In legacy mode, DPTF on some systems may rely on MMIO to control PL1
settings. However, MSR PL1 also contributes to the decision of max
PL1 power; and in the current design, the lower value takes effect.
In order to align MMIO and MSR settings, a tdp_pl1_override option is
added to override the MSR PL1 limitation.
BRANCH=eve
BUG=b:73133864
TEST=1. Write PL1 override setting in devicetree.cb
2. Verify the MSR PL1 limitation is set correctly.
Change-Id: I35b8747ad3ee4c68c30d49a9436aa319360bab9b
Signed-off-by: Lucas Chen <lucas.chen@quanta.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/28079
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
There were so many pitfalls that I wrote my own version of this even-
tually. This version is inspired by the procedure of Alex Thiessen[1].
Instead of generating a `build.h` on demand, we always generate a tem-
porary version that, if it differs from the current one, is added as
a dependency.
As we use .SECONDEXPANSION on the prerequisites, special care is taken
that we won't generate the file twice. As it would be too late to add
the dependency if we'd run `genbuild_h.sh` inside a recipe, we have
to run it through the `$(shell)` function. But that brings us to the
next issue: The make variables used by `genbuild_h.sh` are not expor-
ted to this shell like they would be in a recipe. So we export them
manually. We could also make these variables explicit parameters of
`genbuild_h.sh` instead.
An alternative to always creating the temporary `build.h` would be
to add a phony target as dependency instead, and finally calling
`genbuild_h.sh` again in case we need an update. But, um, we create
so many files anyway...
[1] https://review.coreboot.org/25685
Change-Id: I311cf610eabae873c70f2985fc7a09acec8061f0
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/28197
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
ACPI 5.0 defines a method _CPC for "Continuous Performance Control" (CPPC).
Linux has a driver that enables features like speed shift without
consulting ACPI. Other OSes instead rely on this information and need a
_CPC present. Prior to this change performance in Win10 never exceeds
80% and MSR 0x770 is 0, while with this change (and enabling eist) higher
speeds can be achieved and the MSR value is now 1.
Change-Id: Ib7e0ae13f4b664b51e42f963e53c71f8832be062
Signed-off-by: Matt Delco <delco@chromium.org>
Reviewed-on: https://review.coreboot.org/27673
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
This change adds a method to init a cppc_config structure in a way that
should ideally work across Intel processors that support EIST.
Change-Id: Ib767df63d796bd1f21e36bcf575cf912e09090a1
Signed-off-by: Matt Delco <delco@chromium.org>
Reviewed-on: https://review.coreboot.org/28068
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
This patch moves uart functions which are common across multiple soc to
block/uart. This will remove redundant code copy from soc
{skylake/apollolake/cannonlake}.
BUG=b:78109109
BRANCH=none
TEST=Build and boot on KBL/APL/CNL platform.
Change-Id: I109d0e5c942e499cb763bde47cb7d53dfbf5cef6
Signed-off-by: Maulik V Vaghela <maulik.v.vaghela@intel.com>
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/26164
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
This is meant to solve an issue where the proximity sensor may fluctuate
between CLOSE / FAR in rapid succession upon the user removing their hand
from the unit, before settling on the correct output.
Using the hardware debouncing filter solves this issue and removes the
spurious fluctuations.
BRANCH=None
BUG=None
TEST=manual on Nocturne, observing events come in
Change-Id: I78cc4852d42fcda6209fedce1ce91236b5814571
Signed-off-by: Enrico Granata <egranata@chromium.org>
Reviewed-on: https://review.coreboot.org/28112
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
There are two SKUs of Whiskey Lake W0, 2-core and 4-core.
Change-Id: Ia9b2707568702a5fbae3e9495ca53df34613a542
Signed-off-by: Krzysztof Sywula <krzysztof.m.sywula@intel.com>
Reviewed-on: https://review.coreboot.org/28111
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>
When USB OTG is set, GLK FSP enables xHCI SW ID pin and configures
USB-C as device mode. Force USB-C into host mode.
BUG=b:111623911
TEST=Verified that USB-C being host mode once USB OTG is set.
Change-Id: Iaca3d25a1159f922b743963cbc508d8defa7b6ff
Signed-off-by: John Zhao <john.zhao@intel.com>
Reviewed-on: https://review.coreboot.org/27746
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
`superiotool` follows its own style (e.g. lot's of missing spaces
and odd placement of braces in the register descriptions).
Change-Id: Ifa33938a0fbac10577cbda10537f856f6f100233
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/28214
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Callers should have a default ready and get noticed by the return
value of get_option(). No need to scare log readers at this location.
Change-Id: Ied373d8a02afdc8d1017c9f41d9004e3797dfbb3
Signed-off-by: Stefan Tauner <stefan.tauner@gmx.at>
Reviewed-on: https://review.coreboot.org/28215
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
The DIMM type read from SPD needs to be converted to make sure SMBIOS fills
in the correct formfactor.
Tested on Lenovo T430: The Form Factor no longer reads as unknown.
Change-Id: Ia0211fa133f4ba9d60dfbd5f0dd45a43df68c030
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/28192
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Fill in SMBIOS type 17 DIMM serial number, read from SPD.
Fixes FWTS SMBIOS type 17 test.
Change-Id: Id6e818bfdf4af0fd34af56dc23df052a3f8c348d
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/28191
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
src/soc/intel/common/block/cpu/mp_init.c
Function init_cpus: Pointer dev checked for NULL may be
dereferenced.
src/soc/intel/common/block/graphics/graphics.c
Function graphics_get_bar: Pointer dev returned from
call may be NULL and will be dereferenced.
BRANCH=None
TEST=Built & booted Yorp board.
Change-Id: I5e7caa15a3911e05ff346d338493673af5318a51
Signed-off-by: John Zhao <john.zhao@intel.com>
Reviewed-on: https://review.coreboot.org/28060
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Make the code simpler and improve readability.
Change-Id: Ifa9308c32e4646c122254931b55fb83541a10a3c
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Reviewed-on: https://review.coreboot.org/28195
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
The help text is already very clear but some users (first and
foremost the author of this patch ;) are still selecting
USBDEBUG_DONGLE_BEAGLEBONE when using a BeagleBone Black and
waste hours on analyzing the debug output of EHCI debug driver.
Change-Id: Ibf002db7d81ed44878f3ce0324170e4b99e780a5
Signed-off-by: Stefan Tauner <stefan.tauner@gmx.at>
Reviewed-on: https://review.coreboot.org/28184
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Fix scope of ResourceSource, which should match the scope of the
device itself.
Change-Id: I9d0ff0ecc2721ec55b1ed12dddb495cd55966daf
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/28114
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
All different memory configuration should be supported by now.
Thanks to Igor Lee.
Change-Id: Ib93c0e3cbdc29cbf6cff26292df4fbbb8208082f
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Tested-by: Igor Lee <getrun@gmail.com>
Reviewed-on: https://review.coreboot.org/27781
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
The romstage main() entry point on arm64 boards is usually in mainboard
code, but there are a handful of lines that are always needed in there
and not really mainboard specific (or chipset specific). We keep arguing
every once in a while that this isn't ideal, so rather than arguing any
longer let's just fix it. This patch moves the main() function into arch
code with callbacks that the platform can hook into. (This approach can
probably be expanded onto other architectures, so when that happens this
file should move into src/lib.)
Tested on Cheza and Kevin. I think the approach is straight-forward
enough that we can take this without testing every board. (Note that in
a few cases, this delays some platform-specific calls until after
console_init() and exception_init()... since these functions don't
really take that long, especially if there is no serial console
configured, I don't expect this to cause any issues.)
Change-Id: I7503acafebabed00dfeedb00b1354a26c536f0fe
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/28199
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
In preparation to removing AmdLib, replace function LibAmdLocateImage()
with its ported version find_image().
BUG=b:112625809
TEST=Build and boot grunt.
Change-Id: I75ddd55f7e3e7f2cd7914f97c99b62690ae70660
Signed-off-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-on: https://review.coreboot.org/28164
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
In preparation to removing AmdLib, function LibAmdLocateImage() has to be
ported to be used by agesawrapper. The most important aspect of this porting
is that it has to obey coreboot format, specifically 8 character tab and 80
characters max. This required breaking the function in 2 (to solve
indentation) and rename some variables to shorter names.
One important aspect was breaking
(AMD_MODULE_HEADER*)(((AMD_IMAGE_HEADER *) CurrentPtr)->ModuleInfoOffset)
into:
image_ptr = (AMD_IMAGE_HEADER *) current_ptr;
if (validate_image((void *)image_ptr->ModuleInfoOffset,
and, within validate_image completed by:
AMD_MODULE_HEADER *mod_ptr = (AMD_MODULE_HEADER *)module_chain;
BUG=b:112625809
TEST=Build grunt, functionality tested in next commit.
Change-Id: I0d1e8b966cf7606fdb15a95de5771f835f07b2bc
Signed-off-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-on: https://review.coreboot.org/28144
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
Fix the following Error:
FAILED [LOW] AMLAsmASL_MSG_SERIALIZED_REQUIRED: Test 1, Assembler remark in line
142
Line | AML source
--------------------------------------------------------------------------------
00139|
00140| Scope (\_SB.PCI0.IGFX)
00141| {
00142| Method (_ROM, 2, NotSerialized) // _ROM: Read-Only Memory
| ^
| Remark 2120: Control Method should be made Serialized (due to creation of named objects within)
00143| {
00144| OperationRegion (ROMS, SystemMemory, 0xCD520000, 0xFE00)
00145| Field (ROMS, AnyAcc, NoLock, Preserve)
================================================================================
ADVICE: (for Remark #2120, ASL_MSG_SERIALIZED_REQUIRED): A named object is
created inside a non-serialized method - this method should be serialized. It is
possible that one thread enters the method and blocks and then a second thread
also executes the method, ending up in two attempts to create the object and
causing a failure.
Use the acpigen_write_method_serialized() to correct the error.
BUG=b:112476331
TEST=Run FWTS.
Change-Id: I145c3c3103efb4a02b4e02dd177f4bf50a2c7b3e
Signed-off-by: Marc Jones <marcj303@gmail.com>
Reviewed-on: https://review.coreboot.org/28124
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Fix the following FWTS error:
FAILED [MEDIUM] AMLAsmASL_MSG_RETURN_TYPES: Test 1, Assembler warning in line
3038
Line | AML source
--------------------------------------------------------------------------------
03035| Return (One)
03036| }
03037|
03038| Method (_Q09, 0, NotSerialized) // _Qxx: EC Query
| ^
| Warning 3115: Not all control paths return a value (_Q09)
03039| {
03040| If (Acquire (PATM, 0x03E8))
03041| {
================================================================================
ADVICE: (for Warning #3115, ASL_MSG_RETURN_TYPES): Some of the execution paths
do not return a value. All control paths that return must return a value
otherwise unexpected behaviour may occur. This error occurs because a branch on
an conditional op-code returns a value and another does not, which is
inconsistent behaviour.
_Q09 is a reserved method and can't return a value. Change the logic
so that no return is used and avoid this test error.
BUG=b:112476331
TEST=Run FWTS.
Change-Id: Ibbda1649ec2eb9cdf9966d4ec92bfd203bb78d07
Signed-off-by: Marc Jones <marcj303@gmail.com>
Reviewed-on: https://review.coreboot.org/28123
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Fix the following failure from FWTS:
FAILED [LOW] AMLAsmASL_MSG_SERIALIZED_REQUIRED: Test 1, Assembler remark in line
131
Line | AML source
--------------------------------------------------------------------------------
00128| }
00129| }
00130| })
00131| Method (_CRS, 0, NotSerialized) // _CRS: Current Resource Settings
| ^
| Remark 2120: Control Method should be made Serialized (due to creation of named objects within)
00132| {
00133| Name (RBUF, ResourceTemplate ()
00134| {
================================================================================
ADVICE: (for Remark #2120, ASL_MSG_SERIALIZED_REQUIRED): A named object is
created inside a non-serialized method - this method should be serialized. It is
possible that one thread enters the method and blocks and then a second thread
also executes the method, ending up in two attempts to create the object and
causing a failure.
BUG=b:112476331
TEST= Run FWTS.
Change-Id: I6f4f6e7e94b01f673afc97d9415481ee63e406e3
Signed-off-by: Marc Jones <marcj303@gmail.com>
Reviewed-on: https://review.coreboot.org/28122
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Fix the IASL build warnings:
Object is not referenced (Name [CDW2] is within a method [_OSC])
Object is not referenced (Name [CDW3] is within a method [_OSC])
Remove the not referenced objects. They are not needed.
BUG=b:112476331
TEST=IASL doesn't give the warning.
Change-Id: I5b38d4de3f9875c5b013a49eb5146bf5916b96a6
Signed-off-by: Marc Jones <marcj303@gmail.com>
Reviewed-on: https://review.coreboot.org/28121
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
This change adds some MSRs that are needed in a subsequent change to add
support for Continuous Performance Control.
Change-Id: Id4ecff1bc5eedaa90b41de526b9a2e61992ac296
Signed-off-by: Matt Delco <delco@chromium.org>
Reviewed-on: https://review.coreboot.org/28067
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
This change adds 2 methods for Conginuous Performance Control that was
added in ACPI 5.0 and expanded twice in later versions. One function
will create a global table based on a provided struct, while the other
function is used to add a _CPC method in each processor object.
Change-Id: I8798a4c72c681b960087ed65668f01b2ca77d2ce
Signed-off-by: Matt Delco <delco@chromium.org>
Reviewed-on: https://review.coreboot.org/28066
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
The existing code for modifying the power state after power loss of the system
only implemented the transitions from power off to either power on or power keep
properly.
Since I don't have a board with this chip, I couldn't test the patch on real
hardware. The two cases described above were tested before the original patch
was merged, so I'd expect this to work.
Change-Id: I3c26a2837e451dbfd3cee82e9beedc0f4a90af03
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/27648
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Martin Roth <martinroth@google.com>
Update SPD details to match with Coffeelake U RVP board
BUG=none
BRANCH=none
TEST=Boot on coffelake U rvp board and check if memory training is
passing and board boots till payload.
Change-Id: I953354cf5c6045731262f4f4e9da230187c2d246
Signed-off-by: Maulik V Vaghela <maulik.v.vaghela@intel.com>
Reviewed-on: https://review.coreboot.org/27906
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Subrata Banik <subrata.banik@intel.com>
Update GPIO table as per board schematics.
GPIO table for other variants will be added later.
Change-Id: Ieb55d160ae2d6bff940840b1fba9411979332d4d
Signed-off-by: Maulik V Vaghela <maulik.v.vaghela@intel.com>
Reviewed-on: https://review.coreboot.org/27907
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Naresh Solanki <naresh.solanki@intel.com>
Nami doesn't support wakeup from hibernation by CR50. This causes the
device to remain turned off after CR50 update.
This patch disables turning off EC on cr50 update. CR50 resets the
whole system. So, EC reset is not required.
Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
BUG=b:112604277
BRANCH=none
TEST=gsctool -a -u /media/removable/cr50.bin && reboot
Verify EC reboots. AP prints 'Waiting for CR50 reset to pick up update'
then reboots.
Change-Id: I06f5eb6100e8af6ffec45d4de2b40eff44f89709
Reviewed-on: https://review.coreboot.org/28113
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This patch allows boards to disable turning off EC on cr50 update.
If CR50 resets the whole system, an EC reset is not required.
BUG=b:112604277
BRANCH=none
TEST=gsctool -a -u /media/removable/cr50.bin && reboot
Verify EC reboots. AP prints 'Waiting for CR50 reset to pick up update'
then reboots.
Change-Id: I60a7aa50a549e7a5a1a114245fbf7b9646d813bb
Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-on: https://review.coreboot.org/28110
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
The only board left in the tree (aopen/dxplplusu) with
this socket is the slower of the mPGA604 variants with
FSB 533.
Change-Id: I04707a0dcb8f5b6235ead8c02ddfddfe7c3b8b1b
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/28116
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
This change permits the subsystem ID to be specified via Kconfig for the
devices on the SoC.
Some devices are getting zero'ed subsystem IDs because the unset (and thus
zero'ed) config options are overwriting the fsp defaults. With this change
the fsp defaults will only be overwritten by non-zero config values.
Change-Id: I0f7bb8e465f55e5dd6d8e0fad71b9b2a22f089dc
Signed-off-by: Matt Delco <delco@chromium.org>
Reviewed-on: https://review.coreboot.org/27609
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Header files AcpiLib.h, FchDef.h and FchBiosRamUsage.h became obsolete when
VENDORCODE_FULL_SUPPORT was removed. Therefor they should be removed.
BUG=b:112602580
TEST=Build grunt and gardenia.
Change-Id: If4fdb9ae1e106ba15f2a073f592499e638e40c65
Signed-off-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-on: https://review.coreboot.org/28093
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
These files are being updated to match the prevailing style
of cmos.default files.
Change-Id: I47d31d6fec8c9eb856aed0c63824d9556b7705e4
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/28051
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Martin Roth <martinroth@google.com>
The specification updates for ICH 9 & 10 require to leave the
register in its default state by reserving all of its bits.
Writing to it does not seem to make a difference anyway since
reading it afterwards does not reflect the write (tested on ICH10).
Therefore we should omit the writes but document this fact in the
code because it is easy to miss from the datasheet alone.
Change-Id: Iec0d79f926a826a80b90907f7861d0cb2ca30a5b
Signed-off-by: Stefan Tauner <stefan.tauner@gmx.at>
Reviewed-on: https://review.coreboot.org/28094
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Wei Shun Chang