From c97448437847bd76116b3a077e44808e946bb1ae Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime@cerno.tech>
Date: Fri, 25 Feb 2022 15:35:29 +0100
Subject: [PATCH] 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>
---
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 8924a5ac56d83..48f95d1784c89 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 266e8de3cb515..39faa54efe887 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.
--
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