Date: Wed, 15 Aug 2018 00:04:36 +0200 From: Marek Zarychta <zarychtam@plan-b.pwste.edu.pl> To: Warner Losh <imp@bsdimp.com> Cc: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Re: 1-Wire and RPi2 Message-ID: <de8cd007-7981-26b7-e61d-8f2d103f61cd@plan-b.pwste.edu.pl> In-Reply-To: <CANCZdfr6SLWrReFQWo27tannLLFiOy2bWGg=qD1uUJTM_%2BrHbQ@mail.gmail.com> References: <1e34169b-a638-ca80-13f1-b96585483a76@plan-b.pwste.edu.pl> <CANCZdfr6SLWrReFQWo27tannLLFiOy2bWGg=qD1uUJTM_%2BrHbQ@mail.gmail.com>
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From: Marek Zarychta <zarychtam@plan-b.pwste.edu.pl>
To: Warner Losh <imp@bsdimp.com>
Cc: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org>
Message-ID: <de8cd007-7981-26b7-e61d-8f2d103f61cd@plan-b.pwste.edu.pl>
Subject: Re: 1-Wire and RPi2
References: <1e34169b-a638-ca80-13f1-b96585483a76@plan-b.pwste.edu.pl>
<CANCZdfr6SLWrReFQWo27tannLLFiOy2bWGg=qD1uUJTM_+rHbQ@mail.gmail.com>
In-Reply-To: <CANCZdfr6SLWrReFQWo27tannLLFiOy2bWGg=qD1uUJTM_+rHbQ@mail.gmail.com>
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W dniu 14.08.2018 o=C2=A021:15, Warner Losh pisze:
>
>
> On Tue, Aug 14, 2018 at 12:20 PM, Marek Zarychta
> <zarychtam@plan-b.pwste.edu.pl <mailto:zarychtam@plan-b.pwste.edu.pl>>
> wrote:
>
> I followed owc(4) man page, so added "onewire { ..." to rpi2.dts fi=
le.
> Then the kernel was recompiled and reinstalled. Also rpi2.dtb was
> recompiled using /usr/src/sys/tools/fdt/make_dtb.sh and reinstalled=
in
> /boot/msdos.
>
> The only significant change I can see is changed MAC address assign=
ed
> for ue0. The 1-Wire device is still missing and I want to find out
> what
> I am doing wrong.
>
> Is 1-Wire bus supported on RPi2 boards running FreeBSD 12.0-ALPHA1?=
>
>
> I'd expect it to work. I've not recently confirmed it working though.
>
> Warner
Thank you for this device driver and for the reply. Of course, it works,
I upgraded this box from 11-STABLE, but only partially upgraded boot
environment installed on /boot/msdos partition.
Currently (for FreeBSD 12.0-ALPHA1) getting ow_temp(4) working on
Raspberry Pi 2 is pretty straightforward. I couldn't resist posting a
simple tutorial, maybe some enthusiasts will benefit from it:
pkg install rpi-firmware
cp /usr/local/share/rpi-firmware/overlays/w1-gpio.dtbo /boot/msdos/overla=
ys/
echo 'dtoverlay=3Dw1-gpio' >>/boot/msdos/config.txt
echo 'ow_load=3D"yes"'=C2=A0 >>/boot/loader.conf
echo 'owc_load=3D"yes"' >>/boot/loader.conf
echo 'ow_temp_load=3D"yes"' >>/boot/loader.conf
After reboot:
#dmesg | grep -i wire
owc0: <FDT GPIO attached one-wire bus> at pin 4 on gpiobus0
ow0: <1 Wire Bus> on owc0
ow_temp0: <Advanced One Wire Temperature> romid 28:90:2d:e0:05:00:00:c7
on ow0
ow_temp1: <Advanced One Wire Temperature> romid 28:02:e6:84:05:00:00:d4
on ow0
ow_temp2: <Advanced One Wire Temperature> romid 28:9e:0a:a1:05:00:00:12
on ow0
ow_temp3: <Advanced One Wire Temperature> romid 28:db:82:85:05:00:00:07
on ow0
--=20
Marek Zarychta
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