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Recent changes to the Atheros at803x driver cause the approach taken here to stop working because 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. In particular, the phy tx (and rx) delays are updated again as per the 'phy-mode' *after* the code in here runs. Things worked before above 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. It appears the code in here tries to make device trees work that incorrectly specify "rgmii", but that can't work any more and it is imperative since above commits to have the phy-mode configured correctly in the device tree. I suspect there are a few imx7d based boards using the ar8031 phy and phy-mode = "rgmii", but given I don't know which ones exactly, I am not in a position to update the respective device trees. Hence this patch is simply removing the superfluous code from the imx7d initialisation. An alternative could be to add a warning instead, but that would penalize all boards that have been updated already. Signed-off-by: André Draszik <git@andred.net> CC: Russell King <linux@armlinux.org.uk> 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: Kate Stewart <kstewart@linuxfoundation.org> CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org> CC: Thomas Gleixner <tglx@linutronix.de> CC: Leonard Crestez <leonard.crestez@nxp.com> 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.