drivers/clk/pistachio/clk.h

   1 /*
   2  * Copyright (C) 2014 Google, Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms and conditions of the GNU General Public License,
   6  * version 2, as published by the Free Software Foundation.
   7  */
   8
   9 #ifndef __PISTACHIO_CLK_H
  10 #define __PISTACHIO_CLK_H
  11
  12 #include <linux/clk-provider.h>
  13
  14 struct pistachio_gate {
  15         unsigned int id;
  16         unsigned long reg;
  17         unsigned int shift;
  18         const char *name;
  19         const char *parent;
  20 };
  21
  22 #define GATE(_id, _name, _pname, _reg, _shift)  \
  23         {                                       \
  24                 .id     = _id,                  \
  25                 .reg    = _reg,                 \
  26                 .shift  = _shift,               \
  27                 .name   = _name,                \
  28                 .parent = _pname,               \
  29         }
  30
  31 struct pistachio_mux {
  32         unsigned int id;
  33         unsigned long reg;
  34         unsigned int shift;
  35         unsigned int num_parents;
  36         const char *name;
  37         const char **parents;
  38 };
  39
  40 #define PNAME(x) static const char *x[] __initconst
  41
  42 #define MUX(_id, _name, _pnames, _reg, _shift)                  \
  43         {                                                       \
  44                 .id             = _id,                          \
  45                 .reg            = _reg,                         \
  46                 .shift          = _shift,                       \
  47                 .name           = _name,                        \
  48                 .parents        = _pnames,                      \
  49                 .num_parents    = ARRAY_SIZE(_pnames)           \
  50         }
  51
  52
  53 struct pistachio_div {
  54         unsigned int id;
  55         unsigned long reg;
  56         unsigned int width;
  57         unsigned int div_flags;
  58         const char *name;
  59         const char *parent;
  60 };
  61
  62 #define DIV(_id, _name, _pname, _reg, _width)                   \
  63         {                                                       \
  64                 .id             = _id,                          \
  65                 .reg            = _reg,                         \
  66                 .width          = _width,                       \
  67                 .div_flags      = 0,                            \
  68                 .name           = _name,                        \
  69                 .parent         = _pname,                       \
  70         }
  71
  72 #define DIV_F(_id, _name, _pname, _reg, _width, _div_flags)     \
  73         {                                                       \
  74                 .id             = _id,                          \
  75                 .reg            = _reg,                         \
  76                 .width          = _width,                       \
  77                 .div_flags      = _div_flags,                   \
  78                 .name           = _name,                        \
  79                 .parent         = _pname,                       \
  80         }
  81
  82 struct pistachio_fixed_factor {
  83         unsigned int id;
  84         unsigned int div;
  85         const char *name;
  86         const char *parent;
  87 };
  88
  89 #define FIXED_FACTOR(_id, _name, _pname, _div)                  \
  90         {                                                       \
  91                 .id             = _id,                          \
  92                 .div            = _div,                         \
  93                 .name           = _name,                        \
  94                 .parent         = _pname,                       \
  95         }
  96
  97 struct pistachio_pll_rate_table {
  98         unsigned long long fref;
  99         unsigned long long fout;
 100         unsigned long long refdiv;
 101         unsigned long long fbdiv;
 102         unsigned long long postdiv1;
 103         unsigned long long postdiv2;
 104         unsigned long long frac;
 105 };
 106
 107 enum pistachio_pll_type {
 108         PLL_GF40LP_LAINT,
 109         PLL_GF40LP_FRAC,
 110 };
 111
 112 struct pistachio_pll {
 113         unsigned int id;
 114         unsigned long reg_base;
 115         enum pistachio_pll_type type;
 116         struct pistachio_pll_rate_table *rates;
 117         unsigned int nr_rates;
 118         const char *name;
 119         const char *parent;
 120 };
 121
 122 #define PLL(_id, _name, _pname, _type, _reg, _rates)            \
 123         {                                                       \
 124                 .id             = _id,                          \
 125                 .reg_base       = _reg,                         \
 126                 .type           = _type,                        \
 127                 .rates          = _rates,                       \
 128                 .nr_rates       = ARRAY_SIZE(_rates),           \
 129                 .name           = _name,                        \
 130                 .parent         = _pname,                       \
 131         }
 132
 133 #define PLL_FIXED(_id, _name, _pname, _type, _reg)              \
 134         {                                                       \
 135                 .id             = _id,                          \
 136                 .reg_base       = _reg,                         \
 137                 .type           = _type,                        \
 138                 .rates          = NULL,                         \
 139                 .nr_rates       = 0,                            \
 140                 .name           = _name,                        \
 141                 .parent         = _pname,                       \
 142         }
 143
 144 struct pistachio_clk_provider {
 145         struct device_node *node;
 146         void __iomem *base;
 147         struct clk_onecell_data clk_data;
 148 };
 149
 150 extern struct pistachio_clk_provider *
 151 pistachio_clk_alloc_provider(struct device_node *node, unsigned int num_clks);
 152 extern void pistachio_clk_register_provider(struct pistachio_clk_provider *p);
 153
 154 extern void pistachio_clk_register_gate(struct pistachio_clk_provider *p,
 155                                         struct pistachio_gate *gate,
 156                                         unsigned int num);
 157 extern void pistachio_clk_register_mux(struct pistachio_clk_provider *p,
 158                                        struct pistachio_mux *mux,
 159                                        unsigned int num);
 160 extern void pistachio_clk_register_div(struct pistachio_clk_provider *p,
 161                                        struct pistachio_div *div,
 162                                        unsigned int num);
 163 extern void
 164 pistachio_clk_register_fixed_factor(struct pistachio_clk_provider *p,
 165                                     struct pistachio_fixed_factor *ff,
 166                                     unsigned int num);
 167 extern void pistachio_clk_register_pll(struct pistachio_clk_provider *p,
 168                                        struct pistachio_pll *pll,
 169                                        unsigned int num);
 170
 171 extern void pistachio_clk_force_enable(struct pistachio_clk_provider *p,
 172                                        unsigned int *clk_ids, unsigned int num);
 173
 174 #endif