[deliverable/linux.git] / drivers / mfd / abx500-core.c

/*
 * Copyright (C) 2007-2010 ST-Ericsson
 * License terms: GNU General Public License (GPL) version 2
 * Register access functions for the ABX500 Mixed Signal IC family.
 * Author: Mattias Wallin <mattias.wallin@stericsson.com>
 */

#include <linux/list.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/mfd/abx500.h>

static LIST_HEAD(abx500_list);

struct abx500_device_entry {
	struct list_head list;
	struct abx500_ops ops;
	struct device *dev;
};

static void lookup_ops(struct device *dev, struct abx500_ops **ops)
{
	struct abx500_device_entry *dev_entry;

	*ops = NULL;
	list_for_each_entry(dev_entry, &abx500_list, list) {
		if (dev_entry->dev == dev) {
			*ops = &dev_entry->ops;
			return;
		}
	}
}

int abx500_register_ops(struct device *dev, struct abx500_ops *ops)
{
	struct abx500_device_entry *dev_entry;

	dev_entry = devm_kzalloc(dev,
				 sizeof(struct abx500_device_entry),
				 GFP_KERNEL);
	if (!dev_entry) {
		dev_err(dev, "register_ops kzalloc failed");
		return -ENOMEM;
	}
	dev_entry->dev = dev;
	memcpy(&dev_entry->ops, ops, sizeof(struct abx500_ops));

	list_add_tail(&dev_entry->list, &abx500_list);
	return 0;
}
EXPORT_SYMBOL(abx500_register_ops);

void abx500_remove_ops(struct device *dev)
{
	struct abx500_device_entry *dev_entry, *tmp;

	list_for_each_entry_safe(dev_entry, tmp, &abx500_list, list)
		if (dev_entry->dev == dev)
			list_del(&dev_entry->list);
}
EXPORT_SYMBOL(abx500_remove_ops);

int abx500_set_register_interruptible(struct device *dev, u8 bank, u8 reg,
	u8 value)
{
	struct abx500_ops *ops;

	lookup_ops(dev->parent, &ops);
	if ((ops != NULL) && (ops->set_register != NULL))
		return ops->set_register(dev, bank, reg, value);
	else
		return -ENOTSUPP;
}
EXPORT_SYMBOL(abx500_set_register_interruptible);

int abx500_get_register_interruptible(struct device *dev, u8 bank, u8 reg,
	u8 *value)
{
	struct abx500_ops *ops;

	lookup_ops(dev->parent, &ops);
	if ((ops != NULL) && (ops->get_register != NULL))
		return ops->get_register(dev, bank, reg, value);
	else
		return -ENOTSUPP;
}
EXPORT_SYMBOL(abx500_get_register_interruptible);

int abx500_get_register_page_interruptible(struct device *dev, u8 bank,
	u8 first_reg, u8 *regvals, u8 numregs)
{
	struct abx500_ops *ops;

	lookup_ops(dev->parent, &ops);
	if ((ops != NULL) && (ops->get_register_page != NULL))
		return ops->get_register_page(dev, bank,
			first_reg, regvals, numregs);
	else
		return -ENOTSUPP;
}
EXPORT_SYMBOL(abx500_get_register_page_interruptible);

int abx500_mask_and_set_register_interruptible(struct device *dev, u8 bank,
	u8 reg, u8 bitmask, u8 bitvalues)
{
	struct abx500_ops *ops;

	lookup_ops(dev->parent, &ops);
	if ((ops != NULL) && (ops->mask_and_set_register != NULL))
		return ops->mask_and_set_register(dev, bank,
			reg, bitmask, bitvalues);
	else
		return -ENOTSUPP;
}
EXPORT_SYMBOL(abx500_mask_and_set_register_interruptible);

int abx500_get_chip_id(struct device *dev)
{
	struct abx500_ops *ops;

	lookup_ops(dev->parent, &ops);
	if ((ops != NULL) && (ops->get_chip_id != NULL))
		return ops->get_chip_id(dev);
	else
		return -ENOTSUPP;
}
EXPORT_SYMBOL(abx500_get_chip_id);

int abx500_event_registers_startup_state_get(struct device *dev, u8 *event)
{
	struct abx500_ops *ops;

	lookup_ops(dev->parent, &ops);
	if ((ops != NULL) && (ops->event_registers_startup_state_get != NULL))
		return ops->event_registers_startup_state_get(dev, event);
	else
		return -ENOTSUPP;
}
EXPORT_SYMBOL(abx500_event_registers_startup_state_get);

int abx500_startup_irq_enabled(struct device *dev, unsigned int irq)
{
	struct abx500_ops *ops;

	lookup_ops(dev->parent, &ops);
	if ((ops != NULL) && (ops->startup_irq_enabled != NULL))
		return ops->startup_irq_enabled(dev, irq);
	else
		return -ENOTSUPP;
}
EXPORT_SYMBOL(abx500_startup_irq_enabled);

MODULE_AUTHOR("Mattias Wallin <mattias.wallin@stericsson.com>");
MODULE_DESCRIPTION("ABX500 core driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
fa661258 MW	1	/*
	2	* Copyright (C) 2007-2010 ST-Ericsson
	3	* License terms: GNU General Public License (GPL) version 2
	4	* Register access functions for the ABX500 Mixed Signal IC family.
	5	* Author: Mattias Wallin <mattias.wallin@stericsson.com>
	6	*/
	7
	8	#include <linux/list.h>
	9	#include <linux/slab.h>
	10	#include <linux/err.h>
4e36dd33	11	#include <linux/module.h>
fa661258 MW	12	#include <linux/mfd/abx500.h>
	13
	14	static LIST_HEAD(abx500_list);
	15
	16	struct abx500_device_entry {
	17	struct list_head list;
	18	struct abx500_ops ops;
	19	struct device *dev;
	20	};
	21
	22	static void lookup_ops(struct device dev, struct abx500_ops *ops)
	23	{
	24	struct abx500_device_entry *dev_entry;
	25
	26	*ops = NULL;
	27	list_for_each_entry(dev_entry, &abx500_list, list) {
	28	if (dev_entry->dev == dev) {
	29	*ops = &dev_entry->ops;
	30	return;
	31	}
	32	}
	33	}
	34
	35	int abx500_register_ops(struct device dev, struct abx500_ops ops)
	36	{
	37	struct abx500_device_entry *dev_entry;
	38
c211b6b9 LJ	39	dev_entry = devm_kzalloc(dev,
	40	sizeof(struct abx500_device_entry),
	41	GFP_KERNEL);
25fe24f8	42	if (!dev_entry) {
fa661258 MW	43	dev_err(dev, "register_ops kzalloc failed");
	44	return -ENOMEM;
	45	}
	46	dev_entry->dev = dev;
	47	memcpy(&dev_entry->ops, ops, sizeof(struct abx500_ops));
	48
	49	list_add_tail(&dev_entry->list, &abx500_list);
	50	return 0;
	51	}
	52	EXPORT_SYMBOL(abx500_register_ops);
	53
	54	void abx500_remove_ops(struct device *dev)
	55	{
	56	struct abx500_device_entry dev_entry, tmp;
	57
	58	list_for_each_entry_safe(dev_entry, tmp, &abx500_list, list)
c211b6b9	59	if (dev_entry->dev == dev)
fa661258	60	list_del(&dev_entry->list);
fa661258 MW	61	}
	62	EXPORT_SYMBOL(abx500_remove_ops);
	63
	64	int abx500_set_register_interruptible(struct device *dev, u8 bank, u8 reg,
	65	u8 value)
	66	{
	67	struct abx500_ops *ops;
	68
	69	lookup_ops(dev->parent, &ops);
	70	if ((ops != NULL) && (ops->set_register != NULL))
	71	return ops->set_register(dev, bank, reg, value);
	72	else
	73	return -ENOTSUPP;
	74	}
	75	EXPORT_SYMBOL(abx500_set_register_interruptible);
	76
	77	int abx500_get_register_interruptible(struct device *dev, u8 bank, u8 reg,
	78	u8 *value)
	79	{
	80	struct abx500_ops *ops;
	81
	82	lookup_ops(dev->parent, &ops);
	83	if ((ops != NULL) && (ops->get_register != NULL))
	84	return ops->get_register(dev, bank, reg, value);
	85	else
	86	return -ENOTSUPP;
	87	}
	88	EXPORT_SYMBOL(abx500_get_register_interruptible);
	89
	90	int abx500_get_register_page_interruptible(struct device *dev, u8 bank,
	91	u8 first_reg, u8 *regvals, u8 numregs)
	92	{
	93	struct abx500_ops *ops;
	94
	95	lookup_ops(dev->parent, &ops);
	96	if ((ops != NULL) && (ops->get_register_page != NULL))
	97	return ops->get_register_page(dev, bank,
	98	first_reg, regvals, numregs);
	99	else
	100	return -ENOTSUPP;
	101	}
	102	EXPORT_SYMBOL(abx500_get_register_page_interruptible);
	103
	104	int abx500_mask_and_set_register_interruptible(struct device *dev, u8 bank,
	105	u8 reg, u8 bitmask, u8 bitvalues)
	106	{
	107	struct abx500_ops *ops;
	108
	109	lookup_ops(dev->parent, &ops);
	110	if ((ops != NULL) && (ops->mask_and_set_register != NULL))
	111	return ops->mask_and_set_register(dev, bank,
	112	reg, bitmask, bitvalues);
	113	else
	114	return -ENOTSUPP;
	115	}
	116	EXPORT_SYMBOL(abx500_mask_and_set_register_interruptible);
	117
	118	int abx500_get_chip_id(struct device *dev)
	119	{
	120	struct abx500_ops *ops;
	121
	122	lookup_ops(dev->parent, &ops);
	123	if ((ops != NULL) && (ops->get_chip_id != NULL))
	124	return ops->get_chip_id(dev);
125	else
126	return -ENOTSUPP;
127	}
128	EXPORT_SYMBOL(abx500_get_chip_id);
129
130	int abx500_event_registers_startup_state_get(struct device dev, u8 event)
131	{
132	struct abx500_ops *ops;
133
134	lookup_ops(dev->parent, &ops);
135	if ((ops != NULL) && (ops->event_registers_startup_state_get != NULL))
136	return ops->event_registers_startup_state_get(dev, event);
137	else
138	return -ENOTSUPP;
139	}
140	EXPORT_SYMBOL(abx500_event_registers_startup_state_get);
141
142	int abx500_startup_irq_enabled(struct device *dev, unsigned int irq)
143	{
144	struct abx500_ops *ops;
145
146	lookup_ops(dev->parent, &ops);
147	if ((ops != NULL) && (ops->startup_irq_enabled != NULL))
148	return ops->startup_irq_enabled(dev, irq);
149	else
150	return -ENOTSUPP;
151	}
152	EXPORT_SYMBOL(abx500_startup_irq_enabled);
153
154	MODULE_AUTHOR("Mattias Wallin <mattias.wallin@stericsson.com>");
155	MODULE_DESCRIPTION("ABX500 core driver");
156	MODULE_LICENSE("GPL");