i2c: designware: Add i2c bus locking support

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Adds support for acquiring and releasing a hardware bus lock in the i2c
designware core transfer function. This is needed for i2c bus controllers
that are shared with but not controlled by the kernel.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

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David Box 2015-01-15 01:12:16 -08:00 • committed by Wolfram Sang

parent 72f0271576

commit c0601d285e

2 changed files with 32 additions and 0 deletions

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26

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

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6

drivers/i2c/busses/i2c-designware-core.h

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