Date: Thu, 28 Nov 2019 16:50:42 +0200 From: Nick Kostirya <nikolay.kostirya@i11.co> To: Emmanuel Vadot <manu@bidouilliste.com> Cc: Nick Kostirya via freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: gpioiic FDT overlays for sun8i-h3 Message-ID: <20191128165042.71cbbfe4@thinkpad> In-Reply-To: <20191128062149.577be86eb7dc15ae5805f31a@bidouilliste.com> References: <20191128152901.39dbeb4d@thinkpad> <20191128062149.577be86eb7dc15ae5805f31a@bidouilliste.com>
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On Thu, 28 Nov 2019 06:21:49 +0100
Emmanuel Vadot <manu@bidouilliste.com> wrote:
> On Thu, 28 Nov 2019 15:29:01 +0200
> Nick Kostirya via freebsd-arm <freebsd-arm@freebsd.org> wrote:
>
> > Hello.
> > I want use gpioiic on Nanopi NEO with PA0 and PA2 pins.
> > Nanopi NEO will be master.
> > Help me, please, to write overlay.
...
>
> I've never tested gpioiic but it seems that it needs to be a child of
> the gpio controller as the busdev is get via device_get_parent. It also
> doesn't seems to use a 'gpios' property, only scl/sda pin number, which
> means that you can only use it on one gpio controller (i.e. you can't
> have scl on one gpio controller and sda on another).
>
> Try this but I haven't even compiled it :
>
> /dts-v1/;
> /plugin/;
>
> / {
> compatible = "allwinner,sun8i-h3";
> };
>
> &{/soc/pinctrl@1c20800} {
> gpioiic0 {
> compatible = "gpioiic";
> scl = <0>; /* GPIO pin 00 (PA0) */
> sda = <2>; /* GPIO pin 02 (PA2) */
>
> };
> };
>
> --
> Emmanuel Vadot <manu@bidouilliste.com>
# ofwdump -p /soc/pinctrl@1c20800/gpioiic0
Node 0x1ce4: gpioiic0
sda:
00 00 00 02
scl:
00 00 00 00
compatible:
67 70 69 6f 69 69 63 00
'gpioiic'
# kldstat | grep iic
2 1 0xc0cab000 50ac gpioiic.ko
3 2 0xc0cb1000 6248 iicbb.ko
But I do not see it in devinfo and /dev.
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