gpioiic FDT overlays for sun8i-h3

[Nick Kostirya]

From: Nick Kostirya <nikolay.kostirya at i11.co>
To: Milan Obuch <milan at obuch.sk>
Subject: Re: gpioiic FDT overlays for sun8i-h3
Date: Fri, 29 Nov 2019 15:53:05 +0200
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On Fri, 29 Nov 2019 14:43:16 +0100
Milan Obuch <milan at obuch.sk> wrote:

> On Fri, 29 Nov 2019 15:37:54 +0200
> Nick Kostirya via freebsd-arm <freebsd-arm at freebsd.org> wrote:
>   
> > On Thu, 28 Nov 2019 06:21:49 +0100
> > Emmanuel Vadot <manu at bidouilliste.com> wrote:
> >     
> > >  Try this but I haven't even compiled it :
> > > 
> > > /dts-v1/;
> > > /plugin/;
> > > 
> > > / {
> > >     compatible = "allwinner,sun8i-h3";
> > > };
> > > 
> > > &{/soc/pinctrl at 1c20800} {
> > >         gpioiic0 {
> > >             compatible    = "gpioiic";
> > >             scl = <0>; /*    GPIO pin 00 (PA0) */
> > >             sda = <2>; /*    GPIO pin 02 (PA2) */
> > > 
> > >     };
> > > };      
> > 
> > Maybe I must rebuild all u-boot with this overlay?
> > 
> > Because the overlay do not help when it is in /boot/dtb/overlays/ and
> > /boot/msdos/dtb/overlays/.
> >    
> 
> Did you add in /boot/loader.conf line like
> 
> fdt_overlays="gpioiic"  

Yes.
I have 
fdt_overlays="sun8i-h3-sid,sun8i-h3-ths,sun8i-h3-opp,sun8i-h3-gpio-iic0"

where sun8i-h3-gpio-iic0 if gpioiic overlay.

I see gpioiic in ofwdump -a output. 


> 
> (gpioiic is name of your module in /boot/dtb/overlays)? Overlays are
> processed by loader of ours (freeBSD), not u-boot, AFAIK...  

By the way why do we need /boot/msdos/dtb/overlays/?