Hi, we need to wait more time for getting USB hub out of reset to be able to do initialiation over i2c that's why use gpio-delay driver instead of changing waiting time in usb hub driver. Waiting time depends on gpio wiring on the board which is in some of our case going via SLG programmable device.
Thanks, Michal Michal Simek (3): gpio: Add GPIO delay driver xilinx: Enable GPIO delay driver on Kria platforms arm64: zynqmp: Wire gpio-delay driver for USB hub reset arch/arm/dts/zynqmp-sck-kd-g-revA.dtso | 13 ++- arch/arm/dts/zynqmp-sck-kr-g-revA.dtso | 16 ++- arch/arm/dts/zynqmp-sck-kr-g-revB.dtso | 16 ++- arch/arm/dts/zynqmp-sck-kv-g-revA.dtso | 13 ++- arch/arm/dts/zynqmp-sck-kv-g-revB.dtso | 11 +- configs/xilinx_zynqmp_kria_defconfig | 1 + drivers/gpio/Kconfig | 8 ++ drivers/gpio/Makefile | 1 + drivers/gpio/gpio-delay.c | 133 +++++++++++++++++++++++++ 9 files changed, 196 insertions(+), 16 deletions(-) create mode 100644 drivers/gpio/gpio-delay.c -- 2.43.0 base-commit: 1b94b48043bd77fcb837704cba4385e14a4a694e branch: debian-sent3
