kernel/drivers/clk/mmp/clk.c

   1 #include <linux/io.h>
   2 #include <linux/clk.h>
   3 #include <linux/clk-provider.h>
   4 #include <linux/clkdev.h>
   5 #include <linux/of.h>
   6 #include <linux/of_address.h>
   7
   8 #include "clk.h"
   9
  10 void mmp_clk_init(struct device_node *np, struct mmp_clk_unit *unit,
  11                 int nr_clks)
  12 {
  13         static struct clk **clk_table;
  14
  15         clk_table = kcalloc(nr_clks, sizeof(struct clk *), GFP_KERNEL);
  16         if (!clk_table)
  17                 return;
  18
  19         unit->clk_table = clk_table;
  20         unit->nr_clks = nr_clks;
  21         unit->clk_data.clks = clk_table;
  22         unit->clk_data.clk_num = nr_clks;
  23         of_clk_add_provider(np, of_clk_src_onecell_get, &unit->clk_data);
  24 }
  25
  26 void mmp_register_fixed_rate_clks(struct mmp_clk_unit *unit,
  27                                 struct mmp_param_fixed_rate_clk *clks,
  28                                 int size)
  29 {
  30         int i;
  31         struct clk *clk;
  32
  33         for (i = 0; i < size; i++) {
  34                 clk = clk_register_fixed_rate(NULL, clks[i].name,
  35                                         clks[i].parent_name,
  36                                         clks[i].flags,
  37                                         clks[i].fixed_rate);
  38                 if (IS_ERR(clk)) {
  39                         pr_err("%s: failed to register clock %s\n",
  40                                __func__, clks[i].name);
  41                         continue;
  42                 }
  43                 if (clks[i].id)
  44                         unit->clk_table[clks[i].id] = clk;
  45         }
  46 }
  47
  48 void mmp_register_fixed_factor_clks(struct mmp_clk_unit *unit,
  49                                 struct mmp_param_fixed_factor_clk *clks,
  50                                 int size)
  51 {
  52         struct clk *clk;
  53         int i;
  54
  55         for (i = 0; i < size; i++) {
  56                 clk = clk_register_fixed_factor(NULL, clks[i].name,
  57                                                 clks[i].parent_name,
  58                                                 clks[i].flags, clks[i].mult,
  59                                                 clks[i].div);
  60                 if (IS_ERR(clk)) {
  61                         pr_err("%s: failed to register clock %s\n",
  62                                __func__, clks[i].name);
  63                         continue;
  64                 }
  65                 if (clks[i].id)
  66                         unit->clk_table[clks[i].id] = clk;
  67         }
  68 }
  69
  70 void mmp_register_general_gate_clks(struct mmp_clk_unit *unit,
  71                                 struct mmp_param_general_gate_clk *clks,
  72                                 void __iomem *base, int size)
  73 {
  74         struct clk *clk;
  75         int i;
  76
  77         for (i = 0; i < size; i++) {
  78                 clk = clk_register_gate(NULL, clks[i].name,
  79                                         clks[i].parent_name,
  80                                         clks[i].flags,
  81                                         base + clks[i].offset,
  82                                         clks[i].bit_idx,
  83                                         clks[i].gate_flags,
  84                                         clks[i].lock);
  85
  86                 if (IS_ERR(clk)) {
  87                         pr_err("%s: failed to register clock %s\n",
  88                                __func__, clks[i].name);
  89                         continue;
  90                 }
  91                 if (clks[i].id)
  92                         unit->clk_table[clks[i].id] = clk;
  93         }
  94 }
  95
  96 void mmp_register_gate_clks(struct mmp_clk_unit *unit,
  97                         struct mmp_param_gate_clk *clks,
  98                         void __iomem *base, int size)
  99 {
 100         struct clk *clk;
 101         int i;
 102
 103         for (i = 0; i < size; i++) {
 104                 clk = mmp_clk_register_gate(NULL, clks[i].name,
 105                                         clks[i].parent_name,
 106                                         clks[i].flags,
 107                                         base + clks[i].offset,
 108                                         clks[i].mask,
 109                                         clks[i].val_enable,
 110                                         clks[i].val_disable,
 111                                         clks[i].gate_flags,
 112                                         clks[i].lock);
 113
 114                 if (IS_ERR(clk)) {
 115                         pr_err("%s: failed to register clock %s\n",
 116                                __func__, clks[i].name);
 117                         continue;
 118                 }
 119                 if (clks[i].id)
 120                         unit->clk_table[clks[i].id] = clk;
 121         }
 122 }
 123
 124 void mmp_register_mux_clks(struct mmp_clk_unit *unit,
 125                         struct mmp_param_mux_clk *clks,
 126                         void __iomem *base, int size)
 127 {
 128         struct clk *clk;
 129         int i;
 130
 131         for (i = 0; i < size; i++) {
 132                 clk = clk_register_mux(NULL, clks[i].name,
 133                                         clks[i].parent_name,
 134                                         clks[i].num_parents,
 135                                         clks[i].flags,
 136                                         base + clks[i].offset,
 137                                         clks[i].shift,
 138                                         clks[i].width,
 139                                         clks[i].mux_flags,
 140                                         clks[i].lock);
 141
 142                 if (IS_ERR(clk)) {
 143                         pr_err("%s: failed to register clock %s\n",
 144                                __func__, clks[i].name);
 145                         continue;
 146                 }
 147                 if (clks[i].id)
 148                         unit->clk_table[clks[i].id] = clk;
 149         }
 150 }
 151
 152 void mmp_register_div_clks(struct mmp_clk_unit *unit,
 153                         struct mmp_param_div_clk *clks,
 154                         void __iomem *base, int size)
 155 {
 156         struct clk *clk;
 157         int i;
 158
 159         for (i = 0; i < size; i++) {
 160                 clk = clk_register_divider(NULL, clks[i].name,
 161                                         clks[i].parent_name,
 162                                         clks[i].flags,
 163                                         base + clks[i].offset,
 164                                         clks[i].shift,
 165                                         clks[i].width,
 166                                         clks[i].div_flags,
 167                                         clks[i].lock);
 168
 169                 if (IS_ERR(clk)) {
 170                         pr_err("%s: failed to register clock %s\n",
 171                                __func__, clks[i].name);
 172                         continue;
 173                 }
 174                 if (clks[i].id)
 175                         unit->clk_table[clks[i].id] = clk;
 176         }
 177 }
 178
 179 void mmp_clk_add(struct mmp_clk_unit *unit, unsigned int id,
 180                         struct clk *clk)
 181 {
 182         if (IS_ERR_OR_NULL(clk)) {
 183                 pr_err("CLK %d has invalid pointer %p\n", id, clk);
 184                 return;
 185         }
 186         if (id > unit->nr_clks) {
 187                 pr_err("CLK %d is invalid\n", id);
 188                 return;
 189         }
 190
 191         unit->clk_table[id] = clk;
 192 }