[PATCH 6/7] dt-binding: riscv: sifive: add documentation for FU540-based boards

[Paul Walmsley]

Add DT binding documentation for boards based on the SiFive FU540 SoC.
The first board, the HiFive Unleashed A00 (FU540), is described here:

https://static.dev.sifive.com/HiFive-Unleashed-Getting-Started-Guide-v1p1.pdf

Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Palmer Dabbelt <palmer@xxxxxxxxxx>
Cc: Albert Ou <aou@xxxxxxxxxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: linux-riscv@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Paul Walmsley <paul.walmsley@xxxxxxxxxx>
Signed-off-by: Paul Walmsley <paul@xxxxxxxxx>
---
 .../devicetree/bindings/riscv/sifive/fu540.txt         | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/riscv/sifive/fu540.txt b/Documentation/devicetree/bindings/riscv/sifive/fu540.txt
index b5cf2b9f9a75..20119cc54964 100644
--- a/Documentation/devicetree/bindings/riscv/sifive/fu540.txt
+++ b/Documentation/devicetree/bindings/riscv/sifive/fu540.txt
@@ -12,3 +12,13 @@ compatible-string values:
 
 - Freedom Unleashed 540 rev. C000, or "FU540"
   compatible = "sifive,fu540-c000", "sifive,fu540"
+
+Boards
+------
+
+Boards based on the FU540 SoC should specify the following
+compatible-string values:
+
+- HiFive-Unleashed rev. A00 board
+  compatible = "sifive,hifive-unleashed-a00-fu540",
+	       "sifive,hifive-unleashed-fu540"
-- 
2.20.0