usb: gadget: s3c-hsotg: Allow driver instantiation using device tree

This patch adds OF match table to the driver to allow instantiating it
using device tree.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/usb/samsung-hsotg.txt b/Documentation/devicetree/bindings/usb/samsung-hsotg.txt
new file mode 100644
index 000000000000..b83d428a265e
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/samsung-hsotg.txt
@@ -0,0 +1,40 @@
+Samsung High Speed USB OTG controller
+-----------------------------
+
+The Samsung HSOTG IP can be found on Samsung SoCs, from S3C6400 onwards.
+It gives functionality of OTG-compliant USB 2.0 host and device with
+support for USB 2.0 high-speed (480Mbps) and full-speed (12 Mbps)
+operation.
+
+Currently only device mode is supported.
+
+Binding details
+-----
+
+Required properties:
+- compatible: "samsung,s3c6400-hsotg" should be used for all currently
+    supported SoC,
+- interrupt-parent: phandle for the interrupt controller to which the
+    interrupt signal of the HSOTG block is routed,
+- interrupts: specifier of interrupt signal of interrupt controller,
+    according to bindings of interrupt controller,
+- clocks: contains an array of clock specifiers:
+    - first entry: OTG clock
+- clock-names: contains array of clock names:
+    - first entry: must be "otg"
+- vusb_d-supply: phandle to voltage regulator of digital section,
+- vusb_a-supply: phandle to voltage regulator of analog section.
+
+Example
+-----
+
+        hsotg@12480000 {
+                compatible = "samsung,s3c6400-hsotg";
+                reg = <0x12480000 0x20000>;
+                interrupts = <0 71 0>;
+                clocks = <&clock 305>;
+                clock-names = "otg";
+                vusb_d-supply = <&vusb_reg>;
+                vusb_a-supply = <&vusbdac_reg>;
+        };
+