Re: [PATCH] arm64: dts: qcom: sc8280xp: correct usb phy power supply

[Konrad Dybcio]

On 5/20/26 9:45 AM, Jens Glathe wrote:
> On 18.05.26 14:08, Pengyu Luo wrote:
>> I think they might take the power sequence into account when they were
>> introducing the devices, vdda-phy(~0.9v) first and vdda-pll(1.2v)
>> later in the upstream while vdd(0.912v) first and core(1.2v) later in
>> the downstream. BTW, the DSDT is unreliable. On my platform, it
>> describes that several components are consuming several LDOs, but
>> these components work well with these LDOs manually disabled via rpmh.
>>
>> Best wishes,
>> Pengyu
>>
> Hmm looks like schematics would trump these speculations. Maybe wait until this can be confirmed.

My previous reply was wrong.

via CRD8280X schematics:

                USB0    USB1    USB2    USB3    USB4    USB5
HSPHY   0p9     L9D     L4B     L1B     L8D     [L10D   L10D]
HSPHY   1p8     L1C     L1C     [L1C    L1C]    [L8C    L8C]
HSPHY   3p1     L7D     L13C    [L7D    L7D]    [L2D    L2D]

SSPHY   0p9     L9D     L4B     L1B     L8D     N/A     N/A
SSPHY   1p2     L4D     L3B     L4D     L4D     N/A     N/A

USB0 - usb@a600000
USB1 - usb@a800000
USB2/3 - usb@a400000 ports 0/1
USB4/5 - usb@a400000 ports 2/3

Regulators in square brackets share a single input pin on the SoC

Konrad