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647d50a0c3
Only disable I2C clock 25 ms after not being used. The current implementation enables and disables the I2C clock for each I2C transaction. Each enable/disable call requires two verb transactions. This means each I2C transaction requires a total of four verb transactions to enable and disable the clock. However, if there are multiple consecutive I2C transactions, it is not necessary to enable and disable the clock each time, instead it is more efficient to enable the clock for the first transaction, and disable it after the final transaction, which would improve performance. This is achieved by using a timeout which disables the clock if no request to enable the clock has occurred for 25 ms. Signed-off-by: Lucas Tanure <tanureal@opensource.cirrus.com> Signed-off-by: Vitaly Rodionov <vitalyr@opensource.cirrus.com> Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com> Link: https://lore.kernel.org/r/20210811185654.6837-14-vitalyr@opensource.cirrus.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
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.