[PATCH] rockchip: Enable usb gadget on Radxa ROCK 5C

[FUKAUMI Naoki]

Hi Arnaud,

Basically, the Type-A OTG port of the Radxa ROCK series is intended to 
be used in HOST mode (unless there is a HOST/DEVICE switch).

That is why the following patch series does not include Radxa ROCK 4, 
5A, and 5C.

https://patchwork.ozlabs.org/project/uboot/list/?series=443764

Best regards,

--
FUKAUMI Naoki
Radxa Computer (Shenzhen) Co., Ltd.

On 3/25/25 23:48, Arnaud Patard wrote:
> I was testing DFU and SPL DFU [1] on my rock 5c. To get it working,
> I had to set the usb_host0_xhci node to peripheral and maximum speed
> to high speed, as done for other rk3588 devices.
> 
> For DFU (and not SPL DFU), I had to set the "maximum-speed" property on the
> usbdp_phy0 node, otherwise it's failing:
> => dfu 0 ram 0
> rockchip_udphy phy at fed80000: cmn ana lcpll lock timeout
> rockchip_udphy phy at fed80000: failed to init usbdp combophy
> rockchip_udphy phy at fed80000: PHY: Failed to init phy at fed80000: -110.
> rockchip_udphy phy at fed80000: cmn ana lcpll lock timeout
> rockchip_udphy phy at fed80000: failed to init usbdp combophy
> rockchip_udphy phy at fed80000: PHY: Failed to init phy at fed80000: -110.
> No USB device found
> udc_device_get_by_index failed
> 
> The issue is that it's trying to configure the usb3 phy, which is not
> the one used for peripheral mode. I've not checked on other rk3588 devices
> if they would need a similar change.
> 
> [1] for SPL DFU, I've used the serie https://patchwork.ozlabs.org/project/uboot/list/?series=443761
> 
> Signed-off-by: Arnaud Patard <arnaud.patard at collabora.com>
> ---
>   arch/arm/dts/rk3588s-rock-5c-u-boot.dtsi | 12 ++++++++++++
>   1 file changed, 12 insertions(+)
> 
> diff --git a/arch/arm/dts/rk3588s-rock-5c-u-boot.dtsi b/arch/arm/dts/rk3588s-rock-5c-u-boot.dtsi
> index 1dc574c2f21..54b0f914010 100644
> --- a/arch/arm/dts/rk3588s-rock-5c-u-boot.dtsi
> +++ b/arch/arm/dts/rk3588s-rock-5c-u-boot.dtsi
> @@ -9,3 +9,15 @@
>   	cap-mmc-highspeed;
>   	mmc-hs200-1_8v;
>   };
> +
> +&usb_host0_xhci {
> +	bootph-pre-ram;
> +	bootph-some-ram;
> +	dr_mode = "peripheral";
> +	maximum-speed = "high-speed";
> +};
> +
> +&usbdp_phy0 {
> +	bootph-all;
> +	maximum-speed = "high-speed";
> +};