mmc: sunxi: Add runtime_pm support

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So far, even if our card was not in use, we didn't shut down our MMC
controller, which meant that it was still active and clocking the bus.

While this obviously means that we could save some power there, it also
creates issues when it comes to EMC control since we'll have a perfect peak
at the card clock rate.

Let's implement runtime_pm with autosuspend so that we will shut down the
controller when it's not been in use for quite some time.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

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Maxime Ripard 2018-04-16 16:23:04 +02:00 • committed by Ulf Hansson

parent e27e1f3d04

commit 9a8e1e8cc2

1 changed files with 48 additions and 0 deletions

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drivers/mmc/host/sunxi-mmc.c

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