[PATCH v2 0/3] i.MX8MP: more USB3 glue layer feature support

Alexander Stein
2021-12-16T16:08:34Z

This patchset aims to support flags for e.g. over-current active low or port
permanantly attached which are provided in the USB3 glue layer.

There is already a glue layer driver dwc3-imx8mp, but unfortunately this driver
does not use the glue area at all, it only handles wakeup-support which is
done in the HSIO BLK_CTRL area (0x32f10100), accordingly the driver only uses
the hsio clock.

The driver which actually uses the USB3 glue area is phy-fsl-imx8mq-usb. As the
name indicates PHY is configured in the corresponding registers, which are part
of the USB3 glue layer.

This make is it unclear for me which driver should handle the required features
above.
dwc3-imx8mp, the glue layer driver, does not touch the glue area at all,
but the HSIO BLK_CTRL area.
phy-fsl-imx8mq-usb only touches the PHY registers in the glue layer.
Neither does map the USB3 control register from the glue layer.

Thanks for any feedback and best regards,
Alexander

Alexander Stein (3):
dt-bindings: phy: imx8mq-usb-phy: Add imx8mp specific flags
phy: fsl-imx8mq-usb: Add support for setting fsl specific flags
arm64: dts: imx8mp: Add memory for USB3 glue layer to usb3_phy nodes

.../bindings/phy/fsl,imx8mq-usb-phy.yaml | 52 +++++++++++++++-
arch/arm64/boot/dts/freescale/imx8mp.dtsi | 6 +-
drivers/phy/freescale/phy-fsl-imx8mq-usb.c | 61 +++++++++++++++++++
3 files changed, 116 insertions(+), 3 deletions(-)