Re: [PATCH v2] arm64: dts: qcom: qcs6490-rb3gen2: Enable uPD720201 and GL3590

[Krishna Kurapati <krishna.kurapati@oss.qualcomm.com>]

On 3/24/2026 3:07 PM, Konrad Dybcio wrote:
> On 3/24/26 3:32 AM, 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.
>>
>> Signed-off-by: Bjorn Andersson <bjorn.andersson@oss.qualcomm.com>
>> ---
>> Dependencies has now landed, so this provides USB Type-A and Ethernet
>> support (when renesas_usb_fw.mem) is present.
>>
>> Missing from the RFC/v1 description was the mentioning that unless I
>> pass "pcie_aspm=off" to the kernel, the Renesas controller fails with:
>>
>>    xhci-pci-renesas 0001:04:00.0: Abort failed to stop command ring: -110
> 
> +Mani another quirky piece of hw, perhaps?
> Maybe +Krishna has the datasheet. does the it talk about ASPM?
> 

For PCIe adding, Krishna Chaitanya to thread.