mmc: pwrseq_simple: Add optional reference clock support

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Some WLAN chips attached to a SDIO interface, need a reference clock.

Since this is very common, extend the prseq_simple driver to support
an optional clock that is enabled prior the card power up procedure.

Note: the external clock is optional. Thus an error is not returned
if the clock is not found.

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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Javier Martinez Canillas 2015-01-29 16:00:06 +01:00 • committed by Ulf Hansson

parent 3f656a168c

commit c13045b1e9

1 changed files with 36 additions and 2 deletions

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38

drivers/mmc/core/pwrseq_simple.c

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