1 #ifndef __SH_CLOCK_H 2 #define __SH_CLOCK_H 3 4 #include <linux/list.h> 5 #include <linux/seq_file.h> 6 #include <linux/cpufreq.h> 7 #include <linux/types.h> 8 #include <linux/kref.h> 9 #include <linux/clk.h> 10 #include <linux/err.h> 11 12 struct clk; 13 14 struct clk_mapping { 15 phys_addr_t phys; 16 void __iomem *base; 17 unsigned long len; 18 struct kref ref; 19 }; 20 21 struct clk_ops { 22 #ifdef CONFIG_SH_CLK_CPG_LEGACY 23 void (*init)(struct clk *clk); 24 #endif 25 int (*enable)(struct clk *clk); 26 void (*disable)(struct clk *clk); 27 unsigned long (*recalc)(struct clk *clk); 28 int (*set_rate)(struct clk *clk, unsigned long rate); 29 int (*set_parent)(struct clk *clk, struct clk *parent); 30 long (*round_rate)(struct clk *clk, unsigned long rate); 31 }; 32 33 struct clk { 34 struct list_head node; 35 struct clk *parent; 36 struct clk **parent_table; /* list of parents to */ 37 unsigned short parent_num; /* choose between */ 38 unsigned char src_shift; /* source clock field in the */ 39 unsigned char src_width; /* configuration register */ 40 struct clk_ops *ops; 41 42 struct list_head children; 43 struct list_head sibling; /* node for children */ 44 45 int usecount; 46 47 unsigned long rate; 48 unsigned long flags; 49 50 void __iomem *enable_reg; 51 unsigned int enable_bit; 52 53 unsigned long arch_flags; 54 void *priv; 55 struct dentry *dentry; 56 struct clk_mapping *mapping; 57 struct cpufreq_frequency_table *freq_table; 58 unsigned int nr_freqs; 59 }; 60 61 #define CLK_ENABLE_ON_INIT (1 << 0) 62 63 /* drivers/sh/clk.c */ 64 unsigned long followparent_recalc(struct clk *); 65 void recalculate_root_clocks(void); 66 void propagate_rate(struct clk *); 67 int clk_reparent(struct clk *child, struct clk *parent); 68 int clk_register(struct clk *); 69 void clk_unregister(struct clk *); 70 void clk_enable_init_clocks(void); 71 72 struct clk_div_mult_table { 73 unsigned int *divisors; 74 unsigned int nr_divisors; 75 unsigned int *multipliers; 76 unsigned int nr_multipliers; 77 }; 78 79 struct cpufreq_frequency_table; 80 void clk_rate_table_build(struct clk *clk, 81 struct cpufreq_frequency_table *freq_table, 82 int nr_freqs, 83 struct clk_div_mult_table *src_table, 84 unsigned long *bitmap); 85 86 long clk_rate_table_round(struct clk *clk, 87 struct cpufreq_frequency_table *freq_table, 88 unsigned long rate); 89 90 int clk_rate_table_find(struct clk *clk, 91 struct cpufreq_frequency_table *freq_table, 92 unsigned long rate); 93 94 long clk_rate_div_range_round(struct clk *clk, unsigned int div_min, 95 unsigned int div_max, unsigned long rate); 96 97 long clk_round_parent(struct clk *clk, unsigned long target, 98 unsigned long *best_freq, unsigned long *parent_freq, 99 unsigned int div_min, unsigned int div_max); 100 101 #define SH_CLK_MSTP32(_parent, _enable_reg, _enable_bit, _flags) \ 102 { \ 103 .parent = _parent, \ 104 .enable_reg = (void __iomem *)_enable_reg, \ 105 .enable_bit = _enable_bit, \ 106 .flags = _flags, \ 107 } 108 109 int sh_clk_mstp32_register(struct clk *clks, int nr); 110 111 #define SH_CLK_DIV4(_parent, _reg, _shift, _div_bitmap, _flags) \ 112 { \ 113 .parent = _parent, \ 114 .enable_reg = (void __iomem *)_reg, \ 115 .enable_bit = _shift, \ 116 .arch_flags = _div_bitmap, \ 117 .flags = _flags, \ 118 } 119 120 struct clk_div4_table { 121 struct clk_div_mult_table *div_mult_table; 122 void (*kick)(struct clk *clk); 123 }; 124 125 int sh_clk_div4_register(struct clk *clks, int nr, 126 struct clk_div4_table *table); 127 int sh_clk_div4_enable_register(struct clk *clks, int nr, 128 struct clk_div4_table *table); 129 int sh_clk_div4_reparent_register(struct clk *clks, int nr, 130 struct clk_div4_table *table); 131 132 #define SH_CLK_DIV6_EXT(_parent, _reg, _flags, _parents, \ 133 _num_parents, _src_shift, _src_width) \ 134 { \ 135 .parent = _parent, \ 136 .enable_reg = (void __iomem *)_reg, \ 137 .flags = _flags, \ 138 .parent_table = _parents, \ 139 .parent_num = _num_parents, \ 140 .src_shift = _src_shift, \ 141 .src_width = _src_width, \ 142 } 143 144 #define SH_CLK_DIV6(_parent, _reg, _flags) \ 145 SH_CLK_DIV6_EXT(_parent, _reg, _flags, NULL, 0, 0, 0) 146 147 int sh_clk_div6_register(struct clk *clks, int nr); 148 int sh_clk_div6_reparent_register(struct clk *clks, int nr); 149 150 #endif /* __SH_CLOCK_H */ 151