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

[Thomas Petazzoni <thomas.petazzoni@free-electrons.com>]

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"

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.

Thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com