VAR-SOM-MX6 USB OTG host: Difference between revisions

Revision as of 06:19, 14 December 2015

VAR-SOM-MX6 - USB OTG Host

By default the OTG is configure to be "host". You can switch it to "peripheral" if you change the dr_mode in the device tree.

&usbotg {
	vbus-supply = <&reg_usb_otg_vbus>;
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_usbotg_var>;
	disable-over-current;
	/* dr_mode: One of "host", "peripheral" or "otg". Defaults to "otg" */
	dr_mode = "host" ;
	status = "okay";
};

build Linux out of tree.
edit arch/arm/boot/dts/imx6qdl-var-som.dtsi
Change the dr_mode in usbotg section
re build the device tree with

$ make ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- imx6q-var-som.dtb

copy the file to the sd-card or re flash it to nand. See the relevant section in the WIKI.

@@ Line 1: / Line 1: @@
-{{PageHeader|VAR-SOM-MX6 - USB OTG HOST}} {{DocImage|category1=VAR-SOM-MX6|category2=Yocto}} __toc__
+{{PageHeader|VAR-SOM-MX6 - USB OTG Host}} {{DocImage|category1=VAR-SOM-MX6|category2=Yocto}} __toc__
+By default the OTG is configure to be "host". You can switch it to  "peripheral" if you change the dr_mode in the device tree.<br>
+<pre>
+&usbotg {
+	vbus-supply = <&reg_usb_otg_vbus>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_usbotg_var>;
+	disable-over-current;
+	/* dr_mode: One of "host", "peripheral" or "otg". Defaults to "otg" */
+	dr_mode = "host" ;
+	status = "okay";
+};
+</pre>
+* build Linux out of tree.
+* edit arch/arm/boot/dts/imx6qdl-var-som.dtsi
+* Change the dr_mode in usbotg section
+* re build the device tree with
+<pre>$ make ARCH=arm CROSS_COMPILE=arm-poky-linux-gnueabi- imx6q-var-som.dtb
+</pre>
+copy the file to the sd-card or re flash it to nand. See the relevant section in the WIKI.