[PATCH RESEND 4/5] Documentation: add the Marvell Berlin pinctrl documentation

[Antoine Ténart]

Signed-off-by: Antoine Ténart <antoine.tenart at free-electrons.com>
---
 .../bindings/pinctrl/marvell,berlin-pinctrl.txt    | 43 ++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/marvell,berlin-pinctrl.txt

diff --git a/Documentation/devicetree/bindings/pinctrl/marvell,berlin-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/marvell,berlin-pinctrl.txt
new file mode 100644
index 000000000000..e21538a37734
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/marvell,berlin-pinctrl.txt
@@ -0,0 +1,43 @@
+* Pinctrl driver for the Marvell Berlin SoCs
+
+The pins controlled by the Marvell Berlin controller are organized in groups.
+Configuration is done by group, so no actual pin information is needed.
+
+Required properties:
+- compatible:	"marvell-berlin2cd-pinctrl",
+		"marvell-berlin2-pinctrl",
+		"marvell-berlin2q-pinctrl"
+- reg: registers physical addresses and lengths of the pin controller.
+- reg-names: name of the register regions.
+
+Please refer to pinctrl-bindings.txt in this directory for details of the
+common pinctrl bindings used by client devices.
+
+A pinctrl should contains subnodes representing the pinctrl pin group
+configurations, one per group. Each subnode has the group name and the muxing
+function used.
+
+Required subnode-properties:
+- berlin,group: a string describing the group's name.
+- berlin,function: the function used to mux the group.
+	0: function 0
+	1: function 1
+	...
+
+Example:
+
+pinctrl: pinctrl at 0 {
+	compatible = "marvell,berlin2q-pinctrl";
+	reg = <0xea0000 0x08>, <0xfc0000 0x44>;
+	reg-names = "global_base", "sm_base";
+
+	uart0_pmux: uart0-pmux {
+		berlin,group = "GSM12";
+		berlin,function = <0>;
+	};
+}
+
+&uart0 {
+	pinctrl-0 = <&uart0_pmux>;
+	pinctrl-names = "default";
+};
-- 
1.8.3.2