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| author | Maxime Ripard <maxime@cerno.tech> | 2022-02-25 15:35:29 +0100 |
|---|---|---|
| committer | Stephen Boyd <sboyd@kernel.org> | 2022-03-11 19:15:03 -0800 |
| commit | c97448437847bd76116b3a077e44808e946bb1ae (patch) | |
| tree | ab81413331c8fc78080bb4c17b2a7d6c2c8bb3a0 | |
| parent | c80ac50cbb378a4029129a596251747386e3c8e9 (diff) | |
| download | lwn-c97448437847bd76116b3a077e44808e946bb1ae.tar.gz lwn-c97448437847bd76116b3a077e44808e946bb1ae.zip | |
clk: Add clk_drop_range
In order to reset the range on a clock, we need to call
clk_set_rate_range with a minimum of 0 and a maximum of ULONG_MAX. Since
it's fairly inconvenient, let's introduce a clk_drop_range() function
that will do just this.
Suggested-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20220225143534.405820-8-maxime@cerno.tech
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
| -rw-r--r-- | drivers/clk/clk_test.c | 4 | ||||
| -rw-r--r-- | include/linux/clk.h | 11 |
2 files changed, 13 insertions, 2 deletions
diff --git a/drivers/clk/clk_test.c b/drivers/clk/clk_test.c index 8924a5ac56d8..48f95d1784c8 100644 --- a/drivers/clk/clk_test.c +++ b/drivers/clk/clk_test.c @@ -645,7 +645,7 @@ static void clk_range_test_multiple_set_range_rate_maximized(struct kunit *test) KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1); KUNIT_ASSERT_EQ(test, - clk_set_rate_range(user2, 0, ULONG_MAX), + clk_drop_range(user2), 0); rate = clk_get_rate(clk); @@ -762,7 +762,7 @@ static void clk_range_test_multiple_set_range_rate_minimized(struct kunit *test) KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2); KUNIT_ASSERT_EQ(test, - clk_set_rate_range(user2, 0, ULONG_MAX), + clk_drop_range(user2), 0); rate = clk_get_rate(clk); diff --git a/include/linux/clk.h b/include/linux/clk.h index 266e8de3cb51..39faa54efe88 100644 --- a/include/linux/clk.h +++ b/include/linux/clk.h @@ -987,6 +987,17 @@ static inline void clk_bulk_disable_unprepare(int num_clks, } /** + * clk_drop_range - Reset any range set on that clock + * @clk: clock source + * + * Returns success (0) or negative errno. + */ +static inline int clk_drop_range(struct clk *clk) +{ + return clk_set_rate_range(clk, 0, ULONG_MAX); +} + +/** * clk_get_optional - lookup and obtain a reference to an optional clock * producer. * @dev: device for clock "consumer" |