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b4c7698dd9
Add a method to query the PHY's in-band capabilities for a PHY interface mode. Where the interface mode does not have in-band capability, or the PHY driver has not been updated to return this information, then phy_inband_caps() should return zero. Otherwise, PHY drivers will return a value consisting of the following flags: LINK_INBAND_DISABLE indicates that the hardware does not support in-band signalling, or can have in-band signalling configured via software to be disabled. LINK_INBAND_ENABLE indicates that the hardware will use in-band signalling, or can have in-band signalling configured via software to be enabled. LINK_INBAND_BYPASS indicates that the hardware has the ability to bypass in-band signalling when enabled after a timeout if the link partner does not respond to its in-band signalling. This reports the PHY capabilities for the particular interface mode, not the current configuration. Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Link: https://patch.msgid.link/E1tIUre-006ITz-KF@rmk-PC.armlinux.org.uk Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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.