A unified imx6 kernel config, old WANDBOARD-* configs going away

[Tom Everett]

ok I figured out what the dtsi file is.   I've got a bootable image here:

http://files.khubla.com/freebsd-wandboard/FreeBSD-armv6-11.0-IMX6-r262666.img.gz

and the boot log is here

http://files.khubla.com/freebsd-wandboard/FreeBSD-armv6-11.0-IMX6-r262666.txt

I put the dtb file on the FAT partition and loaded it using uEnv.txt.




On Sat, Mar 1, 2014 at 6:01 PM, Tom Everett <tom at khubla.com> wrote:

> I'm looking at the crochet code, and I see in freebsd_install_fdt that
> both *.dtb and *.dts are supported. However on the source tree it's
> imx6.dtsi. What's the difference b/t a dts file and a dtsi file?
>
>
>
> On Sat, Mar 1, 2014 at 8:41 AM, Tim Kientzle <tim at kientzle.com> wrote:
>
>>
>> On Feb 28, 2014, at 5:42 AM, Ian Lepore <ian at freebsd.org> wrote:
>>
>> > I've added a new imx6 unified kernel config named IMX6.  It has no
>> > compiled-in fdt, and can boot all three flavors of Wandboard when u-boot
>> > and ubldr load a dtb file.  Folks should start using it and eventually
>> > the WANDBOARD* configs will go away when nobody needs them anymore.
>>
>> Nice!  Another step towards GENERIC ARM.
>>
>> > the .dtb file in your /boot/kernel or /boot/modules directory, and ubldr
>> > will load it from there, using the filename set in the u-boot env var
>> > fdt_file.
>>
>> Using a U-Boot env var to specify the FDT is a nice idea.
>>
>> > Unfortunately we can't do a single image that boots any wandboard,
>> > because u-boot itself has to be different for each board.  This is what
>> > my u-boot env looks like on each wandboard:
>> >
>> > => printenv
>> > baudrate=115200
>> > bootcmd=run ubnet
>> > bootdelay=1
>> > console=ttymxc0
>> > fdt_file=wandboard-dual.dtb
>> > loadaddr=11000000
>> > loaderdev=net
>> > ubmmc=fatload mmc 0 ${loadaddr} ubldr; bootelf
>> > ubnet=dhcp ${loadaddr} /wand/boot/ubldr;bootelf
>> >
>> > Environment size: 265/8188 bytes
>> >
>> > The only thing that differs per-board is the fdt_file setting, and the
>> > u-boot binary itself.
>>
>> If you could get to a single U-Boot binary, you might
>> be able to do what BeagleBone does:  The U-boot.env
>> script detects the board variation and conditionally
>> loads the correct DTB blob.
>>
>> Tim
>>
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>
>
>
> --
> A better world shall emerge based on faith and understanding  - Douglas
> MacArthur
>



-- 
A better world shall emerge based on faith and understanding  - Douglas
MacArthur