i2c: designware: Get selected speed mode sda-hold-time via ACPI

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Sda-hold-time is an important parameter for tuning i2c to meet the
electrical specification especially for high speed. I2C with incorrect
sda-hold-time may cause lost arbitration error. Instead of loading all
speed mode settings, only selected speed mode settings are loaded.

Signed-off-by: Tan Chin Yew <chin.yew.tan@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

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chin.yew.tan@intel.com 2017-03-28 16:48:02 +08:00 • committed by Wolfram Sang

parent 2a03d49922

commit bd698d24b1

1 changed files with 22 additions and 9 deletions

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drivers/i2c/busses/i2c-designware-platdrv.c

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