Re: [PATCH 1/3] arm64: dts: qcom: acer-aspire1: Enable RTC

[Nikita Travkin]

Doug Anderson писал(а) 31.10.2023 02:55:
> Hi,
> 
> On Mon, Oct 30, 2023 at 2:47 PM Konrad Dybcio <konrad.dybcio@xxxxxxxxxx> wrote:
>>
>> On 27.10.2023 16:42, Nikita Travkin wrote:
>> > pm6150 has a read-only RTC that can be used to keep the time with some
>> > extra userspace tools. Enable it.
>> >
>> > Signed-off-by: Nikita Travkin <nikita@xxxxxxx>
>> > ---
>> Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
>>
>> kinda unsure why it'd ever be disabled
>>
>> Konrad
> 
> FWIW we don't use the PMIC RTC in Chrome boards. I can't quite
> remember why, but I _think_ that the power lines aren't hooked up to
> the PMIC to keep power on for the board's lowest power states.
> Instead we use the RTC that's on the EC (Embedded Controller).
> 

When it was submitted, I suggested to keep it disabled by default
because of the firmware mess qcom has - the rtc is set to
read-only and if one enables it on cros without allow-set-time;
and validating that qtiseclib doesn't block it too, it would
likely cause issues by taking devices back to 1970s :D

Nikita

> -Doug