Re: [linux-sunxi] [PATCH v2 0/3] Add basic support for RTC on Allwinner H6 SoC

[OndÅej Jirman]

Hi,

On Sat, Aug 24, 2019 at 10:06:14AM +0200, Jernej Åkrabec wrote:
> Dne sobota, 24. avgust 2019 ob 10:04:24 CEST je Jernej Åkrabec napisal(a):
> > Hi!
> > 
> > Dne torek, 20. avgust 2019 ob 17:19:31 CEST je megous@xxxxxxxxxx napisal(a):
> > > From: Ondrej Jirman <megous@xxxxxxxxxx>
> > > 
> > > I went through the datasheets for H6 and H5, and compared the differences.
> > > RTCs are largely similar, but not entirely compatible. Incompatibilities
> > > are in details not yet implemented by the rtc driver though.
> > > 
> > > I also corrected the clock tree in H6 DTSI.
> > > 
> > > This patchset is necessary for implementing the WiFi/Bluetooth support
> > > on boards using H6 SoC.
> > > 
> > > There was some discussion previously of describing HOSC, DCXO and XO
> > > oscillators and clocks as part of RTC in DT, but I decided against it
> > > because it's not necessary, becuse information that would be provided
> > > as a part of DT can already be determined at runtime from RTC registers,
> > > so this woudn't add any value and would only introduce complications
> > > to the driver. See: https://patchwork.kernel.org/cover/10898083/
> > > 
> > > Please take a look.
> > > 
> > > 
> > > Thank you and regards,
> > > 
> > >   Ondrej Jirman
> > 
> > Sorry for a bit late test, but with your patches on Tanix TX6 box I get this
> > in dmesg:
> > 
> > [   17.431742] sun6i-rtc 7000000.rtc: Failed to set rtc time.
> > [   20.439742] sun6i-rtc 7000000.rtc: rtc is still busy.
> > [   21.435744] sun6i-rtc 7000000.rtc: rtc is still busy.
> > [   24.055741] sun6i-rtc 7000000.rtc: rtc is still busy.
> > [   24.439752] sun6i-rtc 7000000.rtc: rtc is still busy.
> > 
> > Last line is repeated non-stop.
> > 
> > Any idea what could be wrong?
> 
> Additional info - this is on kernel 5.2.6 with your patches applied.

Do you have schematics, or a FEX file for the board or any other info on how the
RTC is set up on that board?

Can you dump the RTC register range?

regards,
	o.

> Best regards,
> Jernej
> 
> 
> 
> 
> 
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