2 * machine.h -- SoC Regulator support, machine/board driver API.
4 * Copyright (C) 2007, 2008 Wolfson Microelectronics PLC.
6 * Author: Liam Girdwood <lg@opensource.wolfsonmicro.com>
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.
12 * Regulator Machine/Board Interface.
15 #ifndef __LINUX_REGULATOR_MACHINE_H_
16 #define __LINUX_REGULATOR_MACHINE_H_
18 #include <linux/regulator/consumer.h>
19 #include <linux/suspend.h>
24 * Regulator operation constraint flags. These flags are used to enable
25 * certain regulator operations and can be OR'ed together.
27 * VOLTAGE: Regulator output voltage can be changed by software on this
29 * CURRENT: Regulator output current can be changed by software on this
31 * MODE: Regulator operating mode can be changed by software on this
33 * STATUS: Regulator can be enabled and disabled.
34 * DRMS: Dynamic Regulator Mode Switching is enabled for this regulator.
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
44 * struct regulator_state - regulator state during low power syatem states
46 * This describes a regulators state during a system wide low power state.
48 struct regulator_state {
49 int uV; /* suspend voltage */
50 unsigned int mode; /* suspend regulator operating mode */
51 int enabled; /* is regulator enabled in this suspend state */
55 * struct regulation_constraints - regulator operating constraints.
57 * This struct describes regulator and board/machine specific constraints.
59 struct regulation_constraints {
63 /* voltage output range (inclusive) - for voltage control */
67 /* current output range (inclusive) - for current control */
71 /* valid regulator operating modes for this machine */
72 unsigned int valid_modes_mask;
74 /* valid operations for regulator on this machine */
75 unsigned int valid_ops_mask;
77 /* regulator input voltage - only if supply is another regulator */
80 /* regulator suspend states for global PMIC STANDBY/HIBERNATE */
81 struct regulator_state state_disk;
82 struct regulator_state state_mem;
83 struct regulator_state state_standby;
84 suspend_state_t initial_state; /* suspend state to set at init */
86 /* constriant flags */
87 unsigned always_on:1; /* regulator never off when system is on */
88 unsigned boot_on:1; /* bootloader/firmware enabled regulator */
89 unsigned apply_uV:1; /* apply uV constraint iff min == max */
92 int regulator_set_supply(const char *regulator, const char *regulator_supply);
94 const char *regulator_get_supply(const char *regulator);
96 int regulator_set_machine_constraints(const char *regulator,
97 struct regulation_constraints *constraints);
99 int regulator_set_device_supply(const char *regulator, struct device *dev,
102 int regulator_suspend_prepare(suspend_state_t state);