[PATCH v2 1/2] arm: dts: bcm283x: Allow UARTs to work before relocation

Simon Glass sjg at chromium.org
Thu May 14 15:49:35 CEST 2020

Hi Matthias,

On Thu, 14 May 2020 at 02:56, Matthias Brugger <mbrugger at suse.com> wrote:
> On 15/04/2020 21:59, Tom Rini wrote:
> > On Tue, Apr 14, 2020 at 08:23:10PM -0600, Simon Glass wrote:
> >> Hi,
> >>
> >> On Sun, 22 Mar 2020 at 21:16, Simon Glass <sjg at chromium.org> wrote:
> >>>
> >>> At present the pinctrl nodes are not enabled in pre-relocation U-Boot so
> >>> the UARTs do not correctly select the pinconfig to enable the UART pins.
> >>> Fix this so that the U-Boot banner is printed.
> >>>
> >>> This fixes serial output on rpi_3b_32b with the following config.txt
> >>> options:
> >>>
> >>>    enable_uart=1
> >>>    gpu_freq=250
> >>>
> >>> Signed-off-by: Simon Glass <sjg at chromium.org>
> >>> Fixes: 9821636b64 (bcm2835_pinctrl: Probe pre-reloc)
> >>> ---
> >>>
> >>> Changes in v2:
> >>> - Update commit message
> >>>
> >>>  arch/arm/dts/bcm283x-u-boot.dtsi | 8 ++++++++
> >>>  1 file changed, 8 insertions(+)
> >>
> >> Any thoughts on this series? At present all my lab tests fail.
> >
> > I don't know if the problem is my firmware is too old (and so works) or
> > your firmware is too old (and so fails) or if there's some
> > phase-of-the-moon problem.  So while I'd like to know _why_ my 3B is
> > fine and yours is not, we should just take this I suppose.
> >
> I agree with Tom, we should try to find out what's the problem. Do you know
> which version (e.g. git commit or which version of rasbian etc) of the RPi FW
> you are using? If not, can you provide me with the md5sum's so that I can try to
> reproduce this.

Yes, also put a link to it at

md5sum /media/rpi3_b_boot/*
9e6d4b16b76053392d2a0619a83e0862  /media/rpi3_b_boot/bcm2709-rpi-2-b.dtb
4acc2947ae6c228681bcb2f5dc944e22  /media/rpi3_b_boot/bcm2710-rpi-2-b.dtb
c41f6a4b6cad196a0682f2c900c43f20  /media/rpi3_b_boot/bcm2710-rpi-3-b.dtb
8b7952dc4b46015efc3afa32a846b2e5  /media/rpi3_b_boot/bcm2710-rpi-3-b-plus.dtb
4ac8deb1874c38697db02ee40cec49e1  /media/rpi3_b_boot/bcm2710-rpi-cm3.dtb
951de137ec43729c2fdb627e06932b05  /media/rpi3_b_boot/bcm2711-rpi-4-b.dtb
cf109cce99e2e5dc7698f0358070d449  /media/rpi3_b_boot/bootcode.bin
db16856cf351712423fab8baad803cce  /media/rpi3_b_boot/config.old
1fe66e87c7a7104110b399db8a93b746  /media/rpi3_b_boot/config.orig
1fe66e87c7a7104110b399db8a93b746  /media/rpi3_b_boot/config.txt
76eb905d83343d67957af61fbb8ca775  /media/rpi3_b_boot/config.txt~
md5sum: /media/rpi3_b_boot/EFI: Is a directory
1ebf06f40ff4b6b00af1ad961b2ed67a  /media/rpi3_b_boot/fixup4cd.dat
97a38853ecfe7725388e68b8fdcf119d  /media/rpi3_b_boot/fixup4.dat
9c7a11bc8484fc841f8738ef20c086d6  /media/rpi3_b_boot/fixup4db.dat
5315d39bb99f7bc6c19f1704ce3c356c  /media/rpi3_b_boot/fixup4x.dat
73e9049c81e9735c84a4bad8b35141eb  /media/rpi3_b_boot/fixup_cd.dat
9530c2f1f9b2a3e54776af0a34a62ecf  /media/rpi3_b_boot/fixup.dat
1ac2cd69abe26488c494d3b387e50ad3  /media/rpi3_b_boot/fixup_db.dat
1a701837aeb101c8212805c1ed9d6088  /media/rpi3_b_boot/fixup_x.dat
md5sum: /media/rpi3_b_boot/overlays: Is a directory
3e63383a9ccf7b91a0859f87111548ac  /media/rpi3_b_boot/rpi2-u-boot.bin
6c5fee58664a254fbf557e882b9eb4f8  /media/rpi3_b_boot/rpi3-u-boot.bin
47b2304cbdb4fe5518896c2bb610d59d  /media/rpi3_b_boot/rpi3-u-boot.bin.old
95a23183100d9979d34d0e07f766ac47  /media/rpi3_b_boot/rpi3-u-boot.bin.orig
d629e0c0274103f264dde957b2af3c27  /media/rpi3_b_boot/start4cd.elf
2368d21eab5e72db9e223c7b15aba75c  /media/rpi3_b_boot/start4db.elf
3822926e480806825d9f9cce3e494b8e  /media/rpi3_b_boot/start4.elf
3eb84d324d39ab018ef952594cb38778  /media/rpi3_b_boot/start4x.elf
41f5923ad1373b9b99f26086f991cbd8  /media/rpi3_b_boot/start_cd.elf
8e0addb0054ae9a58f82af020ec3871d  /media/rpi3_b_boot/start_db.elf
b91a980720ccad9dbfb5ad51ef04bda4  /media/rpi3_b_boot/start.elf
ad1e957d1d8fd7beeaa2d0b15f037008  /media/rpi3_b_boot/start_x.elf

cat /media/rpi3_b_boot/config.txt
# Raspberry Pi 2

# Raspberry Pi 3

# Raspberry Pi 4

# Default Fedora configs for all Raspberry Pi Revisions
# Enable UART
# Only enable UART if you're going to use it as it has speed implications
# Serial console is ttyS0 on RPi3 and ttyAMA0 on all other variants
# u-boot will auto detect serial and pass corrent options to kernel if enabled
# Speed details: https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=141195
enable_uart = 1

# Early boot delay in the hope monitors are initialised enough to provide EDID

# We need this to be 32Mb to support VCHI services and drivers which use them
# but this isn't used by mainline VC4 driver so reduce to lowest supported value
# You need to set this to at least 80 for using the camera

# Use eXtended firmware by default

# New option to allow the firmware to load upstream dtb
# Will allow things like camera, touchscreen etc to work OOTB

# HAT and DT overlays. Documentation at Raspberry Pi here:
# https://www.raspberrypi.org/documentation/configuration/device-tree.md
# Each dtoverlay line is an individual HAT/overlay, multiple lines allowed
# The dtoverlay=upstream must be present for Fedora kernels
# dtoverlay=rpi-sense

# Allow OS rather than firmware control CEC

# Without this sdram runs at 400mhz, instead of 450
# https://github.com/Hexxeh/rpi-firmware/issues/172

# Other options you can adjust for all Raspberry Pi Revisions
# https://www.raspberrypi.org/documentation/configuration/config-txt/README.md
# All options documented at http://elinux.org/RPiconfig
# for more options see http://elinux.org/RPi_config.txt


# --- added by elecro_pilft-setup
hdmi_cvt 800 480 60 6 0 0 0
# --- end elecro_pilft-setup


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