c872e7ae05
The driver so far has always disabled CRC protection. This means any data corruption that occurrs during the SPI transfers could go undetected. This patch adds module parameters enable_crc7 and enable_crc16 to selectively turn on CRC7 (for command transfers) and CRC16 (for data transfers), respectively. The default configuration remains unchanged, with both CRC7 and CRC16 off. The performance impact of CRC was measured by running ttcp -t four times in a row on a SAMA5 device: CRC7 CRC16 Throughput: Standard deviation: ---- ----- ----------- ------------------- off off 1720 +/- 48 KB/s on off 1658 +/- 58 KB/s on on 1579 +/- 84 KB/s Signed-off-by: David Mosberger-Tang <davidm@egauge.net> Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Link: https://lore.kernel.org/r/20210227172818.1711071-4-davidm@egauge.net
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.