Hi Stephen, On 18 November 2014 at 21:40, Stephen Warren <swar...@wwwdotorg.org> wrote: > Detect the board revision early during boot, and print the decoded > model name. > > Eventually, this information can be used for tasks such as: > - Allowing/preventing USB device mode; some models have a USB device on- > board so only host mode makes sense. Others connect the SoC directly > to the USB connector, so device-mode might make sense. > - The on-board USB hub/Ethernet requires different GPIOs to enable it, > although luckily the default appears to be fine so far. > - The compute module contains an on-board eMMC device, so we could store > the environment there. Other models use an SD card and so don't support > saving the environment (unless we store it in a file on the FAT boot > partition...) > > Set $fdtfile based on this information. At present, the mainline Linux > kernel doesn't contain a separate DTB for most models, but I hope that > will change soon. > > Signed-off-by: Stephen Warren <swar...@wwwdotorg.org> > --- > I'm considering renaming rpi_b -> rpi in U-Boot since it supports many > models. Hopefully I can persuade U-Boot to load the environment from > different places at run-time, so we won't need different builds based > on whether the environment is in eMMC or not for example. > > arch/arm/include/asm/arch-bcm2835/mbox.h | 33 +++++++++ > board/raspberrypi/rpi_b/rpi_b.c | 122 > ++++++++++++++++++++++++++++++- > include/configs/rpi_b.h | 1 - > 3 files changed, 152 insertions(+), 4 deletions(-)
I tried this out. It worked OK for me except that it can't find the device tree file bcm2835-rpi-b-rev2.dtb. Oddly I can fatload it from /bcm2835-rpi-b-rev2.dtb but when I try from /syslinux/..//bcm2835-rpi-b-rev2.dtb it fails and cannot find the file. Reducing the filename length to 8 chars works. I wonder what year of my life FAT will stop plaguing me? Anyway this doesn't seem to be related to this patch, so: Reviewed-by: Simon Glass <s...@chromium.org> Tested-by: Simon Glass <s...@chromium.org> Regards, Simon _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
