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| Filename | Latest commit message | Latest commit date |
|---|---|---|
78df308089Adjust the documentation of the new SPI memory interface based driver to reflect the new drivers settings. The "old" driver was using the "fsl,qspi-has-second-chip" property to select one of two dual chip setups (two chips on one bus or two chips on separate buses). And it used the order in which the subnodes are defined in the dt to select the CS, the chip is connected to. Both methods are wrong and in fact the "reg" property should be used to determine which bus and CS a chip is connected to. This also enables us to use different setups than just single chip, or symmetric dual chip. So the porting of the driver from the MTD to the SPI framework actually enforces the use of the "reg" properties and makes "fsl,qspi-has-second-chip" superfluous. As all boards that have "fsl,qspi-has-second-chip" set, also have correct "reg" properties, the removal of this property shouldn't lead to any incompatibilities. The only compatibility issues I can see are with imx6sx-sdb.dts and imx6sx-sdb-reva.dts, which have their reg properties set incorrectly (see explanation here: [2]), all other boards should stay compatible. Also the "big-endian" flag was removed, as this setting is now selected by the driver, depending on which SoC is in use. [2] https://patchwork.ozlabs.org/patch/922817/#1925445 Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org> |
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| README | ||
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.