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[v3,2/8] rsb: sunxi: Add Allwinner Reduced Serial Bus (RSB) controller bindings

Message ID 1439958009-14056-3-git-send-email-wens@csie.org (mailing list archive)
State New, archived
Headers show

Commit Message

Chen-Yu Tsai Aug. 19, 2015, 4:20 a.m. UTC 
Recent Allwinner SoCs, starting with the A23, have a Reduced Serial Bus
(RSB) controller. This is used to talk to the PMIC, and later with the
A80 and A83 platform, the audio codec IC.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
 .../devicetree/bindings/rsb/rsb-sunxi.txt          | 34 ++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rsb/rsb-sunxi.txt
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diff --git a/Documentation/devicetree/bindings/rsb/rsb-sunxi.txt b/Documentation/devicetree/bindings/rsb/rsb-sunxi.txt
new file mode 100644
index 000000000000..057d24b84628
--- /dev/null
+++ b/Documentation/devicetree/bindings/rsb/rsb-sunxi.txt
@@ -0,0 +1,34 @@ 
+
+* Allwinner RSB (Reduced Serial Bus) controller
+
+Required properties :
+
+ - reg             : Offset and length of the register set for the controller.
+ - compatible      : Shall be "allwinner,sun8i-a23-rsb".
+ - interrupts      : The interrupt line associated to the RSB controller.
+ - clocks          : The gate clk associated to the RSB controller.
+ - resets          : The reset line associated to the RSB controller.
+ - #address-cells  : shall be 2
+ - #size-cells     : shall be 0
+
+Optional properties :
+
+ - clock-frequency : Desired RSB bus clock frequency in Hz. Maximum is 20MHz.
+		     If not set the current hardware setting shall be used.
+
+See rsb.txt for the generic RSB bindings for RSB slaves / child nodes.
+
+Example:
+
+	rsb@01f03400 {
+		compatible = "allwinner,sun8i-a23-rsb";
+		reg = <0x01f03400 0x400>;
+		interrupts = <0 39 4>;
+		clocks = <&apb0_gates 3>;
+		clock-frequency = <3000000>;
+		resets = <&apb0_rst 3>;
+		#address-cells = <2>;
+		#size-cells = <0>;
+
+		/* child nodes ... */
+	};