Commit c9744843 authored Feb 25, 2022 by Maxime Ripard Committed by Stephen Boyd Mar 11, 2022

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>

parent c80ac50c

drivers/clk/clk_test.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -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);

include/linux/clk.h

+11 −0

Original line number	Diff line number	Diff line
		@@ -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.