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 diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
  14 index f13c3f4..0f6bcf5 100644
  15 --- a/drivers/clk/clk.c
  16 +++ b/drivers/clk/clk.c
  17 @@ -359,6 +359,19 @@ static struct clk_core *clk_core_get_parent_by_index(struct clk_core *core,
  18                 return core->parents[index];
  19  }
  20
  21 +struct clk *clk_get_parent_by_index(struct clk *clk, u8 index)
  22 +{
  23 +       struct clk_core *parent;
  24 +
  25 +       if (!clk)
  26 +               return NULL;
  27 +
  28 +       parent = clk_core_get_parent_by_index(clk->core, index);
  29 +
  30 +       return !parent ? NULL : parent->hw->clk;
  31 +}
  32 +EXPORT_SYMBOL_GPL(clk_get_parent_by_index);
  33 +
  34  struct clk_hw *
  35  clk_hw_get_parent_by_index(const struct clk_hw *hw, unsigned int index)
  36  {
  37 @@ -2033,6 +2046,12 @@ static const struct file_operations clk_summary_fops = {
  38         .release        = single_release,
  39  };
  40
  41 +unsigned int clk_get_num_parents(struct clk *clk)
  42 +{
  43 +       return !clk ? 0 : clk->core->num_parents;
  44 +}
  45 +EXPORT_SYMBOL_GPL(clk_get_num_parents);
  46 +
  47  static void clk_dump_one(struct seq_file *s, struct clk_core *c, int level)
  48  {
  49         if (!c)
  50 diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
  51 index 7cd0171..77dfd61 100644
  52 --- a/include/linux/clk-provider.h
  53 +++ b/include/linux/clk-provider.h
  54 @@ -650,6 +650,7 @@ unsigned int clk_hw_get_num_parents(const struct clk_hw *hw);
  55  struct clk_hw *clk_hw_get_parent(const struct clk_hw *hw);
  56  struct clk_hw *clk_hw_get_parent_by_index(const struct clk_hw *hw,
  57                                           unsigned int index);
  58 +struct clk *clk_get_parent_by_index(struct clk *clk, u8 index);
  59  unsigned int __clk_get_enable_count(struct clk *clk);
  60  unsigned long clk_hw_get_rate(const struct clk_hw *hw);
  61  unsigned long __clk_get_flags(struct clk *clk);
  62 diff --git a/include/linux/clk.h b/include/linux/clk.h
  63 index 0df4a51..1df90e3 100644
  64 --- a/include/linux/clk.h
  65 +++ b/include/linux/clk.h
  66 @@ -392,6 +392,15 @@ int clk_set_parent(struct clk *clk, struct clk *parent);
  67  struct clk *clk_get_parent(struct clk *clk);
  68
  69  /**
  70 + * clk_get_num_parents - get number of possible parents
  71 + * @clk: clock source
  72 + *
  73 + * Returns the number of possible parents of this clock,
  74 + * which can then be enumerated using clk_get_parent_by_index().
  75 + */
  76 +unsigned int clk_get_num_parents(struct clk *clk);
  77 +
  78 +/**
  79   * clk_get_sys - get a clock based upon the device name
  80   * @dev_id: device name
  81   * @con_id: connection ID
  82 --
  83 1.7.9.5
  84