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4c1184e8 LG |
1 | /* |
2 | * machine.h -- SoC Regulator support, machine/board driver API. | |
3 | * | |
4 | * Copyright (C) 2007, 2008 Wolfson Microelectronics PLC. | |
5 | * | |
1dd68f01 | 6 | * Author: Liam Girdwood <lrg@slimlogic.co.uk> |
4c1184e8 LG |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * Regulator Machine/Board Interface. | |
13 | */ | |
14 | ||
15 | #ifndef __LINUX_REGULATOR_MACHINE_H_ | |
16 | #define __LINUX_REGULATOR_MACHINE_H_ | |
17 | ||
18 | #include <linux/regulator/consumer.h> | |
19 | #include <linux/suspend.h> | |
20 | ||
21 | struct regulator; | |
22 | ||
23 | /* | |
24 | * Regulator operation constraint flags. These flags are used to enable | |
25 | * certain regulator operations and can be OR'ed together. | |
26 | * | |
27 | * VOLTAGE: Regulator output voltage can be changed by software on this | |
28 | * board/machine. | |
29 | * CURRENT: Regulator output current can be changed by software on this | |
30 | * board/machine. | |
31 | * MODE: Regulator operating mode can be changed by software on this | |
32 | * board/machine. | |
33 | * STATUS: Regulator can be enabled and disabled. | |
34 | * DRMS: Dynamic Regulator Mode Switching is enabled for this regulator. | |
35 | */ | |
36 | ||
37 | #define REGULATOR_CHANGE_VOLTAGE 0x1 | |
38 | #define REGULATOR_CHANGE_CURRENT 0x2 | |
39 | #define REGULATOR_CHANGE_MODE 0x4 | |
40 | #define REGULATOR_CHANGE_STATUS 0x8 | |
41 | #define REGULATOR_CHANGE_DRMS 0x10 | |
42 | ||
43 | /** | |
2e7e65ce | 44 | * struct regulator_state - regulator state during low power system states |
4c1184e8 | 45 | * |
638f85c5 MB |
46 | * This describes a regulators state during a system wide low power |
47 | * state. One of enabled or disabled must be set for the | |
48 | * configuration to be applied. | |
c8e7e464 MB |
49 | * |
50 | * @uV: Operating voltage during suspend. | |
51 | * @mode: Operating mode during suspend. | |
52 | * @enabled: Enabled during suspend. | |
638f85c5 | 53 | * @disabled: Disabled during suspend. |
4c1184e8 LG |
54 | */ |
55 | struct regulator_state { | |
56 | int uV; /* suspend voltage */ | |
57 | unsigned int mode; /* suspend regulator operating mode */ | |
58 | int enabled; /* is regulator enabled in this suspend state */ | |
638f85c5 | 59 | int disabled; /* is the regulator disbled in this suspend state */ |
4c1184e8 LG |
60 | }; |
61 | ||
62 | /** | |
63 | * struct regulation_constraints - regulator operating constraints. | |
64 | * | |
65 | * This struct describes regulator and board/machine specific constraints. | |
c8e7e464 MB |
66 | * |
67 | * @name: Descriptive name for the constraints, used for display purposes. | |
68 | * | |
69 | * @min_uV: Smallest voltage consumers may set. | |
70 | * @max_uV: Largest voltage consumers may set. | |
bf5892a8 MB |
71 | * @uV_offset: Offset applied to voltages from consumer to compensate for |
72 | * voltage drops. | |
c8e7e464 | 73 | * |
15c08f66 | 74 | * @min_uA: Smallest current consumers may set. |
c8e7e464 MB |
75 | * @max_uA: Largest current consumers may set. |
76 | * | |
77 | * @valid_modes_mask: Mask of modes which may be configured by consumers. | |
78 | * @valid_ops_mask: Operations which may be performed by consumers. | |
79 | * | |
80 | * @always_on: Set if the regulator should never be disabled. | |
81 | * @boot_on: Set if the regulator is enabled when the system is initially | |
cacf90f2 MB |
82 | * started. If the regulator is not enabled by the hardware or |
83 | * bootloader then it will be enabled when the constraints are | |
84 | * applied. | |
c8e7e464 MB |
85 | * @apply_uV: Apply the voltage constraint when initialising. |
86 | * | |
87 | * @input_uV: Input voltage for regulator when supplied by another regulator. | |
88 | * | |
89 | * @state_disk: State for regulator when system is suspended in disk mode. | |
90 | * @state_mem: State for regulator when system is suspended in mem mode. | |
91 | * @state_standby: State for regulator when system is suspended in standby | |
92 | * mode. | |
93 | * @initial_state: Suspend state to set by default. | |
a308466c | 94 | * @initial_mode: Mode to set at startup. |
4c1184e8 LG |
95 | */ |
96 | struct regulation_constraints { | |
97 | ||
0151546f | 98 | const char *name; |
4c1184e8 LG |
99 | |
100 | /* voltage output range (inclusive) - for voltage control */ | |
101 | int min_uV; | |
102 | int max_uV; | |
103 | ||
bf5892a8 MB |
104 | int uV_offset; |
105 | ||
4c1184e8 LG |
106 | /* current output range (inclusive) - for current control */ |
107 | int min_uA; | |
108 | int max_uA; | |
109 | ||
110 | /* valid regulator operating modes for this machine */ | |
111 | unsigned int valid_modes_mask; | |
112 | ||
113 | /* valid operations for regulator on this machine */ | |
114 | unsigned int valid_ops_mask; | |
115 | ||
116 | /* regulator input voltage - only if supply is another regulator */ | |
117 | int input_uV; | |
118 | ||
119 | /* regulator suspend states for global PMIC STANDBY/HIBERNATE */ | |
120 | struct regulator_state state_disk; | |
121 | struct regulator_state state_mem; | |
122 | struct regulator_state state_standby; | |
123 | suspend_state_t initial_state; /* suspend state to set at init */ | |
124 | ||
a308466c MB |
125 | /* mode to set on startup */ |
126 | unsigned int initial_mode; | |
127 | ||
2e7e65ce | 128 | /* constraint flags */ |
4c1184e8 LG |
129 | unsigned always_on:1; /* regulator never off when system is on */ |
130 | unsigned boot_on:1; /* bootloader/firmware enabled regulator */ | |
2e7e65ce | 131 | unsigned apply_uV:1; /* apply uV constraint if min == max */ |
4c1184e8 LG |
132 | }; |
133 | ||
a5766f11 LG |
134 | /** |
135 | * struct regulator_consumer_supply - supply -> device mapping | |
136 | * | |
15c08f66 AL |
137 | * This maps a supply name to a device. Use of dev_name allows support for |
138 | * buses which make struct device available late such as I2C. | |
c8e7e464 | 139 | * |
40f9244f | 140 | * @dev_name: Result of dev_name() for the consumer. |
c8e7e464 | 141 | * @supply: Name for the supply. |
a5766f11 LG |
142 | */ |
143 | struct regulator_consumer_supply { | |
40f9244f | 144 | const char *dev_name; /* dev_name() for consumer */ |
a5766f11 LG |
145 | const char *supply; /* consumer supply - e.g. "vcc" */ |
146 | }; | |
4c1184e8 | 147 | |
ed654324 | 148 | /* Initialize struct regulator_consumer_supply */ |
149 | #define REGULATOR_SUPPLY(_name, _dev_name) \ | |
150 | { \ | |
151 | .supply = _name, \ | |
152 | .dev_name = _dev_name, \ | |
153 | } | |
154 | ||
a5766f11 LG |
155 | /** |
156 | * struct regulator_init_data - regulator platform initialisation data. | |
157 | * | |
158 | * Initialisation constraints, our supply and consumers supplies. | |
c8e7e464 | 159 | * |
0178f3e2 MB |
160 | * @supply_regulator: Parent regulator. Specified using the regulator name |
161 | * as it appears in the name field in sysfs, which can | |
162 | * be explicitly set using the constraints field 'name'. | |
c8e7e464 MB |
163 | * |
164 | * @constraints: Constraints. These must be specified for the regulator to | |
165 | * be usable. | |
166 | * @num_consumer_supplies: Number of consumer device supplies. | |
167 | * @consumer_supplies: Consumer device supply configuration. | |
168 | * | |
169 | * @regulator_init: Callback invoked when the regulator has been registered. | |
170 | * @driver_data: Data passed to regulator_init. | |
a5766f11 LG |
171 | */ |
172 | struct regulator_init_data { | |
0178f3e2 | 173 | const char *supply_regulator; /* or NULL for system supply */ |
4c1184e8 | 174 | |
a5766f11 | 175 | struct regulation_constraints constraints; |
4c1184e8 | 176 | |
a5766f11 LG |
177 | int num_consumer_supplies; |
178 | struct regulator_consumer_supply *consumer_supplies; | |
179 | ||
180 | /* optional regulator machine specific init */ | |
181 | int (*regulator_init)(void *driver_data); | |
182 | void *driver_data; /* core does not touch this */ | |
183 | }; | |
4c1184e8 LG |
184 | |
185 | int regulator_suspend_prepare(suspend_state_t state); | |
7a32b589 | 186 | int regulator_suspend_finish(void); |
4c1184e8 | 187 | |
9c19bc04 | 188 | #ifdef CONFIG_REGULATOR |
ca725561 | 189 | void regulator_has_full_constraints(void); |
688fe99a | 190 | void regulator_use_dummy_regulator(void); |
9c19bc04 MB |
191 | #else |
192 | static inline void regulator_has_full_constraints(void) | |
193 | { | |
194 | } | |
688fe99a MB |
195 | |
196 | static inline void regulator_use_dummy_regulator(void) | |
197 | { | |
198 | } | |
9c19bc04 | 199 | #endif |
ca725561 | 200 | |
4c1184e8 | 201 | #endif |