Re: [PATCH RFC] arm64: dts: qcom: qcs6490-rb3gen2: Enable uPD720201 and GL3590
From: Konrad Dybcio
Date: Mon Feb 16 2026 - 07:48:44 EST
On 2/12/26 9:43 PM, Bjorn Andersson wrote:
> The QCS6490 Rb3Gen2 has a Renesas μPD720201 XHCI controller hanging off
> the TC9563 PCIe switch, on this a Genesys Logic GL3590 USB hub provides
> two USB Type-A ports and an ASIX AX88179 USB 3.0 Gigabit Ethernet
> interface.
>
> The Renesas chip is powered by two regulators controlled through PM7250B
> GPIOs 1 and 4, and the power/reset pin is pulled down by PM8350C GPIO 4.
> The Genesys chip power is always-on, but the reset pin is controlled
> through TLMM GPIO 162.
>
> Describe the Renesas chip on the PCIe bus, with supplies and reset, to
> allow it to be brought out of reset and discovered. Then describe the
> two peers of the USB hub, with its reset GPIO, to allow this to be
> brought out of reset.
>
> The USB Type-A connectors are not described, as they are in no regard
> controlled by the operating system.
Nice, for a change ;)
[...]
> +
> + usb_hub_reset_state: usb-hub-reset-state {
> + pins = "gpio162";
> + function = "gpio";
> +
> + drive-strength = <2>;
> + bias-disable;
Straying away from the main topic, I find these newlines in the middle
excessive
Konrad