| 1 | /* linux/arch/arm/plat-s3c/include/plat/clock.h |
| 2 | * |
| 3 | * Copyright (c) 2004-2005 Simtec Electronics |
| 4 | * http://www.simtec.co.uk/products/SWLINUX/ |
| 5 | * Written by Ben Dooks, <ben@simtec.co.uk> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/spinlock.h> |
| 13 | |
| 14 | struct clk; |
| 15 | |
| 16 | /** |
| 17 | * struct clk_ops - standard clock operations |
| 18 | * @set_rate: set the clock rate, see clk_set_rate(). |
| 19 | * @get_rate: get the clock rate, see clk_get_rate(). |
| 20 | * @round_rate: round a given clock rate, see clk_round_rate(). |
| 21 | * @set_parent: set the clock's parent, see clk_set_parent(). |
| 22 | * |
| 23 | * Group the common clock implementations together so that we |
| 24 | * don't have to keep setting the same fields again. We leave |
| 25 | * enable in struct clk. |
| 26 | * |
| 27 | * Adding an extra layer of indirection into the process should |
| 28 | * not be a problem as it is unlikely these operations are going |
| 29 | * to need to be called quickly. |
| 30 | */ |
| 31 | struct clk_ops { |
| 32 | int (*set_rate)(struct clk *c, unsigned long rate); |
| 33 | unsigned long (*get_rate)(struct clk *c); |
| 34 | unsigned long (*round_rate)(struct clk *c, unsigned long rate); |
| 35 | int (*set_parent)(struct clk *c, struct clk *parent); |
| 36 | }; |
| 37 | |
| 38 | struct clk { |
| 39 | struct list_head list; |
| 40 | struct module *owner; |
| 41 | struct clk *parent; |
| 42 | const char *name; |
| 43 | int id; |
| 44 | int usage; |
| 45 | unsigned long rate; |
| 46 | unsigned long ctrlbit; |
| 47 | |
| 48 | struct clk_ops *ops; |
| 49 | int (*enable)(struct clk *, int enable); |
| 50 | #if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS) |
| 51 | struct dentry *dent; /* For visible tree hierarchy */ |
| 52 | #endif |
| 53 | }; |
| 54 | |
| 55 | /* other clocks which may be registered by board support */ |
| 56 | |
| 57 | extern struct clk s3c24xx_dclk0; |
| 58 | extern struct clk s3c24xx_dclk1; |
| 59 | extern struct clk s3c24xx_clkout0; |
| 60 | extern struct clk s3c24xx_clkout1; |
| 61 | extern struct clk s3c24xx_uclk; |
| 62 | |
| 63 | extern struct clk clk_usb_bus; |
| 64 | |
| 65 | /* core clock support */ |
| 66 | |
| 67 | extern struct clk clk_f; |
| 68 | extern struct clk clk_h; |
| 69 | extern struct clk clk_p; |
| 70 | extern struct clk clk_mpll; |
| 71 | extern struct clk clk_upll; |
| 72 | extern struct clk clk_epll; |
| 73 | extern struct clk clk_xtal; |
| 74 | extern struct clk clk_ext; |
| 75 | |
| 76 | /* S3C64XX specific clocks */ |
| 77 | extern struct clk clk_h2; |
| 78 | extern struct clk clk_27m; |
| 79 | extern struct clk clk_48m; |
| 80 | extern struct clk clk_xusbxti; |
| 81 | |
| 82 | extern int clk_default_setrate(struct clk *clk, unsigned long rate); |
| 83 | extern struct clk_ops clk_ops_def_setrate; |
| 84 | |
| 85 | /* exports for arch/arm/mach-s3c2410 |
| 86 | * |
| 87 | * Please DO NOT use these outside of arch/arm/mach-s3c2410 |
| 88 | */ |
| 89 | |
| 90 | extern spinlock_t clocks_lock; |
| 91 | |
| 92 | extern int s3c2410_clkcon_enable(struct clk *clk, int enable); |
| 93 | |
| 94 | extern int s3c24xx_register_clock(struct clk *clk); |
| 95 | extern int s3c24xx_register_clocks(struct clk **clk, int nr_clks); |
| 96 | |
| 97 | extern void s3c_register_clocks(struct clk *clk, int nr_clks); |
| 98 | extern void s3c_disable_clocks(struct clk *clkp, int nr_clks); |
| 99 | |
| 100 | extern int s3c24xx_register_baseclocks(unsigned long xtal); |
| 101 | |
| 102 | extern void s5p_register_clocks(unsigned long xtal_freq); |
| 103 | |
| 104 | extern void s3c24xx_setup_clocks(unsigned long fclk, |
| 105 | unsigned long hclk, |
| 106 | unsigned long pclk); |
| 107 | |
| 108 | extern void s3c2410_setup_clocks(void); |
| 109 | extern void s3c2412_setup_clocks(void); |
| 110 | extern void s3c244x_setup_clocks(void); |
| 111 | extern void s3c2443_setup_clocks(void); |
| 112 | |
| 113 | /* S3C64XX specific functions and clocks */ |
| 114 | |
| 115 | extern int s3c64xx_sclk_ctrl(struct clk *clk, int enable); |
| 116 | |
| 117 | /* Init for pwm clock code */ |
| 118 | |
| 119 | extern void s3c_pwmclk_init(void); |
| 120 | |