USB: chipidea: add imx usbmisc support
i.MX usb controllers share non-core registers, which may include
SoC specific controls. We turn it into a usbmisc device and usbmisc
driver set operations needed by ci13xxx_imx driver.
For example, Sabrelite board has bad over-current design, we can
usbmisc to disable over-current detection.
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Richard Zhao <richard.zhao@freescale.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/Documentation/devicetree/bindings/usb/ci13xxx-imx.txt b/Documentation/devicetree/bindings/usb/ci13xxx-imx.txt
index 2c29041..5778b9c 100644
--- a/Documentation/devicetree/bindings/usb/ci13xxx-imx.txt
+++ b/Documentation/devicetree/bindings/usb/ci13xxx-imx.txt
@@ -7,7 +7,10 @@
Optional properties:
- fsl,usbphy: phandler of usb phy that connects to the only one port
+- fsl,usbmisc: phandler of non-core register device, with one argument
+ that indicate usb controller index
- vbus-supply: regulator for vbus
+- disable-over-current: disable over current detect
Examples:
usb@02184000 { /* USB OTG */
@@ -15,4 +18,6 @@
reg = <0x02184000 0x200>;
interrupts = <0 43 0x04>;
fsl,usbphy = <&usbphy1>;
+ fsl,usbmisc = <&usbmisc 0>;
+ disable-over-current;
};
diff --git a/Documentation/devicetree/bindings/usb/usbmisc-imx.txt b/Documentation/devicetree/bindings/usb/usbmisc-imx.txt
new file mode 100644
index 0000000..97ce94e
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/usbmisc-imx.txt
@@ -0,0 +1,14 @@
+* Freescale i.MX non-core registers
+
+Required properties:
+- #index-cells: Cells used to descibe usb controller index. Should be <1>
+- compatible: Should be one of below:
+ "fsl,imx6q-usbmisc" for imx6q
+- reg: Should contain registers location and length
+
+Examples:
+usbmisc@02184800 {
+ #index-cells = <1>;
+ compatible = "fsl,imx6q-usbmisc";
+ reg = <0x02184800 0x200>;
+};