Hi Adam, On Mon, Jan 17, 2022 at 9:21 PM Adam Ford <aford...@gmail.com> wrote: > > The imx8mm and imx8mn appear compatible with imx7d-usb > flags in the OTG driver. If the dr_mode is defined as > host or peripheral, the device appears to operate correctly, > however the auto host/peripheral detection results in an error. > > The solution isn't just adding checks for imx8mm and imx8mn to > the check for imx7, because the USB clock needs to be running > to read from the USBNC_PHY_STATUS_OFFSET register or it will hang. > > Marek requested that I not enable the clocks in ehci_usb_of_to_plat, > so I modified that function to return an unknown state if the > device tree does not explicitly state whether it is a host > or a peripheral. > > When the driver probes, it looks to see if it's in the unknown > state, and only then will it read the register to auto-detect. > > Signed-off-by: Adam Ford <aford...@gmail.com> > --- > V3: Keep ehci_usb_of_to_plat but add the ability to return > and unknown state instead of reading the register. > If the probe determines the states is unknown, it will > query the register after the clocks have been enabled. > Because of the slight behavior change, I removed any > review or tested tags.
Unfortunately, v3 breaks 'ums 0 mmc 0' on the imx7s-warp board. The eMMC is no longer mounted and the board hangs.
