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

[Alexandre Belloni]

Hi,

On 06/08/2019 20:30:45+0200, OndÅej Jirman wrote:
> Maybe whether XO or DCXO is used also matters if you want to do some fine
> tunning of DCXO (control register has pletny of options), but that's probably
> better done in u-boot. And there's still no need to read HOSC source from DT.
> The driver can just check compatible, and if it is H6 and OSC_CLK_SRC_SEL is 1,
> it can do it's DCXO tunning, or whatever. But neither OS nor bootloader will
> be using this info to gate/disable the osciallator.
> 

It is actually useful to be able to tweak the crystal tuning at
runtime to be able to reduce clock drift and compare with a reliable
source (e.g. NTP).
I'm curious, what kind of options does this RTC have?

-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com