On 2.12.2024 2:41 PM, Dzmitry Sankouski wrote:
> сб, 26 окт. 2024 г. в 13:41, Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx>:
>>
>> On 8.10.2024 6:51 PM, Dzmitry Sankouski wrote:
>>> Usb regulator was wrongly pointed to vreg_l1a_0p875.
>>> However, on starqltechn it's powered from vreg_l5a_0p8.
>>>
>>> Fixes: d711b22eee55 ("arm64: dts: qcom: starqltechn: add initial device tree for starqltechn")
>>> Signed-off-by: Dzmitry Sankouski <dsankouski@xxxxxxxxx>
>>>
>>> ---
>>
>> I really really doubt that the supplies for on-SoC PHYs were altered,
>> given these regulators are assigned based on their specific characteristics
>>
>
> From rooted android system from klabit87 on starqltechn:
>
> ```
> starqltechn:/ # cat /proc/cpuinfo | grep Hardware
> Hardware : Qualcomm Technologies, Inc SDM845
> starqltechn:/ # uname -a
> Linux localhost 4.9.186-klabitV6.5 #1 SMP PREEMPT Thu Dec 10 19:42:53
> CST 2020 aarch64
> starqltechn:/ # cat
> /sys/kernel/debug/regulator/soc:rpmh-regulator-ldoa1-pm8998_l1/consumers
> Device-Supply EN Min_uV Max_uV load_uA
> ae90000.qcom,dp_display-vdda-0p9 N 880000 880000 0
> 1d87000.ufsphy_mem-vdda-phy Y 880000 880000 62900
> ae96400.qcom,mdss_dsi_phy0-vdda-0p9 N 0 0 0
> ae94400.qcom,mdss_dsi_phy0-vdda-0p9 Y 880000 880000 36000
> 1c00000.qcom,pcie-vreg-0.9 Y 880000 880000 24000
> pm8998_l1 N 0 0 0
> starqltechn:/ # cat
> /sys/kernel/debug/regulator/soc:rpmh-regulator-ldoa5-pm8998_l5/consumers
> Device-Supply EN Min_uV Max_uV load_uA
> ae90000.qcom,dp_display-vdda-usb1-ss-core N 0 0 0
> 88e2000.qusb-vdd Y 800000 800000 0
> 88e8000.ssphy-vdd Y 800000 800000 0
> pm8998_l5 N 0 0 0
> ```
>
> I also downloaded kernel source from Samsung, to check its dts,
> and it also powers qusb@88e2000 and ssphy@88e8000 from 'pm8998_l5' regulator.
Interesting.. could you try to forcefully shut down L5A (I doubt you'll
be able to do so with L1A given it powers so much digital logic), or
set its regulator-min&max-microvolt to a way-too-low voltage (vmin
seems to be 312000)?
You should then be able to tell fairly easily, depending on whether usb2
still works after a replug
Konrad
