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Andy Shevchenko e6282fc6f8 i2c: core: Provide generic definitions for bus frequencies

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>

2020-03-24 21:58:51 +01:00

algos

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157

2019-05-30 11:26:37 -07:00

busses

i2c: mxs: Use dma_request_chan() instead dma_request_slave_channel()

2020-03-22 17:22:07 +01:00

muxes

i2c: mux: pca954x: support property idle-state

2020-01-03 15:00:53 +01:00

i2c-boardinfo.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157