a34e0353a6
Commit 87c614175bbf (spi: spi-imx: fix MX51_ECSPI_* macros when cs > 3) ensured that the argument passed to the macros was masked with &3, so that we no longer write outside the intended fields in the various control registers. When all chip selects are gpios, this works just fine. However, when a mix of native and gpio chip selects are in use, that masking is too naive. Say, for example, that SS0 is muxed as native chip select, and there is also a chip at 4 (obviously with a gpio cs). In that case, when accessing the latter chip, both the SS0 pin and the gpio pin will be asserted low. The fix for this is to use the ->unused_native_cs value as channel number for any spi device which uses a gpio as chip select. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Link: https://lore.kernel.org/r/20230602115731.708883-1-linux@rasmusvillemoes.dk Signed-off-by: Mark Brown <broonie@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.