firstly, memtest86+ is currently not cross compiled and
relies on 64-bit headers (x86_64 only). a 32-bit distro
is unlikely to be able to build 64-bit binaries.
secondly: vboot throws a build error due to -Werror when
building on 32-bit hosts. we rely on vboot code to build
cbfstool, so turn off -Werror on vboot
that's all. 32-bit hosts are not recommended; it is assumed
that you are building on an x86_64 host. work will go into
the build system at a later date to make it more portable,
by cross compiling everything, but this should fix 32-bit
for now.
there are some x60/t60 users who still want to build roms,
so let's allow them that possibility.
Signed-off-by: Leah Rowe <leah@libreboot.org>
The E6400 uses a 100 MHz reference clock on DPLL_REF_SSCLK, whereas
libgfxinit assumed that the reference was always 96 MHz. The frequency
difference caused by a 100 MHz reference with PLL config values
calculated assuming a 96 MHz reference were not significant enough to
cause noticable issues with the more common 1280 x 800 panels, but are
enough to matter for the 1440 x 900 panels which use a higher pixel
clock. This only affected the pre-OS graphics environment provided by
libgfxinit, as Linux drivers would determine the reference clock
frequency based on data in the VBT.
Fix this by making the reference clock frequency in libgfxinit
configurable for GM45 based on a new coreboot Kconfig, which is set to
100 MHz for the E6400.
Signed-off-by: Nicholas Chin <nic.c3.14@gmail.com>
for single-tree project (e.g. flashprog):
config/submodule/PROJECT/MODNAME/patches
for multi-tree project (e.g. coreboot):
config/submodule/PROJECT/TREE/MODNAME/patches
MODNAME is e.g.:
3rdparty/vboot directory in coreboot: would become vboot
(the submodule codepath is filtered to up to the final slash)
another example:
submodire src dir 3rdparty/foo/bar
MODNAME would be "bar"
Add whatever patches you like to a given submodule.
An example patch is included in this commit.
Signed-off-by: Leah Rowe <leah@libreboot.org>
broadwell mrc is retained, because it's needed on 820 g2
it's no longer needed on haswell, because nri is stable. nri
is short for "native ram initialisation", and libreboot provides
this for: thinkpad t440p, thinkpad w541, dell optiplex 9020 mt,
and dell optiplex 9020 sff
remove, in line with libreboot's binary blob reduction policy
previous revisions, prior to the recent release, stated that
it would be retained for compatibility, but it's really not
right to retain it, because doing so violates libreboot's policy
the recent release excluded mrc-based rom images for haswell
machines, providing only those rom images that use the libre
raminit, while retaining support for mrc in the build system, so
that users could still run the lbmk inject script on older release
roms that use mrc
again: libreboot's binary blob reduction policy is very clear:
https://libreboot.org/news/policy.html
it is a policy that can be summarised, thus:
if a blob can be avoided, it must be avoided.
therefore, we will avoid the Haswell MRC raminit blob
Signed-off-by: Leah Rowe <leah@libreboot.org>
the release variable is all we need, turning a target on
or off for a given release.
the status checks were prone to bugs, and unnecessary; it
also broke certain benchmark scripts.
it's better to keep the lbmk logic simpler. board status
will be moved to the documentation instead.
Signed-off-by: Leah Rowe <leah@libreboot.org>
changes upstream, relative to the previous revision:
* e5f2e4c6 pciinit: don't misalign large BARs
* 731c88d5 stdvgaio: Only read/write one color palette entry at a time
* c5a361c0 stdvga: Add stdvga_set_vertical_size() helper function
* 22c91412 stdvga: Rename stdvga_get_vde() to stdvga_get_vertical_size()
* 549463db stdvga: Rename stdvga_set_scan_lines() to stdvga_set_character_height()
* c67914ac stdvga: Rename stdvga_set_text_block_specifier() to stdvga_set_font_location()
* aa94925d stdvga: Rework stdvga palette index paging interface functions
* 8de51a5a stdvga: Rename stdvga_toggle_intensity() to stdvga_set_palette_blinking()
* 96c7781f stdvga: Add comments to interface functions in stdvga.c
* 2996819f stdvga: Rename CGA palette functions
* 91368088 stdvgamodes: Improve naming of dac palette tables
* 70f43981 stdvgamodes: No need to store pelmask in vga_modes[]
* 1588fd14 vgasrc: Rename vgahw_get_linesize() to vgahw_minimum_linelength()
* d73e18bb vgasrc: Use curmode_g instead of vmode_g when mode is the current video mode
* 192e23b7 vbe: implement function 09h (get/set palette data)
* 3722c21d vgasrc: round up save/restore size
* 5d87ff25 vbe: Add VBE 2.0+ OemData field to struct vbe_info
* 163fd9f0 fix smbios blob length overflow
* 82faf1d5 Add LBA 64bit support for reads beyond 2TB.
* 3f082f38 Add AHCI Power ON + ICC_ACTIVE into port setup code
* 3ae88886 esp-scsi: terminate DMA transfer when ESP data transfer completes
* a6ed6b70 limit address space used for pci devices.
Signed-off-by: Leah Rowe <info@minifree.org>
I'm on a schedule here and don't have time to do the
release changelog before actually compiling the release.
I'm pushing the release changelog / news announcement
*while the release is building*. Therefore, the actual
release archive will contain Libreboot documentation, but
from the lbwww revision just before the release announcement.
(a changelog file is still generated from Git, and included
in releases)
Signed-off-by: Leah Rowe <leah@libreboot.org>
Angel Pons told me I should do it. See comments here:
https://review.coreboot.org/c/coreboot/+/81016
I see no harm in complying with the request. I'll merge
this into the main patch at a later date and try to
get this upstreamed.
Just a reminder: on Optiplex 9020 variants, Xorg locks up
under Linux when tested with a graphics card; disabling
IOMMU works around the issue. Intel graphics work just fine
with IOMMU turned on. Libreboot disables IOMMU by default,
on the 9020, so that users can install graphics cards easily.
I'm pretty sure this is the correct way to do it. The machine
still seems to boot, in this configuration.
Signed-off-by: Leah Rowe <leah@libreboot.org>
NRI is libre raminit
MRC is binary blob raminit
the libre raminit is stable enough now that it's default
the MRC-based targets will be removed in a future release
Signed-off-by: Leah Rowe <leah@libreboot.org>
i initially decided to say unstable, but the default
configuration is reliable; the only caveat is that if
you enable IOMMU, you must only be using intel graphics.
this is already documented in warn.txt files, and on
the website, so it's more than ok to call this stable.
i use one of these myself as my daily driver and it's
rock solid. i haven't had any problems with it. i also
sell these to people with libreboot. no problems.
mark it as stable, ready for a full release.
Signed-off-by: Leah Rowe <leah@libreboot.org>
nitrocaster boards are hard to find nowadays and i'm not
comfortable supporting the knockoff chinese gear; quality
varies greatly, and i can't know how reliable they are.
nitrocaster has been out of business so it's just not
viable to support this mod anymore. in fact, keeping the
eDP-based targets is a liability to libreboot.
regular x220/x230 (non-eDP-modded) are retained. the eDP
modkit from nitrocaster let you use eDP screens instead
of lvds, on thinkpad x220 and x230, letting you use
higher resolution screens.
older lbmk revs can still be used, if you happen to come
across one of these boards. i only recommend using the
official nitrocaster board, if youcan find one unused.
ymmv with the chinese gear. better just use an unmodded
x230 or get a different machine.
Signed-off-by: Leah Rowe <leah@libreboot.org>
angel pons said how to fix it. more info in the patch.
works perfectly. i still see that scancode in dmesg and i guess
i have to assign it to some function that sets software rfkill
hw rfkill is no longer set. it's unblocked, and i can use wifi.
just in time for the libreboot release.
Signed-off-by: Leah Rowe <leah@libreboot.org>
was reported broken on canoeboot 0.1, which uses 2021
coreboot. we use much newer coreboot now in libreboot, but
still, better be cautious. set to release=n.
i'll set status and remove release=n if it works on testing
Signed-off-by: Leah Rowe <leah@libreboot.org>
it should be marked unstable, though these machines
are basically reliable; they have certain missing features
and quirky behaviour so it's important not to over-sell it
mark it as unstable, on all of the dell latitudes
Signed-off-by: Leah Rowe <leah@libreboot.org>
set to release="n" for now until the eDP targets
are fixed.
the regular non-eDP targets are stable, and will be
released.
Signed-off-by: Leah Rowe <leah@libreboot.org>
some latitudes still used the old style for variables
in target.cfg, specifically arch="x86_64" - lbmk used to
then check that on a big if/else and translate it to the
correct target name for crossgcc, e.g. i386-elf, arm-eabi
now it just puts the arch directly, in a new variable:
xarch
change arch="x86_64" to xarch="i386-elf" in these files.
also remove a few obsolete variables. should build now.
Signed-off-by: Leah Rowe <leah@libreboot.org>
github is unreliable. i host these files myself.
coreboot uses intel.com again now in the latest revisions, and
intel broke it before. i'm going to start backing up the acpica
releases onto my rsync server from now on, and keep patching
coreboot to use my files.
Signed-off-by: Leah Rowe <leah@libreboot.org>
raminit has never been fully reliable on this board, and so
this board has never been stable. so, now that lbmk specifies
such status per board, mark these boards as such.
Signed-off-by: Leah Rowe <leah@libreboot.org>
export LBMK_VERSION_TYPE=x
x can be: stable, unstable
in target.cfg files, specify:
status=x
x can be: stable, unstable, broken, untested
if unset, lbmk defaults to "unknown"
if LBMK_VERSION_TYPE is set, no confirmation is asked
if the given target matches what's set (but what's set
in that environmental variable can only be stable or
unstable)
if LBMK_RELEASE="y", no confirmation is asked, unless
the target is something other than stable/unstable
"unstable" means it works, but has a few non-breaking
bugs, e.g. broken s3 on dell e6400
whereas, if raminit regularly fails or it is so absolutely
unreliable as to be unusable, then the board should be
declared "broken"
untested means: it has not been tested
With this change, it should now be easier to track whether
a given board is tested, in preparation for releases. When
working on trees/boards, status can be set for targets.
Also: in the board directory, you can add a "warn.txt" file
which will display a message. For example, if a board has a
particular quirk to watch out for, write that there. The message
will be printed during the build process, to stdout.
If status is anything *other* than stable, or it is unstable
but LBMK_VERSION_TYPE is not set to "unstable", and not building
a release, a confirmation is passed.
If the board is not specified as stable or unstable, during
a release build, the build is skipped and the ROM is not
provided in that release; this is in *addition* to
release="n" or release="y" that can be set in target.cfg,
which will skip the release build for that target if "n"
Signed-off-by: Leah Rowe <leah@libreboot.org>
On T60 with Libreboot 20231106 and the GRUB payload, a user
reported this error in GRUB when a battery was connected:
"alloc magic is broken at 0x7b1aedf0: 0"
This error disappears when a battery is not connected, or
when using Libreboot 20230625. The issue has persisted
through to LIbreboot 20240225 and after, and I believe the
issue will be somewhere in coreboot, not in GRUB itself.
For now, switch i945 laptops (X60, T60, Macbook2,1) back to
the February 2023 coreboot revision used in Libreboot 20230625.
A bisect can be done before the next Libreboot release, ETA
May 2024, if time permits. Otherwise, this revert should solve
the problem for now, at least so far as Libreboot is concerned.
The following coreboot patches have been backported:
commit 29030d0f3dad2ec6b86000dfe2c8e951ae80bf94
Author: Bill Xie <persmule@hardenedlinux.org>
Date: Sat Oct 7 01:32:51 2023 +0800
drivers/pc80/rtc/option.c: Stop resetting CMOS during s3 resume
Further patches from upstream:
commit 432e92688eca0e85cbaebca3232f65936b305a98
Author: Bill Xie <persmule@hardenedlinux.org>
Date: Fri Nov 3 12:34:01 2023 +0800
drivers/pc80/rtc/option.c: Reset only CMOS range covered by checksum
These patches fixed S3 on GM45 machines, though it will be useful on
the i945 machines aswell.
The reason I'm doing it this way it is because I don't have a battery
for my X60 or T60, and my T60 isn't in a very good state either,
so I can't reproduce the error myself yet.
Signed-off-by: Leah Rowe <leah@libreboot.org>
GRUB has not pushed many patches to master since the recent 2.12
release, but there are a number of interesting fixes.
libreboot is doing a release soon. bump to latest grub revision.
Some of the new patches in GRUB are interesting:
XFS fixes:
"fs/xfs: Handle non-continuous data blocks in directory extents"
68dd65cfdaad08b1f8ec01b84949b0bf88bc0d8c
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=2254370
Apparently, XFS could not boot in some reports, though this was
likely with BIOS or UEFI GRUB; no such reports were made to libreboot
"gfxmenu/view: Resolve false grub_errno disrupting boot process"
39c927df66c7ca62d97905d1385054ac9ce67209
"util/grub-fstest: Add a new command zfs-bootfs"
28c4405208cfb6e2cea737f6cbaf17e631bac6cd
The gnulib revision does not need to be updated at this time.
Signed-off-by: Leah Rowe <leah@libreboot.org>
i added mkukri's patch but didn't enable it. this was intentional.
this patch enables tpm by default, on all 9020 sff/mt targets.
most users probably won't need it, but enabling it won't hurt.
Signed-off-by: Leah Rowe <leah@libreboot.org>
at present, the inject scripts compress refcode in a way
that is not reproducible, so there's no way to verify
that the firmware is correct, via checksum verification,
when injecting vendor code on release images
the lack of reproducibility in recompression will have to be
addressed, but the issue is that lbmk does not provide its own
sources for compression utilities, instead opting to use the
system's own compression utility
so the solution might be for lbmk not to use the host's utility,
and compile its own, or insert the refcode uncompressed. for now,
simply disable the hp 820 g2 target in libreboot releases
this uses the same logic recently implemented for excluding
mrc-based haswell images in libreboot releases
Signed-off-by: Leah Rowe <leah@libreboot.org>
release="n" is set in target.cfg on haswell build targets
that use mrc.bin
script/update/release exports LBMK_RELEASE="y"
script/build/roms skips building a given target if release="n"
in target.cfg *and* LBMK_RELEASE="y"
you could also do the export yourself before running ./build roms,
for example:
export LBMK_RELEASE="y"
./build roms all
This would skip these ROM images. The native haswell raminit is
now stable enough in my testing, that I wish to delete the MRC-based
targets. This is in line with Libreboot's Binary Blob Reduction Policy,
which states: if a blob can be avoided, it should be avoided.
The problem is that users often run the inject script in *lbmk* from
Git, instead of from the src release archive. I forsee some users
running this on modern lbmk with older release images. If the mrc-based
target isn't there, the user may use an NRI-based target name, and
think it works; they will insert without MRC. I foresaw this ages
ago, which is why Caleb and I ensured that the script checks hashes,
and hashes are included in releases.
Therefore: for the time being, keep the MRC-based configs in lbmk
but do not include images for them in releases. This can be done
indefinitely, but I'll probably remove those configs entirely at
some point.
On the following boards, Libreboot now will *only* provide NRI-based
ROM images for the following machines:
* Dell OptiPlex 9020 SFF
* Dell OptiPlex 9020 MT
* Lenovo ThinkPad T440p
* Lenovo ThinkPad W541/W540
I now recommend exclusive use of NRI-based images, on Haswell
hardware. It's stable enough in my testing, and now supports S3.
Signed-off-by: Leah Rowe <leah@libreboot.org>
sff happened to work, but mt would not boot with the patch,
because it called die() on unknown chassis type, and the gpio
happened to have a bad value in the old patch, because it wasn't
reading the right gpio.
i tested the fix on the old patch, but then decided to use
mate's new patch because instead of calling die(), it simply
boots with fan control disabled (max fan speed in that case),
if this happens again.
mt and sff have both been tested with this new version of the
patch. both of them boot, and they both have proper fan control.
Signed-off-by: Leah Rowe <leah@libreboot.org>
a hangover from earlier days, but i still disable it. i forgot
to do so on this config, when updating the nri code. do it now.
Signed-off-by: Leah Rowe <leah@libreboot.org>
hell added a patch fixing S3 on haswell NRI, but it seems
you still need to set 8MB CBFS size as with the MRC
tested on a t440p. S3 now works on haswell NRI.
Signed-off-by: Leah Rowe <leah@libreboot.org>
the t440p/w541 configs were re-done from scratch, because
the coreboot revisions are nearly two years apart.
i also added corebootfb configs.
hell updated their patchset. this patchset uses the following patch:
https://review.coreboot.org/c/coreboot/+/81948/1
it uses this, along with parent patches in the haswell nri patch series
Signed-off-by: Leah Rowe <leah@libreboot.org>
see:
https://review.coreboot.org/c/coreboot/+/81529
what i've merged is patchset 4. i had to rebase it slightly,
because the libreboot version has the iommu toggle on cmos
configs, which are files that mate's patch also changes,
leading to merge conflict.
Signed-off-by: Leah Rowe <leah@libreboot.org>
the grub payload was previously disabled, because the libre
mrc code sets up xhci rather than ehci, and grub did not have
xhci support (not natively).
libreboot now has xhci support in the grub payload, so enable
grub on these configurations.
Signed-off-by: Leah Rowe <leah@libreboot.org>
broadwell mrc enables both igpu and dgpu to be enabled
at any given time. if the onboard (intel) gpu is set as
primary, the logic to disable it is not executed within
coreboot; instead, the igpu is used for vga decode.
on some t440p/w541 thinkpads, both an intel and nvidia
gpu are present. in this setup, the intel gpu must be
used for vga, and all output, but rendering can be
offloaded to the nvidia gpu (nvidia optimus).
optimus would never work on haswell mrc.bin, because it
always disables the igpu when a dgpu is present, so a hack
exists in coreboot that hides the dgpu from mrc, so that the
igpu remains enabled. broadwell mrc doesn't do this, so the
option to hide PEG devices has been disabled in these
configs.
the broadwell mrc has better peg device handling, and can
support 16gb modules on broadwell hardware; it may well
support these modules on haswell hardware too, though ddr3
sodimms are very hard to find (and expensive). (and currently
untested, with this patch)
Signed-off-by: Leah Rowe <leah@libreboot.org>
broadwell mrc has better peg handling and can support 16gb
modules on broadwell machines - the blob can be used on haswell
machines too, instead of haswell mrc, and it might support 16gb
modules on these machines (not yet tested, but using broadwell
mrc does at least boot as reliably as haswell mrc anyway)
one little quirk with haswell mrc is that it actually handles
vga decode, disabling the igpu entirely, when a dgpu is used.
the broadwell mrc enables both GPUs and does not handle vga
decoding, so we must handle this the usual way; my patch for
this was merged upstream and i'm also adding it to libreboot,
which currently uses an older coreboot revision. this is needed
for dgpu to work. see patch:
0040-nb-haswell-Disable-iGPU-when-dGPU-is-used.patch
broadwell mrc may also make dealing with nvidia optimus setups
more reliable, on laptops that have nvidia GPUs, but this patch
does not add bmrc configs for t440p/w541
NOTE: on t440p/w541 laptops with nvidia graphics, the video output
is wired to intel but rendering can be offloaded to nvidia. in this
setup, we want vga decode to be done on intel, so i've set these
configs to enable CONFIG_ONBOARD_VGA_IS_PRIMARY (set it to y)
Signed-off-by: Leah Rowe <leah@libreboot.org>
see:
https://github.com/9elements/grub/commits/xhci-module-upstreaming-squash_v4/
grub only supports xhci on bios/uefi targets, but not coreboot.
some newer machines don't have ps/2 controllers, and boot in a
way where ehci isn't available at startup; the controller can't
be used by ehci code, there must be xhci support.
the code is from Patrick Rudolph working on behalf of 9elements.
the code was also sent here for review:
https://lists.gnu.org/archive/html/grub-devel/2020-12/msg00111.html
however, upstream never merged these patches. libreboot will have
to maintain these from now on. the patches have been rebased for
use with grub 2.12.
Signed-off-by: Leah Rowe <leah@libreboot.org>
3rd sata slot (of 3) broken on 9020 sff, and the 3rd and 4th (of 4)
slots are broken on 9020 mt
this patch fixes them on both, so that all ports work properly
Signed-off-by: Leah Rowe <leah@libreboot.org>
Needed to make graphics cards work. Turn it on if you're using
only the Intel GPU.
With IOMMU *enabled*, graphics cards do not work reliably at all.
The cause still needs to be investigated, but the symptoms are
graphical corruption on the screen, and Xorg usually crashes.
In some cases (on some cards), TTYs can still be used; the payload
can still be used reliably, on a graphics card, but Xorg fails to
work properly.
This could be a bug in Linux drivers, instead of anything that
coreboot does (not yet tested in factory BIOS).
Leaving it off by default will ensure reliable operation on all
setups, whether an iGPU or dGPU is used.
Signed-off-by: Leah Rowe <leah@libreboot.org>
It is now possible to disable the IOMMU on Haswell
boards, by doing this on your ROM image:
./nvramtool -C libreboot.rom -w iommu=Disable
To enable it again, do this:
./nvramtool -C libreboot.rom -w iommu=Enable
If not specified, the default behaviour is *on*.
A follow-up patch will turn IOMMU *off* by default,
on Dell OptiPlex 9020 SFF/MT, by setting it as such
in cmos.default. This is to make graphics cards work
properly to work around a bug when it's turned on.
Leaving the IOMMU enabled is recommended, if it works.
It works in most cases, including on 9020 SFF/MT when
using the Intel GPU without a graphics card inserted.
Signed-off-by: Leah Rowe <leah@libreboot.org>
the current entry is fine, but it would then not support
other configs of different flash sizes, unless they are
explicitly defined.
Signed-off-by: Leah Rowe <leah@libreboot.org>
This is required by the Latitude E5530, which uses a Broadcom NIC
instead of the Intel ones. The original port was missing this file.
Signed-off-by: Nicholas Chin <nic.c3.14@gmail.com>
Iru Cai's port from Gerrit:
https://review.coreboot.org/c/coreboot/+/39398
Now with the proper MXM structure, which removes the 30 second POST
delay. Tested with i7-2670QM, Quadro 2000M and 32GB RAM.
Signed-off-by: Riku Viitanen <riku.viitanen@protonmail.com>
this merges the fix from:
https://codeberg.org/libreboot/pico-serprog/pulls/1
however, PRs are not to be sent there. riku merged it in
his repository, and i pulled it in the mirror hosted
on libreboot codeberg
Signed-off-by: Leah Rowe <leah@libreboot.org>
The OptiPlex 9020/7020 port was merged first and was numbered 31.
Increment the numbering of the Latitude patches to reflect this.
Signed-off-by: Nicholas Chin <nic.c3.14@gmail.com>
i enabled it but it's buggy according to comments on gerrit.
disable for now. dgpu didn't work anyway, even with it turned
off, when i had this tested.
Signed-off-by: Leah Rowe <leah@libreboot.org>
keep dell9020mt_12mb
dell9020mtvga_12mb doesn't actually work (was tried for
running a graphics card on its own, with no igpu init)
Signed-off-by: Leah Rowe <leah@libreboot.org>
this was done automatically by running:
./update trees -u coreboot
this has to be done when adding patches for now board ports,
because of the way lbmk and also coreboot's build systems work.
the configs just have to be re-generated to include a line
that says the entry for the newly added boards isn't set. look
at the diff of this commit as an example.
Signed-off-by: Leah Rowe <leah@libreboot.org>
on a dgpu setup, igpu was still in use, when tested
by a user. do separate roms that don't enable anything
vga in coreboot, relying instead only on seabios to
execute a vga rom. these roms will only work if you
have a graphics card.
Signed-off-by: Leah Rowe <info@minifree.org>
Specifically the MT versions. The SFF versions will
be added separately, in a later commit.
See: https://review.coreboot.org/c/coreboot/+/55232
This patch has been added, from patchset 31. It still
has some unresolved issues, on that patchset, but
it should boot. See commit message there.
Of note: I've enabled PCI REBAR, though it's unknown
whether it will work (some comments there about it though,
on that gerrit page).
I've also set CBFS size to 8MB, not the full size of
the BIOS region; this is required on the T440p which
uses the same mrc.bin file, to get S3 working.
TSEG stage cache disabled, as on other Haswell boards.
The setup: SeaBIOS-only as first payload, but with GRUB
enabled as secondary payload. The _grubonly setup has
been enabled here. This way, the config will work on
iGPU and dGPU setups without issue.
Signed-off-by: Leah Rowe <info@minifree.org>
coreboot gerrit patch 55232, patchset 31
the actual board will be enabled in a follow-up patch.
merging the patch on its own first is better practise,
to run ./update trees -u coreboot
this way, there won't be a revision that breaks builds,
due to the idiosyncratic nature of coreboot configuration.
Signed-off-by: Leah Rowe <info@minifree.org>
Riku introduced three new patches:
* Add support for multiple chip selects. This allows you to
control multiple chips from the same clip, on systems with
dual flash setups, at least theoretically.
* Enable pull-up on unused chip selects - pull them high so
that chips you connect that to are deactivated while flashing
the target chip. This could be used on thinkpad W541 for
instance, where miso/mosi have 0ohm between them via the two
flash ICs. You could pull the other chip select high.
* Documentation for the above, in the pico-serprog readme.
This goes in tandem with a patch from Riku, present in the
recently integrated flashprog project, namely:
commit ddb6d926783d4f9cbee04c7392718ed8f89daa0e
Author: Riku Viitanen <riku.viitanen@protonmail.com>
Date: Mon Jan 15 19:15:49 2024 +0200
serprog: Add support for multiple SPI chip selects
This functionality will therefore be present in the next
release of Libreboot.
Signed-off-by: Leah Rowe <leah@libreboot.org>
Leah Rowe