[Buildroot] [PATCH 1/1] rpi0w: added support for Raspberry Pi Zero W

[Peter Seiderer <ps.report@gmx.net>]

Hello Thomas, Yves,

On Mon, 19 Jun 2017 22:27:53 +0200, Thomas Petazzoni <thomas.petazzoni@free-electrons.com> wrote:

> Hello,
> 
> On Sun, 18 Jun 2017 21:44:04 +0200, Yves Deweerdt wrote:
> > added a new config file for the Raspberry Pi Zero W
> > - added new folder for raspberrypi0w
> > - included the overlays in the genimage config
> > - add pi3-miniuart-bt overlay to the config
> > - add enable_uart to the config
> > 
> > Signed-off-by: Yves Deweerdt <yves.deweerdt.linux@gmail.com>
> 
> I am a bit confused: what do you need in this defconfig, that the
> existing raspberrypi0_defconfig doesn't provide?
> 
> Your proposed defconfig is using the exact same kernel version and list
> of Device Trees. The only differences are:
> 
> +BR2_PACKAGE_RPI_FIRMWARE_INSTALL_DTB_OVERLAYS=y
> 
> and:
> 
> +BR2_ROOTFS_POST_SCRIPT_ARGS="--add-pi3-miniuart-bt-overlay"
> 

And the additional genimage line:

+      "rpi-firmware/overlays",

And the 'enable_uart=1' in the config.txt (Is this really needed? For the Pi3 the
overlay solution is enough).

See [1], [2] and [3] for the old suggestion/discussion...

> Is this the motivation for this separate defconfig? Could the existing
> raspberrypi0_defconfig be extended to also work for your use case,
> while keeping compatibility for the RPi Zero ?
> 
> If not, we should remove the RPi Zero W support from
> raspberrypi0_defconfig, because otherwise things are pretty confusing.
> 

Regards,
Peter

[1] http://lists.busybox.net/pipermail/buildroot/2017-March/187206.html
[2] http://lists.busybox.net/pipermail/buildroot/2017-March/187377.html
[3] http://lists.busybox.net/pipermail/buildroot/2017-March/187403.html

> Thanks!
> 
> Thomas