i2c: designware: Add support for an interface clock

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The Synopsys I2C Controller has an interface clock, but most SoCs hide
this away. However, on some SoCs you need to explicitly enable the
interface clock in order to access the registers. Therefore, add
support for an optional interface clock.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Gareth Williams <gareth.williams.jx@renesas.com>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

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Phil Edworthy 2019-02-28 13:52:10 +00:00 • committed by Wolfram Sang

parent bdfdf4b2ba

commit c62ebb3d5f

3 changed files with 23 additions and 2 deletions

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18

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

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2

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

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5

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

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