On Thu, Apr 27, 2023 at 11:58 AM Tim Harvey tharvey@gateworks.com wrote:
On Thu, Apr 27, 2023 at 11:52 AM Fabio Estevam festevam@gmail.com wrote:
Hi Tim,
On Thu, Apr 27, 2023 at 3:46 PM Tim Harvey tharvey@gateworks.com wrote:
Fabio,
Do you have another board to test with that uses both imx8mm usb host controllers? With your imx8mm dtsi sync added a simple 'usb start' hangs on my imx8mm-gw71xx board when the second controller is enabled: starting USB... Bus usb@32e40000: USB EHCI 1.00 Bus usb@32e50000:
No other imx8mm-based board here at the moment, sorry.
Without the imx8mm.dtsi sync patch, I was able to reproduce the hang after running "usb start && usb stop".
After the imx8mm.dtsi sync patch, I do not see the hang.
it's possible the dts sync is indeed needed to resolve the issue I'm seeing but something else is needed along with it for usbotg2.
I don't believe the imx8mm-evk even has proper USB support in general (which is probably why CMD_USB is not enabled). Only one port is enabled in the dt and If I connect a USB-C to host cable with device in it to that port a 'usb tree' does not even show the device enumerated.
Yes, in U-Boot there is no ptn5110 driver, so the imx8mm-evk is not complete.
just enable usbotg2 controller in dt for imx8mm-evk and you'll see the hang:
+&usbotg2 {
status = "okay";+};
u-boot=> usb start starting USB... Bus usb@32e40000: Bus usb@32e50000:
Tim
Fabio,
The patch series from Eugen Hristev which implements reference counting for regulators [1] resolves my issue here so I consider this thread closed.
Let's move the discussion regarding your dt sync to those threads.
Best Regards,
Tim [1] https://patchwork.ozlabs.org/project/uboot/list/?series=351536