iommu/exynos: Prepare clocks when needed, not in driver probe

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Make clock preparation together with clk_enable(). This way inactive
SYSMMU controllers will not keep clocks prepared all the time.
This change allows more fine graded power management in the future.
All the code assumes that clock management doesn't fail, so guard
clock_prepare_enable() it with BUG_ON().

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Marek Szyprowski 2016-05-23 11:30:09 +02:00 • committed by Joerg Roedel

parent 01324ab2c9

commit fecc49db88

1 changed files with 26 additions and 28 deletions

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drivers/iommu/exynos-iommu.c

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