[coreboot-gerrit] Change in coreboot[master]: ec/kontron/kempld: add option to configure I2C frequency

[Maxim Polyakov (Code Review)]

Hello  Felix Singer, Lance Zhao, build bot (Jenkins), Nico Huber, Andrey Petrov, Angel Pons, Andrey Petrov, Werner Zeh,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/44476

to look at the new patch set (#15).

Change subject: ec/kontron/kempld: add option to configure I2C frequency
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ec/kontron/kempld: add option to configure I2C frequency

Allows to change the I2C bus frequency by overriding i2c_frequency
option from the board devicetree. Thus, the I2C controller can use
Fast-mode (Fm), with a bit rate up to 400 kbit/s and Fast-mode Plus
(Fm+), with a bit rate up to 1 Mbit/s [1].

Tested on Kontron mAL10 COMe module with T10-TNI carrierboard [2].

[1] I2C-bus specification and user manual, doc #UM10204, Rev. 6,
    4 April 2014.
[2] https://review.coreboot.org/c/coreboot/+/39133

Change-Id: If0eb477af10d00eb4f17f9c01209f170b746ad3d
Signed-off-by: Maxim Polyakov 
---
M src/ec/kontron/kempld/chip.h
M src/ec/kontron/kempld/kempld_i2c.c
2 files changed, 28 insertions(+), 6 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/76/44476/15