> Am 02.01.2019 um 11:04 schrieb Guillaume Gardet <[email protected]>:
>
> Hi,
>
>> Le 07/12/2018 à 14:04, Alexander Graf a écrit :
>>
>>> Am 07.12.2018 um 13:34 schrieb Guillaume GARDET <[email protected]>:
>>>
>>>
>>> Hi,
>>>
>>> On my Chromebook ARM, hctosys does not wait that /dev/rtc0 appears and
>>> fails on rtc0 opening as it is not accessible at this point. See my dmesg:
>>> [ 7.026205] hctosys: unable to open rtc device (rtc0)
>>> [ 9.474121] max77686-rtc max77686-rtc: rtc core: registered max77686-rtc
>>> as rtc0
>>>
>>> The RTC appears 2.5 sec after hctosys failed. This is because i2c module is
>>> needed and is loaded at this time.
>>>
>>> Any idea how to fix/workaround that?
>> Are the drivers in the initrd? If not, maybe that helps.
>
>
> I added i2c driver to initrd, RTC driver is already built-in. But it does not
> help. The same problem appears earlier in the boot process.
>
> BTW, we should be able to get time via EFI, no? Not sure what is the u-boot
> support for this, though.
U-Boot does not implement RTC retreival via runtime services on any board
today. The i2c bus might for example be shared, or clocks are owned by Linux
instead.
In this particular case though, I still think we're just merely missing a
dependency in the initrd. Looks at lsmod of a fully booted system and try to
put those in.
Alex
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