diff options
| author | Jerome Brunet <jbrunet@baylibre.com> | 2017-12-01 22:51:56 +0100 |
|---|---|---|
| committer | Michael Turquette <mturquette@baylibre.com> | 2017-12-19 16:17:49 -0800 |
| commit | e55a839a7a1c561b7d2fbd9cc50b7d40dd2b3361 (patch) | |
| tree | 44beaa04e9e9b6972241f9013f5824579a54a88e /include/linux/clk-provider.h | |
| parent | ca5e089a32c5ffba6c5101fdabdd6dea18041c34 (diff) | |
| download | lwn-e55a839a7a1c561b7d2fbd9cc50b7d40dd2b3361.tar.gz lwn-e55a839a7a1c561b7d2fbd9cc50b7d40dd2b3361.zip | |
clk: add clock protection mechanism to clk core
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
Diffstat (limited to 'include/linux/clk-provider.h')
| -rw-r--r-- | include/linux/clk-provider.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h index 7c925e6211f1..73ac87f34df9 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -744,6 +744,7 @@ unsigned long clk_hw_get_rate(const struct clk_hw *hw); unsigned long __clk_get_flags(struct clk *clk); unsigned long clk_hw_get_flags(const struct clk_hw *hw); bool clk_hw_is_prepared(const struct clk_hw *hw); +bool clk_hw_rate_is_protected(const struct clk_hw *hw); bool clk_hw_is_enabled(const struct clk_hw *hw); bool __clk_is_enabled(struct clk *clk); struct clk *__clk_lookup(const char *name); |