drivers/clk/actions/owl-composite.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // OWL composite clock driver
   4 //
   5 // Copyright (c) 2014 Actions Semi Inc.
   6 // Author: David Liu <liuwei@actions-semi.com>
   7 //
   8 // Copyright (c) 2018 Linaro Ltd.
   9 // Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
  10
  11 #include <linux/clk-provider.h>
  12 #include <linux/regmap.h>
  13
  14 #include "owl-composite.h"
  15
  16 static u8 owl_comp_get_parent(struct clk_hw *hw)
  17 {
  18         struct owl_composite *comp = hw_to_owl_comp(hw);
  19
  20         return owl_mux_helper_get_parent(&comp->common, &comp->mux_hw);
  21 }
  22
  23 static int owl_comp_set_parent(struct clk_hw *hw, u8 index)
  24 {
  25         struct owl_composite *comp = hw_to_owl_comp(hw);
  26
  27         return owl_mux_helper_set_parent(&comp->common, &comp->mux_hw, index);
  28 }
  29
  30 static void owl_comp_disable(struct clk_hw *hw)
  31 {
  32         struct owl_composite *comp = hw_to_owl_comp(hw);
  33         struct owl_clk_common *common = &comp->common;
  34
  35         owl_gate_set(common, &comp->gate_hw, false);
  36 }
  37
  38 static int owl_comp_enable(struct clk_hw *hw)
  39 {
  40         struct owl_composite *comp = hw_to_owl_comp(hw);
  41         struct owl_clk_common *common = &comp->common;
  42
  43         owl_gate_set(common, &comp->gate_hw, true);
  44
  45         return 0;
  46 }
  47
  48 static int owl_comp_is_enabled(struct clk_hw *hw)
  49 {
  50         struct owl_composite *comp = hw_to_owl_comp(hw);
  51         struct owl_clk_common *common = &comp->common;
  52
  53         return owl_gate_clk_is_enabled(common, &comp->gate_hw);
  54 }
  55
  56 static long owl_comp_div_round_rate(struct clk_hw *hw, unsigned long rate,
  57                                 unsigned long *parent_rate)
  58 {
  59         struct owl_composite *comp = hw_to_owl_comp(hw);
  60
  61         return owl_divider_helper_round_rate(&comp->common, &comp->rate.div_hw,
  62                                         rate, parent_rate);
  63 }
  64
  65 static unsigned long owl_comp_div_recalc_rate(struct clk_hw *hw,
  66                                           unsigned long parent_rate)
  67 {
  68         struct owl_composite *comp = hw_to_owl_comp(hw);
  69
  70         return owl_divider_helper_recalc_rate(&comp->common, &comp->rate.div_hw,
  71                                         parent_rate);
  72 }
  73
  74 static int owl_comp_div_set_rate(struct clk_hw *hw, unsigned long rate,
  75                                 unsigned long parent_rate)
  76 {
  77         struct owl_composite *comp = hw_to_owl_comp(hw);
  78
  79         return owl_divider_helper_set_rate(&comp->common, &comp->rate.div_hw,
  80                                         rate, parent_rate);
  81 }
  82
  83 static long owl_comp_fact_round_rate(struct clk_hw *hw, unsigned long rate,
  84                         unsigned long *parent_rate)
  85 {
  86         struct owl_composite *comp = hw_to_owl_comp(hw);
  87
  88         return owl_factor_helper_round_rate(&comp->common,
  89                                         &comp->rate.factor_hw,
  90                                         rate, parent_rate);
  91 }
  92
  93 static unsigned long owl_comp_fact_recalc_rate(struct clk_hw *hw,
  94                         unsigned long parent_rate)
  95 {
  96         struct owl_composite *comp = hw_to_owl_comp(hw);
  97
  98         return owl_factor_helper_recalc_rate(&comp->common,
  99                                         &comp->rate.factor_hw,
 100                                         parent_rate);
 101 }
 102
 103 static int owl_comp_fact_set_rate(struct clk_hw *hw, unsigned long rate,
 104                         unsigned long parent_rate)
 105 {
 106         struct owl_composite *comp = hw_to_owl_comp(hw);
 107
 108         return owl_factor_helper_set_rate(&comp->common,
 109                                         &comp->rate.factor_hw,
 110                                         rate, parent_rate);
 111 }
 112
 113 static long owl_comp_fix_fact_round_rate(struct clk_hw *hw, unsigned long rate,
 114                         unsigned long *parent_rate)
 115 {
 116         struct owl_composite *comp = hw_to_owl_comp(hw);
 117         struct clk_fixed_factor *fix_fact_hw = &comp->rate.fix_fact_hw;
 118
 119         return comp->fix_fact_ops->round_rate(&fix_fact_hw->hw, rate, parent_rate);
 120 }
 121
 122 static unsigned long owl_comp_fix_fact_recalc_rate(struct clk_hw *hw,
 123                         unsigned long parent_rate)
 124 {
 125         struct owl_composite *comp = hw_to_owl_comp(hw);
 126         struct clk_fixed_factor *fix_fact_hw = &comp->rate.fix_fact_hw;
 127
 128         return comp->fix_fact_ops->recalc_rate(&fix_fact_hw->hw, parent_rate);
 129
 130 }
 131
 132 static int owl_comp_fix_fact_set_rate(struct clk_hw *hw, unsigned long rate,
 133                         unsigned long parent_rate)
 134 {
 135         /*
 136          * We must report success but we can do so unconditionally because
 137          * owl_comp_fix_fact_round_rate returns values that ensure this call is
 138          * a nop.
 139          */
 140
 141         return 0;
 142 }
 143
 144 const struct clk_ops owl_comp_div_ops = {
 145         /* mux_ops */
 146         .get_parent     = owl_comp_get_parent,
 147         .set_parent     = owl_comp_set_parent,
 148
 149         /* gate_ops */
 150         .disable        = owl_comp_disable,
 151         .enable         = owl_comp_enable,
 152         .is_enabled     = owl_comp_is_enabled,
 153
 154         /* div_ops */
 155         .round_rate     = owl_comp_div_round_rate,
 156         .recalc_rate    = owl_comp_div_recalc_rate,
 157         .set_rate       = owl_comp_div_set_rate,
 158 };
 159
 160
 161 const struct clk_ops owl_comp_fact_ops = {
 162         /* mux_ops */
 163         .get_parent     = owl_comp_get_parent,
 164         .set_parent     = owl_comp_set_parent,
 165
 166         /* gate_ops */
 167         .disable        = owl_comp_disable,
 168         .enable         = owl_comp_enable,
 169         .is_enabled     = owl_comp_is_enabled,
 170
 171         /* fact_ops */
 172         .round_rate     = owl_comp_fact_round_rate,
 173         .recalc_rate    = owl_comp_fact_recalc_rate,
 174         .set_rate       = owl_comp_fact_set_rate,
 175 };
 176
 177 const struct clk_ops owl_comp_fix_fact_ops = {
 178         /* gate_ops */
 179         .disable        = owl_comp_disable,
 180         .enable         = owl_comp_enable,
 181         .is_enabled     = owl_comp_is_enabled,
 182
 183         /* fix_fact_ops */
 184         .round_rate     = owl_comp_fix_fact_round_rate,
 185         .recalc_rate    = owl_comp_fix_fact_recalc_rate,
 186         .set_rate       = owl_comp_fix_fact_set_rate,
 187 };
 188
 189
 190 const struct clk_ops owl_comp_pass_ops = {
 191         /* mux_ops */
 192         .get_parent     = owl_comp_get_parent,
 193         .set_parent     = owl_comp_set_parent,
 194
 195         /* gate_ops */
 196         .disable        = owl_comp_disable,
 197         .enable         = owl_comp_enable,
 198         .is_enabled     = owl_comp_is_enabled,
 199 };