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a085a31af5
On Odroid XU3/4 and other Exynos5422 based boards there is a case, that different devices on the board are supplied by different regulators with non-fixed voltages. If one of these devices temporarily requires higher voltage, there might occur a situation that the spread between devices' voltages is so high, that there is a risk of changing 'high' and 'low' states on the interconnection between devices powered by those regulators. Add new structure "coupling_desc" to regulator_dev, which contains pointers to all coupled regulators including the owner of the structure, number of coupled regulators and counter of currently resolved regulators. Add of_functions to parse all data needed in regulator coupling. Provide method to check DTS data consistency. Check if each coupled regulator's max_spread is equal and if their lists of regulators match. Signed-off-by: Maciej Purski <m.purski@samsung.com> Signed-off-by: Mark Brown <broonie@kernel.org>
117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
/*
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* internal.h -- Voltage/Current Regulator framework internal code
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*
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* Copyright 2007, 2008 Wolfson Microelectronics PLC.
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* Copyright 2008 SlimLogic Ltd.
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*
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* Author: Liam Girdwood <lrg@slimlogic.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#ifndef __REGULATOR_INTERNAL_H
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#define __REGULATOR_INTERNAL_H
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#include <linux/suspend.h>
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#define REGULATOR_STATES_NUM (PM_SUSPEND_MAX + 1)
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struct regulator_voltage {
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int min_uV;
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int max_uV;
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};
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/*
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* struct regulator
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*
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* One for each consumer device.
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* @voltage - a voltage array for each state of runtime, i.e.:
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* PM_SUSPEND_ON
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* PM_SUSPEND_TO_IDLE
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* PM_SUSPEND_STANDBY
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* PM_SUSPEND_MEM
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* PM_SUSPEND_MAX
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*/
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struct regulator {
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struct device *dev;
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struct list_head list;
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unsigned int always_on:1;
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unsigned int bypass:1;
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int uA_load;
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struct regulator_voltage voltage[REGULATOR_STATES_NUM];
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const char *supply_name;
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struct device_attribute dev_attr;
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struct regulator_dev *rdev;
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struct dentry *debugfs;
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};
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extern struct class regulator_class;
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static inline struct regulator_dev *dev_to_rdev(struct device *dev)
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{
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return container_of(dev, struct regulator_dev, dev);
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}
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#ifdef CONFIG_OF
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struct regulator_dev *of_find_regulator_by_node(struct device_node *np);
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struct regulator_init_data *regulator_of_get_init_data(struct device *dev,
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const struct regulator_desc *desc,
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struct regulator_config *config,
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struct device_node **node);
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struct regulator_dev *of_parse_coupled_regulator(struct regulator_dev *rdev,
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int index);
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int of_get_n_coupled(struct regulator_dev *rdev);
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bool of_check_coupling_data(struct regulator_dev *rdev);
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#else
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static inline struct regulator_dev *
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of_find_regulator_by_node(struct device_node *np)
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{
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return NULL;
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}
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static inline struct regulator_init_data *
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regulator_of_get_init_data(struct device *dev,
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const struct regulator_desc *desc,
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struct regulator_config *config,
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struct device_node **node)
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{
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return NULL;
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}
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static inline struct regulator_dev *
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of_parse_coupled_regulator(struct regulator_dev *rdev,
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int index)
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{
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return NULL;
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}
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static inline int of_get_n_coupled(struct regulator_dev *rdev)
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{
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return 0;
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}
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static inline bool of_check_coupling_data(struct regulator_dev *rdev)
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{
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return false;
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}
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#endif
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enum regulator_get_type {
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NORMAL_GET,
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EXCLUSIVE_GET,
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OPTIONAL_GET,
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MAX_GET_TYPE
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};
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struct regulator *_regulator_get(struct device *dev, const char *id,
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enum regulator_get_type get_type);
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#endif
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