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 --- drivers/clk/clk_test.c | 4 ++-- 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 60c206d1bcb0..490d364642b6 100644 --- a/drivers/clk/clk_test.c +++ b/drivers/clk/clk_test.c @@ -640,7 +640,7 @@ 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); @@ -757,7 +757,7 @@ 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 @@ -986,6 +986,17 @@ static inline void clk_bulk_disable_unprepare(int num_clks, clk_bulk_unprepare(num_clks, 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.