1 #ifndef __ASM_SH_CLOCK_H 2 #define __ASM_SH_CLOCK_H 3 4 #include <linux/kref.h> 5 #include <linux/list.h> 6 #include <linux/seq_file.h> 7 #include <linux/clk.h> 8 #include <linux/err.h> 9 10 struct clk; 11 12 struct clk_ops { 13 void (*init)(struct clk *clk); 14 void (*enable)(struct clk *clk); 15 void (*disable)(struct clk *clk); 16 void (*recalc)(struct clk *clk); 17 int (*set_rate)(struct clk *clk, unsigned long rate, int algo_id); 18 long (*round_rate)(struct clk *clk, unsigned long rate); 19 }; 20 21 struct clk { 22 struct list_head node; 23 const char *name; 24 int id; 25 struct module *owner; 26 27 struct clk *parent; 28 struct clk_ops *ops; 29 30 struct kref kref; 31 32 unsigned long rate; 33 unsigned long flags; 34 unsigned long arch_flags; 35 }; 36 37 #define CLK_ALWAYS_ENABLED (1 << 0) 38 #define CLK_RATE_PROPAGATES (1 << 1) 39 40 /* Should be defined by processor-specific code */ 41 void arch_init_clk_ops(struct clk_ops **, int type); 42 int __init arch_clk_init(void); 43 44 /* arch/sh/kernel/cpu/clock.c */ 45 int clk_init(void); 46 47 void clk_recalc_rate(struct clk *); 48 49 int clk_register(struct clk *); 50 void clk_unregister(struct clk *); 51 52 static inline int clk_always_enable(const char *id) 53 { 54 struct clk *clk; 55 int ret; 56 57 clk = clk_get(NULL, id); 58 if (IS_ERR(clk)) 59 return PTR_ERR(clk); 60 61 ret = clk_enable(clk); 62 if (ret) 63 clk_put(clk); 64 65 return ret; 66 } 67 68 /* the exported API, in addition to clk_set_rate */ 69 /** 70 * clk_set_rate_ex - set the clock rate for a clock source, with additional parameter 71 * @clk: clock source 72 * @rate: desired clock rate in Hz 73 * @algo_id: algorithm id to be passed down to ops->set_rate 74 * 75 * Returns success (0) or negative errno. 76 */ 77 int clk_set_rate_ex(struct clk *clk, unsigned long rate, int algo_id); 78 79 enum clk_sh_algo_id { 80 NO_CHANGE = 0, 81 82 IUS_N1_N1, 83 IUS_322, 84 IUS_522, 85 IUS_N11, 86 87 SB_N1, 88 89 SB3_N1, 90 SB3_32, 91 SB3_43, 92 SB3_54, 93 94 BP_N1, 95 96 IP_N1, 97 }; 98 #endif /* __ASM_SH_CLOCK_H */ 99