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Due to HW board design, FEC2 depend on FEC1's MII bus. But FEC1's PHY locates on adapter PHY board that may not connect with sabreauto board. And FEC1 depend on MAX732X to select 1.8v IO voltage, MAX732X chip is also installed on adapter board. In such case, MAX732X expander gpio chip is not registered, and pinctrl driver cannot detect the gpio chip and return deferred_probe, FEC1 driver also do defer probe and never has chance to get probed. so its MII bus is also not regisgered. Then FEC2 also cannot work without MII bus. To avoid FEC1 depends on MAX732X, move the output IO setting to max732x driver by setting the default value. Reviewed-by: Haibo Chen <haibo.chen@nxp.com> Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.