mirror of
https://github.com/torvalds/linux.git
synced 2026-07-30 19:21:28 +02:00
Linux kernel source tree
a2e1ba275e
Despite supporting Auto MDI-X, it looks like Aquantia only supports swapping pair (1,2) with pair (3,6) like it used to be for MDI-X on 100MBit/s networks. When all 4 pairs are in use (for 1000MBit/s or faster) the link does not come up with pair order is not configured correctly, either using MDI_CFG pin or using the "PMA Receive Reserved Vendor Provisioning 1" register. Normally, the order of MDI pairs being either ABCD or DCBA is configured by pulling the MDI_CFG pin. However, some hardware designs require overriding the value configured by that bootstrap pin. The PHY allows doing that by setting a bit in "PMA Receive Reserved Vendor Provisioning 1" register which allows ignoring the state of the MDI_CFG pin and another bit configuring whether the order of MDI pairs should be normal (ABCD) or reverse (DCBA). Pair polarity is not affected and remains identical in both settings. Introduce property "marvell,mdi-cfg-order" which allows forcing either normal or reverse order of the MDI pairs from DT. If the property isn't present, the behavior is unchanged and MDI pair order configuration is untouched (ie. either the result of MDI_CFG pin pull-up/pull-down, or pair order override already configured by the bootloader before Linux is started). Forcing normal pair order is required on the Adtran SDG-8733A Wi-Fi 7 residential gateway. Signed-off-by: Daniel Golle <daniel@makrotopia.org> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Link: https://patch.msgid.link/9ed760ff87d5fc456f31e407ead548bbb754497d.1728058550.git.daniel@makrotopia.org Signed-off-by: Jakub Kicinski <kuba@kernel.org> |
||
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.