target/linux/layerscape/patches-4.4/8236-clk-add-API-of-clks.patch

   1 From df2373ca941741f3f66750241a048ad4e2ff2c91 Mon Sep 17 00:00:00 2001
   2 From: Zhao Qiang <qiang.zhao@nxp.com>
   3 Date: Thu, 24 Nov 2016 11:47:45 +0800
   4 Subject: [PATCH 236/238] clk: add API of clks
   5
   6 Signed-off-by: Zhao Qiang <qiang.zhao@nxp.com>
   7 ---
   8  drivers/clk/clk.c            |   19 +++++++++++++++++++
   9  include/linux/clk-provider.h |    1 +
  10  include/linux/clk.h          |    9 +++++++++
  11  3 files changed, 29 insertions(+)
  12
  13 --- a/drivers/clk/clk.c
  14 +++ b/drivers/clk/clk.c
  15 @@ -359,6 +359,19 @@ static struct clk_core *clk_core_get_par
  16                 return core->parents[index];
  17  }
  18
  19 +struct clk *clk_get_parent_by_index(struct clk *clk, u8 index)
  20 +{
  21 +       struct clk_core *parent;
  22 +
  23 +       if (!clk)
  24 +               return NULL;
  25 +
  26 +       parent = clk_core_get_parent_by_index(clk->core, index);
  27 +
  28 +       return !parent ? NULL : parent->hw->clk;
  29 +}
  30 +EXPORT_SYMBOL_GPL(clk_get_parent_by_index);
  31 +
  32  struct clk_hw *
  33  clk_hw_get_parent_by_index(const struct clk_hw *hw, unsigned int index)
  34  {
  35 @@ -2033,6 +2046,12 @@ static const struct file_operations clk_
  36         .release        = single_release,
  37  };
  38
  39 +unsigned int clk_get_num_parents(struct clk *clk)
  40 +{
  41 +       return !clk ? 0 : clk->core->num_parents;
  42 +}
  43 +EXPORT_SYMBOL_GPL(clk_get_num_parents);
  44 +
  45  static void clk_dump_one(struct seq_file *s, struct clk_core *c, int level)
  46  {
  47         if (!c)
  48 --- a/include/linux/clk-provider.h
  49 +++ b/include/linux/clk-provider.h
  50 @@ -656,6 +656,7 @@ unsigned int clk_hw_get_num_parents(cons
  51  struct clk_hw *clk_hw_get_parent(const struct clk_hw *hw);
  52  struct clk_hw *clk_hw_get_parent_by_index(const struct clk_hw *hw,
  53                                           unsigned int index);
  54 +struct clk *clk_get_parent_by_index(struct clk *clk, u8 index);
  55  unsigned int __clk_get_enable_count(struct clk *clk);
  56  unsigned long clk_hw_get_rate(const struct clk_hw *hw);
  57  unsigned long __clk_get_flags(struct clk *clk);
  58 --- a/include/linux/clk.h
  59 +++ b/include/linux/clk.h
  60 @@ -392,6 +392,15 @@ int clk_set_parent(struct clk *clk, stru
  61  struct clk *clk_get_parent(struct clk *clk);
  62
  63  /**
  64 + * clk_get_num_parents - get number of possible parents
  65 + * @clk: clock source
  66 + *
  67 + * Returns the number of possible parents of this clock,
  68 + * which can then be enumerated using clk_get_parent_by_index().
  69 + */
  70 +unsigned int clk_get_num_parents(struct clk *clk);
  71 +
  72 +/**
  73   * clk_get_sys - get a clock based upon the device name
  74   * @dev_id: device name
  75   * @con_id: connection ID