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@xxxxxxxxx>
Acked-by: Rob Herring <robh@xxxxxxxxxx>
---
v3:
- Add Acked-by,
- Drop "renesas,cccr", as the CCCR is not a lone register, but part of
the HPB/APB block, which will need its own set of bindings,
v2:
- New.
---
Documentation/devicetree/bindings/arm/shmobile.txt | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/Documentation/devicetree/bindings/arm/shmobile.txt b/Documentation/devicetree/bindings/arm/shmobile.txt
index a1e94da0e322c8f4..1be9e8a7e2c43dfc 100644
--- a/Documentation/devicetree/bindings/arm/shmobile.txt
+++ b/Documentation/devicetree/bindings/arm/shmobile.txt
@@ -81,3 +81,21 @@ Boards:
compatible = "renesas,sk-rzg1m", "renesas,r8a7743"
- 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>;
+ };
--
1.9.1
