spi: dw: Add support for an optional interface clock

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The Synopsys SSI 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>
Signed-off-by: Mark Brown <broonie@kernel.org>

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Phil Edworthy 2019-03-19 15:52:07 +00:00 • committed by Mark Brown

parent 2f324ac7cf

commit 560ee7e910

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drivers/spi/spi-dw-mmio.c

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