On 03/20/2016 12:06 AM, Stephen Warren wrote:
On 03/15/2016 08:36 PM, Stephen Warren wrote:
On 03/13/2016 07:16 PM, Eric Anholt wrote:
For Raspberry Pi, we had the input clock rate to the pl011 fixed in
the rpi.c file, but it may be changed by firmware due to user changes
to config.txt. Since the firmware always sets up the uart (default
115200 output unless the user changes it), we can just skip our own
uart init to simplify the boot process and more reliably get serial
output.
Tested-by: Stephen Warren <swar...@wwwdotorg.org>
# on RPi B+ and RPi 2
Sorry, I take this Tested-by back. With the latest firmware (which has
some modifications intended to initialize either the PL01x or the mini
UART depending on which the kernel will actually use), this patch causes
U-Boot not to boot at all. I'm pretty sure this is a FW bug (since even
without this patch the UART doesn't work, but U-Boot does at least boot
and can be used over HDMI/usbkbd), but I'd still prefer not to apply
this until the FW is working again and we can double-check everything.
Hopefully this will be resolved in
https://github.com/raspberrypi/firmware/issues/553 soon.
We can go ahead with this patch now; the FW behaviour has been accepted
as a bug, and fixed in a new FW release.
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
