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Marek Vasut ad0c274805 serial: stm32: Add RS485 RTS GPIO control again 
While the STM32 does support RS485 drive-enable control within the
UART IP itself, some systems have the drive-enable line connected
to a pin which cannot be pinmuxed as RTS. Add support for toggling
the RTS GPIO line using the modem control GPIOs to provide at least
some sort of emulation.

Fixes: 7df5081cbf ("serial: stm32: Add RS485 RTS GPIO control")
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Manivannan Sadhasivam <mani@kernel.org>
Cc: Fabrice Gasnier <fabrice.gasnier@st.com>
Cc: linux-stm32@st-md-mailman.stormreply.com
Link: https://lore.kernel.org/r/20200831171045.205691-1-marex@denx.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-09-04 17:16:40 +02:00
arch Three interrupt related fixes for X86: 2020-08-30 12:01:23 -07:00
block
certs
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2020-08-30 15:53:44 -07:00
Documentation Linux 5.9-rc3 2020-08-31 07:19:25 +02:00
drivers serial: stm32: Add RS485 RTS GPIO control again 2020-09-04 17:16:40 +02:00
fs DFS SMB1 Fix 2020-08-30 11:38:21 -07:00
include Linux 5.9-rc3 2020-08-31 07:19:25 +02:00
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kernel Three interrupt related fixes for X86: 2020-08-30 12:01:23 -07:00
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MAINTAINERS Three interrupt related fixes for X86: 2020-08-30 12:01:23 -07:00
Makefile Linux 5.9-rc3 2020-08-30 16:01:54 -07:00
README

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.