phy: Add a driver for dm816x USB PHY

Add a minimal driver for dm816x USB. This makes USB work on dm816x
without any other changes needed as it can use the existing musb_dsps
glue layer for the USB controller.

Note that this phy is different from dm814x and am335x.

Cc: Bin Liu <binmlist@gmail.com>
Cc: Brian Hutchinson <b.hutchman@gmail.com>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Matthijs van Duin <matthijsvanduin@gmail.com>
Cc: Paul Bolle <pebolle@tiscali.nl>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/phy/dm816x-phy.txt b/Documentation/devicetree/bindings/phy/dm816x-phy.txt
new file mode 100644
index 000000000000..2fe3d11d063d
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/dm816x-phy.txt
@@ -0,0 +1,24 @@
+Device tree binding documentation for am816x USB PHY
+=========================
+
+Required properties:
+- compatible : should be "ti,dm816x-usb-phy"
+- reg : offset and length of the PHY register set.
+- reg-names : name for the phy registers
+- clocks : phandle to the clock
+- clock-names : name of the clock
+- syscon: phandle for the syscon node to access misc registers
+- #phy-cells : from the generic PHY bindings, must be 1
+- syscon: phandle for the syscon node to access misc registers
+
+Example:
+
+usb_phy0: usb-phy@20 {
+	compatible = "ti,dm8168-usb-phy";
+	reg = <0x20 0x8>;
+	reg-names = "phy";
+	clocks = <&main_fapll 6>;
+	clock-names = "refclk";
+	#phy-cells = <0>;
+	syscon = <&scm_conf>;
+};