2 * arch/arm/plat-omap/include/mach/clockdomain.h
4 * OMAP2/3 clockdomain framework functions
6 * Copyright (C) 2008 Texas Instruments, Inc.
7 * Copyright (C) 2008-2011 Nokia Corporation
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
16 #ifndef __ARCH_ARM_MACH_OMAP2_CLOCKDOMAIN_H
17 #define __ARCH_ARM_MACH_OMAP2_CLOCKDOMAIN_H
19 #include <linux/init.h>
20 #include <linux/spinlock.h>
22 #include "powerdomain.h"
23 #include <plat/clock.h>
24 #include <plat/omap_hwmod.h>
30 * XXX Document CLKDM_CAN_* flags
32 * CLKDM_NO_AUTODEPS: Prevent "autodeps" from being added/removed from this
33 * clockdomain. (Currently, this applies to OMAP3 clockdomains only.)
35 #define CLKDM_CAN_FORCE_SLEEP (1 << 0)
36 #define CLKDM_CAN_FORCE_WAKEUP (1 << 1)
37 #define CLKDM_CAN_ENABLE_AUTO (1 << 2)
38 #define CLKDM_CAN_DISABLE_AUTO (1 << 3)
39 #define CLKDM_NO_AUTODEPS (1 << 4)
41 #define CLKDM_CAN_HWSUP (CLKDM_CAN_ENABLE_AUTO | CLKDM_CAN_DISABLE_AUTO)
42 #define CLKDM_CAN_SWSUP (CLKDM_CAN_FORCE_SLEEP | CLKDM_CAN_FORCE_WAKEUP)
43 #define CLKDM_CAN_HWSUP_SWSUP (CLKDM_CAN_SWSUP | CLKDM_CAN_HWSUP)
46 * struct clkdm_autodep - clkdm deps to add when entering/exiting hwsup mode
47 * @clkdm: clockdomain to add wkdep+sleepdep on - set name member only
48 * @omap_chip: OMAP chip types that this autodep is valid on
50 * A clockdomain that should have wkdeps and sleepdeps added when a
51 * clockdomain should stay active in hwsup mode; and conversely,
52 * removed when the clockdomain should be allowed to go inactive in
55 * Autodeps are deprecated and should be removed after
56 * omap_hwmod-based fine-grained module idle control is added.
58 struct clkdm_autodep {
61 struct clockdomain *ptr;
63 const struct omap_chip_id omap_chip;
67 * struct clkdm_dep - encode dependencies between clockdomains
68 * @clkdm_name: clockdomain name
69 * @clkdm: pointer to the struct clockdomain of @clkdm_name
70 * @omap_chip: OMAP chip types that this dependency is valid on
71 * @wkdep_usecount: Number of wakeup dependencies causing this clkdm to wake
72 * @sleepdep_usecount: Number of sleep deps that could prevent clkdm from idle
74 * Statically defined. @clkdm is resolved from @clkdm_name at runtime and
75 * should not be pre-initialized.
77 * XXX Should also include hardware (fixed) dependencies.
80 const char *clkdm_name;
81 struct clockdomain *clkdm;
82 atomic_t wkdep_usecount;
83 atomic_t sleepdep_usecount;
84 const struct omap_chip_id omap_chip;
87 /* Possible flags for struct clockdomain._flags */
88 #define _CLKDM_FLAG_HWSUP_ENABLED BIT(0)
91 * struct clockdomain - OMAP clockdomain
92 * @name: clockdomain name
93 * @pwrdm: powerdomain containing this clockdomain
94 * @clktrctrl_reg: CLKSTCTRL reg for the given clock domain
95 * @clktrctrl_mask: CLKTRCTRL/AUTOSTATE field mask in CM_CLKSTCTRL reg
96 * @flags: Clockdomain capability flags
97 * @_flags: Flags for use only by internal clockdomain code
98 * @dep_bit: Bit shift of this clockdomain's PM_WKDEP/CM_SLEEPDEP bit
99 * @prcm_partition: (OMAP4 only) PRCM partition ID for this clkdm's registers
100 * @cm_inst: (OMAP4 only) CM instance register offset
101 * @clkdm_offs: (OMAP4 only) CM clockdomain register offset
102 * @wkdep_srcs: Clockdomains that can be told to wake this powerdomain up
103 * @sleepdep_srcs: Clockdomains that can be told to keep this clkdm from inact
104 * @omap_chip: OMAP chip types that this clockdomain is valid on
105 * @usecount: Usecount tracking
106 * @node: list_head to link all clockdomains together
108 * @prcm_partition should be a macro from mach-omap2/prcm44xx.h (OMAP4 only)
109 * @cm_inst should be a macro ending in _INST from the OMAP4 CM instance
110 * definitions (OMAP4 only)
111 * @clkdm_offs should be a macro ending in _CDOFFS from the OMAP4 CM instance
112 * definitions (OMAP4 only)
118 struct powerdomain *ptr;
120 const u16 clktrctrl_mask;
124 const u8 prcm_partition;
126 const u16 clkdm_offs;
127 struct clkdm_dep *wkdep_srcs;
128 struct clkdm_dep *sleepdep_srcs;
129 const struct omap_chip_id omap_chip;
131 struct list_head node;
136 * struct clkdm_ops - Arch specific function implementations
137 * @clkdm_add_wkdep: Add a wakeup dependency between clk domains
138 * @clkdm_del_wkdep: Delete a wakeup dependency between clk domains
139 * @clkdm_read_wkdep: Read wakeup dependency state between clk domains
140 * @clkdm_clear_all_wkdeps: Remove all wakeup dependencies from the clk domain
141 * @clkdm_add_sleepdep: Add a sleep dependency between clk domains
142 * @clkdm_del_sleepdep: Delete a sleep dependency between clk domains
143 * @clkdm_read_sleepdep: Read sleep dependency state between clk domains
144 * @clkdm_clear_all_sleepdeps: Remove all sleep dependencies from the clk domain
145 * @clkdm_sleep: Force a clockdomain to sleep
146 * @clkdm_wakeup: Force a clockdomain to wakeup
147 * @clkdm_allow_idle: Enable hw supervised idle transitions for clock domain
148 * @clkdm_deny_idle: Disable hw supervised idle transitions for clock domain
149 * @clkdm_clk_enable: Put the clkdm in right state for a clock enable
150 * @clkdm_clk_disable: Put the clkdm in right state for a clock disable
153 int (*clkdm_add_wkdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
154 int (*clkdm_del_wkdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
155 int (*clkdm_read_wkdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
156 int (*clkdm_clear_all_wkdeps)(struct clockdomain *clkdm);
157 int (*clkdm_add_sleepdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
158 int (*clkdm_del_sleepdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
159 int (*clkdm_read_sleepdep)(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
160 int (*clkdm_clear_all_sleepdeps)(struct clockdomain *clkdm);
161 int (*clkdm_sleep)(struct clockdomain *clkdm);
162 int (*clkdm_wakeup)(struct clockdomain *clkdm);
163 void (*clkdm_allow_idle)(struct clockdomain *clkdm);
164 void (*clkdm_deny_idle)(struct clockdomain *clkdm);
165 int (*clkdm_clk_enable)(struct clockdomain *clkdm);
166 int (*clkdm_clk_disable)(struct clockdomain *clkdm);
169 void clkdm_init(struct clockdomain **clkdms, struct clkdm_autodep *autodeps,
170 struct clkdm_ops *custom_funcs);
171 struct clockdomain *clkdm_lookup(const char *name);
173 int clkdm_for_each(int (*fn)(struct clockdomain *clkdm, void *user),
175 struct powerdomain *clkdm_get_pwrdm(struct clockdomain *clkdm);
177 int clkdm_add_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
178 int clkdm_del_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
179 int clkdm_read_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
180 int clkdm_clear_all_wkdeps(struct clockdomain *clkdm);
181 int clkdm_add_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
182 int clkdm_del_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
183 int clkdm_read_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2);
184 int clkdm_clear_all_sleepdeps(struct clockdomain *clkdm);
186 void clkdm_allow_idle(struct clockdomain *clkdm);
187 void clkdm_deny_idle(struct clockdomain *clkdm);
188 bool clkdm_in_hwsup(struct clockdomain *clkdm);
190 int clkdm_wakeup(struct clockdomain *clkdm);
191 int clkdm_sleep(struct clockdomain *clkdm);
193 int clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk);
194 int clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk);
195 int clkdm_hwmod_enable(struct clockdomain *clkdm, struct omap_hwmod *oh);
196 int clkdm_hwmod_disable(struct clockdomain *clkdm, struct omap_hwmod *oh);
198 extern void __init omap2xxx_clockdomains_init(void);
199 extern void __init omap3xxx_clockdomains_init(void);
200 extern void __init omap44xx_clockdomains_init(void);
201 extern void _clkdm_add_autodeps(struct clockdomain *clkdm);
202 extern void _clkdm_del_autodeps(struct clockdomain *clkdm);
204 extern struct clkdm_ops omap2_clkdm_operations;
205 extern struct clkdm_ops omap3_clkdm_operations;
206 extern struct clkdm_ops omap4_clkdm_operations;