clk: add clock protection mechanism to clk core

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The patch adds clk_core_protect and clk_core_unprotect to the internal
CCF API. These functions allow to set a new constraint along the clock
tree to prevent any change, even indirect, which may result in rate
change or glitch.

Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Michael Turquette <mturquette@baylibre.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20171201215200.23523-7-jbrunet@baylibre.com

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Jerome Brunet 2017-12-01 22:51:56 +01:00 • committed by Michael Turquette

parent ca5e089a32

commit e55a839a7a

2 changed files with 113 additions and 7 deletions

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119

drivers/clk/clk.c

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1

include/linux/clk-provider.h

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