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[ Upstream commit58adbfb3eb] The Rockchip PCIe controller DT binding clearly states that 'ep-gpios' is an optional property. And indeed there are boards that don't require it. Make the driver follow the binding by using devm_gpiod_get_optional() instead of devm_gpiod_get(). [bhelgaas: tidy whitespace] Link: https://lore.kernel.org/r/20210121162321.4538-2-wens@kernel.org Fixes:e77f847df5("PCI: rockchip: Add Rockchip PCIe controller support") Fixes:956cd99b35("PCI: rockchip: Separate common code from RC driver") Fixes:964bac9455("PCI: rockchip: Split out rockchip_pcie_parse_dt() to parse DT") Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Sasha Levin <sashal@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.