat", "renesas,r8a7792"
Most Renesas ARM SoCs have a Product Register that allows to retrieve SoC
product and revision information. If present, a device node for this register
should be added.
Required properties:
- compatible: Must be "renesas,prr".
- reg: Base address and length of the register block.
Examples
--------
prr: chipid@ff000044 {
compatible = "renesas,prr";
reg = <0 0xff000044 0 4>;
};