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7542babca MLK-18878 DTS: imx8mq: Change USB nodes compatible strings ... Browse Code »
2

We enabled the DM for xhci-imx8m driver which uses compatible string
"fsl, imx8mq-dwc3". But found a issue that u-boot will get four USB bus not two.
The reason is the low level driver xhci-dwc3 also adds the DM support which uses
compatible string "snps,dwc3". Thus, one USB node and its dwc3 subnode are both
binded as independent USB bus.

Since the xhci-imx8m driver uses xhci-dwc3 as low level driver, to fix the issue
we add -u-boot.dtsi files to change the USB node compatible string to
"simple-bus" and change dwc3 node compatibe string to "fsl, imx8mq-dwc3". Then
xhci-dwc3 DM driver won't bind any node.

Signed-off-by: Ye Li

Ye Li
2018-07-16 16:35:56 +0800

fsl-imx8mq-u-boot.dtsi 257 Bytes

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// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright 2018 NXP
  */

&usb3_0 {
	compatible = "simple-bus";
};

&usb_dwc3_0 {
	compatible = "fsl, imx8mq-dwc3";
};

&usb3_1 {
	compatible = "simple-bus";
};

&usb_dwc3_1 {
	compatible = "fsl, imx8mq-dwc3";
};