dt-bindings: reset: Add document for Broadcom STB reset controller

Add a binding document for the Broadcom STB reset controller, also known
as SW_INIT-style reset controller.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

diff --git a/Documentation/devicetree/bindings/reset/brcm,brcmstb-reset.txt b/Documentation/devicetree/bindings/reset/brcm,brcmstb-reset.txt
new file mode 100644 (file)
index 0000000..6e5341b
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/brcm,brcmstb-reset.txt
@@ -0,0 +1,27 @@
+Broadcom STB SW_INIT-style reset controller
+===========================================
+
+Broadcom STB SoCs have a SW_INIT-style reset controller with separate
+SET/CLEAR/STATUS registers and possibly multiple banks, each of 32 bit
+reset lines.
+
+Please also refer to reset.txt in this directory for common reset
+controller binding usage.
+
+Required properties:
+- compatible: should be brcm,brcmstb-reset
+- reg: register base and length
+- #reset-cells: must be set to 1
+
+Example:
+
+       reset: reset-controller@8404318 {
+               compatible = "brcm,brcmstb-reset";
+               reg = <0x8404318 0x30>;
+               #reset-cells = <1>;
+       };
+
+       &ethernet_switch {
+               resets = <&reset>;
+               reset-names = "switch";
+       };