[U-Boot] [PATCH] jetson-tk1: Set fdtfile environment variable

[Tom Rini]

On Wed, Apr 13, 2016 at 09:31:43AM -0600, Stephen Warren wrote:
> On 04/13/2016 06:55 AM, Andreas Färber wrote:
> >Am 13.04.2016 um 14:48 schrieb Andreas Färber:
> >>The 4.5.0 kernel cannot cope with U-Boot's internal device tree, and the
> >>distro boot commands are looking for $fdtfile, so provide it to avoid
> >>having users supply a dumb boot.scr doing a setenv fdtfile ...; boot,
> >>defeating the purpose of generic EFI boot.
> >>
> >>Cc: Stephen Warren <swarren at nvidia.com>
> >>Cc: Alexander Graf <agraf at suse.de>
> >>Signed-off-by: Andreas Färber <afaerber at suse.de>
> >>---
> >>  include/configs/jetson-tk1.h | 4 ++++
> >>  1 file changed, 4 insertions(+)
> >>
> >>diff --git a/include/configs/jetson-tk1.h b/include/configs/jetson-tk1.h
> >>index 59dbb20..82a4be4 100644
> >>--- a/include/configs/jetson-tk1.h
> >>+++ b/include/configs/jetson-tk1.h
> >>@@ -63,6 +63,10 @@
> >>  /* General networking support */
> >>  #define CONFIG_CMD_DHCP
> >>
> >>+#define BOARD_EXTRA_ENV_SETTINGS \
> >>+	"fdtfile=tegra124-jetson-tk1.dtb\0" \
> >>+	""
> >
> >Is there any more intelligent solution than doing this for each board?
> 
> Yes, the distro boot scripts shouldn't be using $fdtfile
> unconditionally since it's not guaranteed to be set. The model is
> that boot scripts determine the FDT filename, and $fdtfile is an
> optional override.
> 
> It looks like the hard-coded use of $fdtfile was added into the EFI
> path, which I didn't get to review, and which shouldn't be enabled
> by default but unfortunately is.

Bah.  But the good news is we haven't done a release with EFI stuff yet,
so we can fix it.

-- 
Tom
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