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9846a4524a
Recent changes to the atheros at803x driver caused ethernet to stop working on this board. In particular commit6d4cd041f0("net: phy: at803x: disable delay only for RGMII mode") and commitcd28d1d6e5("net: phy: at803x: Disable phy delay for RGMII mode") fix the AR8031 driver to configure the phy's (RX/TX) delays as per the 'phy-mode' in the device tree. This now prevents ethernet from working on this board. It used to work before those commits, because the AR8031 comes out of reset with RX delay enabled, and the at803x driver didn't touch the delay configuration at all when "rgmii" mode was selected, and because arch/arm/mach-imx/mach-imx7d.c:ar8031_phy_fixup() unconditionally enables TX delay. Since above commits ar8031_phy_fixup() also has no effect anymore, and the end-result is that all delays are disabled in the phy, no ethernet. Update the device tree to restore functionality. Signed-off-by: André Draszik <git@andred.net> CC: Ilya Ledvich <ilya@compulab.co.il> CC: Igor Grinberg <grinberg@compulab.co.il> CC: Rob Herring <robh+dt@kernel.org> CC: Mark Rutland <mark.rutland@arm.com> CC: Shawn Guo <shawnguo@kernel.org> CC: Sascha Hauer <s.hauer@pengutronix.de> CC: Pengutronix Kernel Team <kernel@pengutronix.de> CC: Fabio Estevam <festevam@gmail.com> CC: NXP Linux Team <linux-imx@nxp.com> CC: devicetree@vger.kernel.org CC: linux-arm-kernel@lists.infradead.org Signed-off-by: Shawn Guo <shawnguo@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 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.