i2c: core: Provide generic definitions for bus frequencies

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There are few maximum bus frequencies being used in the I²C core code.
Provide generic definitions for bus frequencies and use them in the core.

The drivers may use predefined constants where it is appropriate.
Some of them are already using these under slightly different names.
We will convert them later to use newly introduced defines.

Note, the name of modes are chosen to follow well established naming
scheme [1].

These definitions will also help to avoid typos in the numbers that
may lead to subtle errors.

[1]: https://en.wikipedia.org/wiki/I%C2%B2C#Differences_between_modes

Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

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Andy Shevchenko 2020-03-24 14:32:11 +02:00 • committed by Wolfram Sang

parent e7c69fd3cc

commit e6282fc6f8

3 changed files with 13 additions and 5 deletions

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drivers/i2c/i2c-core-acpi.c

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drivers/i2c/i2c-core-base.c

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include/linux/i2c.h

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