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7e30e5c143
[ Upstream commit 6ef281daf020592c219fa91780abc381c6c20db5 ] The driver currently does manual register manipulation in multiple places to talk to a specific UART port. In order to talk to a specific UART port over SPI, the bits U1 and U0 of the register address can be set, as explained in the Command byte configuration section of the datasheet. Make this more elegant by creating regmaps for each UART port and setting the read_flag_mask and write_flag_mask accordingly. All communcations regarding global registers are done on UART port 0, so replace the global regmap entirely with the port 0 regmap. Also, remove the 0x1f masks from reg_writeable(), reg_volatile() and reg_precious() methods, since setting the U1 and U0 bits of the register address happens inside the regmap core now. Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Cosmin Tanislav <cosmin.tanislav@analog.com> Link: https://lore.kernel.org/r/20220605144659.4169853-3-demonsingur@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Stable-dep-of: b35f8dbbce81 ("serial: max310x: prevent infinite while() loop in port startup") Signed-off-by: Sasha Levin <sashal@kernel.org> |
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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.