58 lines
1.7 KiB
Diff
58 lines
1.7 KiB
Diff
From 6e08e0fa4ba16546fdbb2cdcc4ee6483bd0a6956 Mon Sep 17 00:00:00 2001
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From: Maxime Ripard <maxime@cerno.tech>
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Date: Mon, 17 Jan 2022 16:43:52 +0100
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Subject: [PATCH] clk: Add clk_drop_range
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In order to reset the range on a clock, we need to call
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clk_set_rate_range with a minimum of 0 and a maximum of ULONG_MAX. Since
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it's fairly inconvenient, let's introduce a clk_drop_range() function
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that will do just this.
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Suggested-by: Stephen Boyd <sboyd@kernel.org>
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Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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---
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drivers/clk/clk_test.c | 4 ++--
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include/linux/clk.h | 11 +++++++++++
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2 files changed, 13 insertions(+), 2 deletions(-)
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--- a/drivers/clk/clk_test.c
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+++ b/drivers/clk/clk_test.c
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@@ -645,7 +645,7 @@ static void clk_range_test_multiple_set_
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KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1);
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KUNIT_ASSERT_EQ(test,
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- clk_set_rate_range(user2, 0, ULONG_MAX),
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+ clk_drop_range(user2),
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0);
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rate = clk_get_rate(clk);
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@@ -762,7 +762,7 @@ static void clk_range_test_multiple_set_
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KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2);
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KUNIT_ASSERT_EQ(test,
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- clk_set_rate_range(user2, 0, ULONG_MAX),
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+ clk_drop_range(user2),
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0);
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rate = clk_get_rate(clk);
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--- a/include/linux/clk.h
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+++ b/include/linux/clk.h
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@@ -1096,6 +1096,17 @@ static inline void clk_bulk_disable_unpr
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}
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/**
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+ * clk_drop_range - Reset any range set on that clock
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+ * @clk: clock source
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+ *
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+ * Returns success (0) or negative errno.
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+ */
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+static inline int clk_drop_range(struct clk *clk)
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+{
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+ return clk_set_rate_range(clk, 0, ULONG_MAX);
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+}
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+
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+/**
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* clk_get_optional - lookup and obtain a reference to an optional clock
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* producer.
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* @dev: device for clock "consumer"
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