target/linux/bcm27xx/patches-5.15/950-0835-clk-Add-clk_drop_range.patch

   1 From 6e08e0fa4ba16546fdbb2cdcc4ee6483bd0a6956 Mon Sep 17 00:00:00 2001
   2 From: Maxime Ripard <maxime@cerno.tech>
   3 Date: Mon, 17 Jan 2022 16:43:52 +0100
   4 Subject: [PATCH] clk: Add clk_drop_range
   5
   6 In order to reset the range on a clock, we need to call
   7 clk_set_rate_range with a minimum of 0 and a maximum of ULONG_MAX. Since
   8 it's fairly inconvenient, let's introduce a clk_drop_range() function
   9 that will do just this.
  10
  11 Suggested-by: Stephen Boyd <sboyd@kernel.org>
  12 Signed-off-by: Maxime Ripard <maxime@cerno.tech>
  13 ---
  14  drivers/clk/clk_test.c |  4 ++--
  15  include/linux/clk.h    | 11 +++++++++++
  16  2 files changed, 13 insertions(+), 2 deletions(-)
  17
  18 --- a/drivers/clk/clk_test.c
  19 +++ b/drivers/clk/clk_test.c
  20 @@ -645,7 +645,7 @@ static void clk_range_test_multiple_set_
  21         KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1);
  22
  23         KUNIT_ASSERT_EQ(test,
  24 -                       clk_set_rate_range(user2, 0, ULONG_MAX),
  25 +                       clk_drop_range(user2),
  26                         0);
  27
  28         rate = clk_get_rate(clk);
  29 @@ -762,7 +762,7 @@ static void clk_range_test_multiple_set_
  30         KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2);
  31
  32         KUNIT_ASSERT_EQ(test,
  33 -                       clk_set_rate_range(user2, 0, ULONG_MAX),
  34 +                       clk_drop_range(user2),
  35                         0);
  36
  37         rate = clk_get_rate(clk);
  38 --- a/include/linux/clk.h
  39 +++ b/include/linux/clk.h
  40 @@ -987,6 +987,17 @@ static inline void clk_bulk_disable_unpr
  41  }
  42
  43  /**
  44 + * clk_drop_range - Reset any range set on that clock
  45 + * @clk: clock source
  46 + *
  47 + * Returns success (0) or negative errno.
  48 + */
  49 +static inline int clk_drop_range(struct clk *clk)
  50 +{
  51 +       return clk_set_rate_range(clk, 0, ULONG_MAX);
  52 +}
  53 +
  54 +/**
  55   * clk_get_optional - lookup and obtain a reference to an optional clock
  56   *                   producer.
  57   * @dev: device for clock "consumer"