[Buildroot] [PATCH 1/1] lego: ev3: use mainline kernel

[David Lechner]

On 05/16/2017 03:56 PM, Peter Korsgaard wrote:
>>>>>> "David" == David Lechner <david at lechnology.com> writes:
>
>  > It is finally possible to boot LEGO MINDSTORMS EV3 from the mainline
>  > Linux kernel. This patch updates the defconfg to use the mainline kernel
>  > instead of the custom ev3dev kernel.
>
> Great, thanks!
>
>  >  .../patches/linux/0001-adc-device-tree-node.patch  | 56 ++++++++++++++
>  >  .../linux/0002-sound-device-tree-node.patch        | 85 ++++++++++++++++++++++
>
> I see these patches are already in mainline post-4.11, so that's great.
>
>> +++ b/board/lego/ev3/genimage.cfg
>  > @@ -19,7 +19,7 @@ image flash.bin {
>  >  		size = 320K
>  >  	}
>  >  	partition uimage {
>  > -		image = "uImage"
>  > +		image = "uImage.da850-lego-ev3"
>  >  		size = 3M
>  >  		offset = 0x50000
>  >  	}
>
> I guess this change isn't strictly needed because of the symlink, but
> OK.

The symlink is something that I meant to ask about but forgot. I made 
the symlink so that the file name in the FAT partition is correct when 
creating an SD card image. I was wondering if there might be a better 
way to rename the file using the genimage tool.

>
>> diff --git a/configs/lego_ev3_defconfig b/configs/lego_ev3_defconfig
>  > index 543a227..0996b8c 100644
>  > --- a/configs/lego_ev3_defconfig
>  > +++ b/configs/lego_ev3_defconfig
>  > @@ -2,22 +2,26 @@
>  >  BR2_arm=y
>  >  BR2_arm926t=y
>
>  > +# Build options
>  > +BR2_GLOBAL_PATCH_DIR="board/lego/ev3/patches"
>  > +
>  >  # system
>  >  BR2_TARGET_GENERIC_GETTY=y
>  >  BR2_TARGET_GENERIC_GETTY_PORT="ttyS1"
>  >  BR2_ROOTFS_POST_IMAGE_SCRIPT="board/lego/ev3/post-image.sh"
>  > -# Linux headers same as kernel, a 4.4 series
>  > -BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_4=y
>
> This shouldn't be dropped (after changing to 4.11) as the defconfig
> would otherwise break whenever 4.12 gets added.
>
> Committed to next with that fixed, thanks.
>
> I see you are still using a relatively old u-boot and ext3. Any reason
> to not use 2017.05 and ext4?
>


No reason. I will send another patch to update.