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The driver appears to write to BMCR_SPEED and BMCR_DUPLEX, fields which are read-only, since they are actually configured through the vendor-specific IF_MODE (0x14) register. But the reason we're writing back the read-only values of MII_BMCR is to alter these writable fields: BMCR_RESET BMCR_LOOPBACK BMCR_ANENABLE BMCR_PDOWN BMCR_ISOLATE BMCR_ANRESTART In particular, the only field which is really relevant to this driver is BMCR_ANENABLE. Clarify that intention by spelling it out, using phy_set_bits and phy_clear_bits. The driver also made a few writes to BMCR_RESET and BMCR_ANRESTART which are unnecessary and may temporarily disrupt the link to the PHY. Remove them. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| 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 Restructured Text 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.