commit | cd906960df03aeed28134e58bbbefdd981eb8bd2 | [log] [tgz] |
---|---|---|
author | Werner Zeh <werner.zeh@siemens.com> | Thu Oct 20 15:57:42 2022 +0200 |
committer | Felix Held <felix-coreboot@felixheld.de> | Tue Oct 25 15:06:18 2022 +0000 |
tree | 1e521babda4c7f330f55f93b6312f8f19ab9a08f | |
parent | f61070e87c80e75793f755a544f6f2f5465a9cc8 [diff] |
soc/intel/elkhartlake: Fix incorrect divider for MDIO clock After some measurements it turned out that Elkhart Lake uses a higher CSR clock internally from which the MDIO clock is derived. In order to stay compliant with the specification, the MDIO clock needs to be lower than 2.5 MHz. Therefore, the divider needs to be 102 and not 62. This patch changes the define to match the new divider value and uses this new define at the appropriate place. Test=Measure the MDIO clock rate on mc_ehl2 which results in 2 MHz. Change-Id: Idf498c3547530dfa395f54488ef244e787062e34 Signed-off-by: Werner Zeh <werner.zeh@siemens.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/68669 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com> Reviewed-by: Frans Hendriks <fhendriks@eltan.com>
coreboot is a Free Software project aimed at replacing the proprietary BIOS (firmware) found in most computers. coreboot performs a little bit of hardware initialization and then executes additional boot logic, called a payload.
With the separation of hardware initialization and later boot logic, coreboot can scale from specialized applications that run directly firmware, run operating systems in flash, load custom bootloaders, or implement firmware standards, like PC BIOS services or UEFI. This allows for systems to only include the features necessary in the target application, reducing the amount of code and flash space required.
coreboot was formerly known as LinuxBIOS.
After the basic initialization of the hardware has been performed, any desired "payload" can be started by coreboot.
See https://www.coreboot.org/Payloads for a list of supported payloads.
coreboot supports a wide range of chipsets, devices, and mainboards.
For details please consult:
ANY_TOOLCHAIN
Kconfig option if you're feeling lucky (no support in this case).Optional:
make menuconfig
and make nconfig
)Please consult https://www.coreboot.org/Build_HOWTO for details.
If you want to test coreboot without any risks before you really decide to use it on your hardware, you can use the QEMU system emulator to run coreboot virtually in QEMU.
Please see https://www.coreboot.org/QEMU for details.
Further details on the project, a FAQ, many HOWTOs, news, development guidelines and more can be found on the coreboot website:
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coreboot is licensed under the terms of the GNU General Public License (GPL). Some files are licensed under the "GPL (version 2, or any later version)", and some files are licensed under the "GPL, version 2". For some parts, which were derived from other projects, other (GPL-compatible) licenses may apply. Please check the individual source files for details.
This makes the resulting coreboot images licensed under the GPL, version 2.