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BCM2711-based Raspberry Pi boards (4B, CM4 and 400) multiplex the I2C0 controller over two sets of pins, GPIO0+1 and GPIO44+45. The former is exposed on the 40-pin header, while the latter is used for the CSI and DSI connectors. Add a pinctrl-based I2C bus multiplexer to bcm2711-rpi.dtsi to model this multiplexing. The two child buses are named i2c0_0 and i2c0_1. Note that if you modified the dts before to add devices to the i2c bus appearing on pins gpio0 + gpio1 (either directly in the dts or using an overlay), you have to put these into the i2c0_0 node introduced here now. Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Dave Stevenson <dave.stevenson@raspberrypi.com> Link: https://lore.kernel.org/r/20240402000424.4650-8-laurent.pinchart@ideasonboard.com Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
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 reStructuredText 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.