Document the bindings used by the Renesas R-Car Gen3 RPC controller.
Signed-off-by: Mason Yang <masonccyang@xxxxxxxxxxx>
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.../devicetree/bindings/spi/spi-renesas-rpc.txt | 38 ++++++++++++++++++++++
1 file changed, 38 insertions(+)
create mode 100644 Documentation/devicetree/bindings/spi/spi-renesas-rpc.txt
diff --git a/Documentation/devicetree/bindings/spi/spi-renesas-rpc.txt b/Documentation/devicetree/bindings/spi/spi-renesas-rpc.txt
new file mode 100644
index 0000000..a191f70
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+++ b/Documentation/devicetree/bindings/spi/spi-renesas-rpc.txt
@@ -0,0 +1,38 @@
+Renesas R-Car Gen3 RPC controller Device Tree Bindings
+------------------------------------------------------
+
+Required properties:
+- compatible: should be "renesas,r8a77995-rpc"
+- #address-cells: should be 1
+- #size-cells: should be 0
+- reg: should contain 2 entries, one for the registers and one for the direct
+ mapping area
+- reg-names: should contain "rpc_regs" and "dirmap"
+- interrupts: interrupt line connected to the RPC controller
+- clock-names: should contain "clk_rpc"
+- clocks: should contain 1 entries for the module's clock
+- rpc-mode: should contain "rpc-spi-flash" for rpc spi mode or
+ "rpc-hyperflash" for rpc hyerflash mode.
+
+Example:
+
+ rpc: rpc@ee200000 {
+ compatible = "renesas,r8a77995-rpc";
+ reg = <0 0xee200000 0 0x8100>, <0 0x08000000 0 0x4000000>;
+ reg-names = "rpc_regs", "dirmap";
+ clocks = <&cpg CPG_MOD 917>;
+ power-domains = <&sysc R8A77995_PD_ALWAYS_ON>;
+ resets = <&cpg 917>;
+ clock-names = "clk_rpc";
+ rpc-mode = "rpc-spi-flash";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ flash@0 {
+ compatible = "jedec,spi-nor";
+ reg = <0>;
+ spi-max-frequency = <40000000>;
+ spi-tx-bus-width = <1>;
+ spi-rx-bus-width = <1>;
+ };
+ };
--
1.9.1
