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The following build warnings are seen when running: make dtbs_check DT_SCHEMA_FILES=fsl-imx-uart.yaml arch/arm64/boot/dts/freescale/imx8mm-venice-gw7903.dtb: serial@30860000: cts-gpios: False schema does not allow [[33, 3, 1]] From schema: Documentation/devicetree/bindings/serial/fsl-imx-uart.yaml arch/arm64/boot/dts/freescale/imx8mm-venice-gw7903.dtb: serial@30860000: rts-gpios: False schema does not allow [[33, 5, 1]] From schema: Documentation/devicetree/bindings/serial/fsl-imx-uart.yaml ... The imx8m Venice Gateworks boards do not expose the UART RTS and CTS as native UART pins, so 'uart-has-rtscts' should not be used. Using 'uart-has-rtscts' with 'rts-gpios' is an invalid combination detected by serial.yaml. Fix the problem by removing the incorrect 'uart-has-rtscts' property. Fixes:27c8f4ccc1("arm64: dts: imx8mm-venice-gw72xx-0x: add dt overlays for serial modes") Fixes:d9a9a7cf32("arm64: dts: imx8m{m,n}-venice-*: add missing uart-has-rtscts property to UARTs") Fixes:870f645b39("arm64: dts: imx8mp-venice-gw74xx: add WiFi/BT module support") Signed-off-by: Fabio Estevam <festevam@denx.de> Acked-by: Tim Harvey <tharvey@gateworks.com> 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.