e0e3e0b7da
[ Upstream commit 439c7183e5b97952bba1747f5ffc4dea45a6a18b ] UARTs on TI SoCs prior to J7200 don't provide independent control over RX FIFO not empty interrupt (RHR_IT) and RX timeout interrupt. Starting with J7200 SoC, its possible to disable RHR_IT independent of RX timeout interrupt using bit 2 of IER2 register. So disable RHR_IT once RX DMA is started so as to avoid spurious interrupt being raised when data is in the RX FIFO but is yet to be drained by DMA (a known errata in older SoCs). Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> Link: https://lore.kernel.org/r/20201029051930.7097-1-vigneshr@ti.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@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.