Re: [PATCH 3/3] riscv: dts: microchip: fix icicle kit's dr_mode

Heinrich Schuchardt
2022-06-08T12:22:06Z

On 6/7/22 15:22, Conor Dooley wrote:
> The usb on icicle kit is actually configured for otg, not host mode.
> Swap it over.

To my understanding both host mode and OTG mode could be supported by
the hardware.

Jumper J17 on
https://www.microsemi.com/images/10/MicrosoftTeams-image%201.png.
USB device mode selection - Open: USB client. Closed: USB host

Is OTG really the most important scenario for running the board? I
personally would prefer to run it in host mode to add more peripherals.

What is missing on the driver side to enable host mode?

Can we detect the 5 Volt jumper setting via GPIO?

Best regards

Heinrich

>
> Fixes: 528a5b1f2556 ("riscv: dts: microchip: add new peripherals to icicle kit device tree")
> Signed-off-by: Conor Dooley<conor.dooley@microchip.com>
> ---
> arch/riscv/boot/dts/microchip/mpfs-icicle-kit.dts | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/riscv/boot/dts/microchip/mpfs-icicle-kit.dts b/arch/riscv/boot/dts/microchip/mpfs-icicle-kit.dts
> index 044982a11df5..121b01c8784f 100644
> --- a/arch/riscv/boot/dts/microchip/mpfs-icicle-kit.dts
> +++ b/arch/riscv/boot/dts/microchip/mpfs-icicle-kit.dts
> @@ -158,5 +158,5 @@ &syscontroller {
>
> &usb {
> status = "okay";
> - dr_mode = "host";
> + dr_mode = "otg";
> };
> -- 2.36.1