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gerrit-public.fairphone.software / kernel / msm-4.19 / f0a108b7227c4328c7a32514ee6a4ceffaaed886 / . / arch / arm / plat-samsung / include / plat / clock.h
blob: df45d6edc98d9e723242f3890e1ea4df124d8888 [file] [log] [blame]
Ben Dooksa5030592008-10-21 14:06:43 +0100[diff] [blame]1/* linux/arch/arm/plat-s3c/include/plat/clock.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]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
Kukjin Kim3a0ec252011-08-19 21:12:19 +0900[diff] [blame]12#ifndef __ASM_PLAT_CLOCK_H
13#define __ASM_PLAT_CLOCK_H __FILE__
14
Ben Dooksc3391e32008-10-21 14:06:37 +0100[diff] [blame]15#include <linux/spinlock.h>
Thomas Abrahamf86c6662011-06-14 19:12:26 +0900[diff] [blame]16#include <linux/clkdev.h>
Ben Dooksc3391e32008-10-21 14:06:37 +0100[diff] [blame]17
Ben Dooksb3bf41b2009-12-01 01:24:37 +0000[diff] [blame]18struct clk;
19
20/**
21 * struct clk_ops - standard clock operations
22 * @set_rate: set the clock rate, see clk_set_rate().
23 * @get_rate: get the clock rate, see clk_get_rate().
24 * @round_rate: round a given clock rate, see clk_round_rate().
25 * @set_parent: set the clock's parent, see clk_set_parent().
26 *
27 * Group the common clock implementations together so that we
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300[diff] [blame]28 * don't have to keep setting the same fields again. We leave
Ben Dooksb3bf41b2009-12-01 01:24:37 +0000[diff] [blame]29 * enable in struct clk.
30 *
31 * Adding an extra layer of indirection into the process should
32 * not be a problem as it is unlikely these operations are going
33 * to need to be called quickly.
34 */
35struct clk_ops {
36 int (*set_rate)(struct clk *c, unsigned long rate);
37 unsigned long (*get_rate)(struct clk *c);
38 unsigned long (*round_rate)(struct clk *c, unsigned long rate);
39 int (*set_parent)(struct clk *c, struct clk *parent);
40};
41
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]42struct clk {
43 struct list_head list;
44 struct module *owner;
45 struct clk *parent;
46 const char *name;
Thomas Abrahamf86c6662011-06-14 19:12:26 +0900[diff] [blame]47 const char *devname;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]48 int id;
Ben Dooks2a513ce2006-02-08 21:09:05 +0000[diff] [blame]49 int usage;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]50 unsigned long rate;
51 unsigned long ctrlbit;
Ben Dooksd3468da2006-03-20 17:10:04 +0000[diff] [blame]52
Ben Dooksb3bf41b2009-12-01 01:24:37 +0000[diff] [blame]53 struct clk_ops *ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]54 int (*enable)(struct clk *, int enable);
Thomas Abrahamf86c6662011-06-14 19:12:26 +0900[diff] [blame]55 struct clk_lookup lookup;
Amit Daniel Kachhap436c3872011-01-12 13:40:04 +0900[diff] [blame]56#if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS)
57 struct dentry *dent; /* For visible tree hierarchy */
58#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]59};
60
61/* other clocks which may be registered by board support */
62
63extern struct clk s3c24xx_dclk0;
64extern struct clk s3c24xx_dclk1;
65extern struct clk s3c24xx_clkout0;
66extern struct clk s3c24xx_clkout1;
67extern struct clk s3c24xx_uclk;
68
Ben Dooks36c64af2006-03-20 21:00:48 +0000[diff] [blame]69extern struct clk clk_usb_bus;
70
Ben Dooks99c13852006-06-22 22:18:20 +0100[diff] [blame]71/* core clock support */
72
73extern struct clk clk_f;
74extern struct clk clk_h;
75extern struct clk clk_p;
Ben Dooks513846f2006-06-24 21:21:29 +0100[diff] [blame]76extern struct clk clk_mpll;
Ben Dooks99c13852006-06-22 22:18:20 +0100[diff] [blame]77extern struct clk clk_upll;
Ben Dooks4b31d8b2008-10-21 14:07:00 +0100[diff] [blame]78extern struct clk clk_epll;
Ben Dooks513846f2006-06-24 21:21:29 +0100[diff] [blame]79extern struct clk clk_xtal;
Ben Dooks4b31d8b2008-10-21 14:07:00 +0100[diff] [blame]80extern struct clk clk_ext;
81
Heiko Stuebner4083da32012-01-27 16:16:19 +0900[diff] [blame]82/* S3C2443/S3C2416 specific clocks */
83extern struct clksrc_clk clk_epllref;
84extern struct clksrc_clk clk_esysclk;
85
Sylwester Nawrockid8174682013-07-24 13:23:51 +0900[diff] [blame]86/* S3C24XX UART clocks */
87extern struct clk s3c24xx_clk_uart0;
88extern struct clk s3c24xx_clk_uart1;
89extern struct clk s3c24xx_clk_uart2;
90
Ben Dooks4b31d8b2008-10-21 14:07:00 +0100[diff] [blame]91/* S3C64XX specific clocks */
Werner Almesbergera03f7da2009-03-05 11:43:13 +0800[diff] [blame]92extern struct clk clk_h2;
Ben Dooks4b31d8b2008-10-21 14:07:00 +0100[diff] [blame]93extern struct clk clk_27m;
94extern struct clk clk_48m;
Maurus Cuelenaere05e021f2010-05-17 20:17:42 +0200[diff] [blame]95extern struct clk clk_xusbxti;
Ben Dooks99c13852006-06-22 22:18:20 +0100[diff] [blame]96
Kukjin Kimed276842010-01-14 12:50:23 +0900[diff] [blame]97extern int clk_default_setrate(struct clk *clk, unsigned long rate);
98extern struct clk_ops clk_ops_def_setrate;
99
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]100/* exports for arch/arm/mach-s3c2410
101 *
102 * Please DO NOT use these outside of arch/arm/mach-s3c2410
103*/
104
Ben Dooksc3391e32008-10-21 14:06:37 +0100[diff] [blame]105extern spinlock_t clocks_lock;
Ben Dooks36c64af2006-03-20 21:00:48 +0000[diff] [blame]106
Ben Dooks99c13852006-06-22 22:18:20 +0100[diff] [blame]107extern int s3c2410_clkcon_enable(struct clk *clk, int enable);
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]109extern int s3c24xx_register_clock(struct clk *clk);
Ben Dooksce89c202007-04-20 11:15:27 +0100[diff] [blame]110extern int s3c24xx_register_clocks(struct clk **clk, int nr_clks);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]111
Ben Dooks1d9f13c2010-01-06 01:21:38 +0900[diff] [blame]112extern void s3c_register_clocks(struct clk *clk, int nr_clks);
Ben Dooks4e046912010-04-28 12:58:13 +0900[diff] [blame]113extern void s3c_disable_clocks(struct clk *clkp, int nr_clks);
Ben Dooks1d9f13c2010-01-06 01:21:38 +0900[diff] [blame]114
Ben Dookse4253822008-10-21 14:06:38 +0100[diff] [blame]115extern int s3c24xx_register_baseclocks(unsigned long xtal);
116
Kukjin Kim1a0e8a52010-01-14 08:13:37 +0900[diff] [blame]117extern void s5p_register_clocks(unsigned long xtal_freq);
Ben Dooks4b31d8b2008-10-21 14:07:00 +0100[diff] [blame]118
Ben Dookse4253822008-10-21 14:06:38 +0100[diff] [blame]119extern void s3c24xx_setup_clocks(unsigned long fclk,
120 unsigned long hclk,
121 unsigned long pclk);
122
123extern void s3c2410_setup_clocks(void);
124extern void s3c2412_setup_clocks(void);
125extern void s3c244x_setup_clocks(void);
Ben Dookse4253822008-10-21 14:06:38 +0100[diff] [blame]126
Heiko Stuebner507164d2012-01-27 16:22:57 +0900[diff] [blame]127/* S3C2410 specific clock functions */
128
129extern int s3c2410_baseclk_add(void);
130
Heiko Stuebner4083da32012-01-27 16:16:19 +0900[diff] [blame]131/* S3C2443/S3C2416 specific clock functions */
132
133typedef unsigned int (*pll_fn)(unsigned int reg, unsigned int base);
134
135extern void s3c2443_common_setup_clocks(pll_fn get_mpll);
136extern void s3c2443_common_init_clocks(int xtal, pll_fn get_mpll,
137 unsigned int *divs, int nr_divs,
138 int divmask);
139
140extern int s3c2443_clkcon_enable_h(struct clk *clk, int enable);
141extern int s3c2443_clkcon_enable_p(struct clk *clk, int enable);
142extern int s3c2443_clkcon_enable_s(struct clk *clk, int enable);
143
Ben Dookscf18acf2008-10-21 14:07:02 +0100[diff] [blame]144/* S3C64XX specific functions and clocks */
145
146extern int s3c64xx_sclk_ctrl(struct clk *clk, int enable);
Ben Dooks9d325f22008-11-21 10:36:05 +0000[diff] [blame]147
148/* Init for pwm clock code */
149
150extern void s3c_pwmclk_init(void);
151
Marek Szyprowskicaf27302011-09-05 20:10:06 +0900[diff] [blame]152/* Global watchdog clock used by arch_wtd_reset() callback */
153
154extern struct clk *s3c2410_wdtclk;
Kukjin Kim3a0ec252011-08-19 21:12:19 +0900[diff] [blame]155
156#endif /* __ASM_PLAT_CLOCK_H */