linux-stable/drivers/mfd/abx500-core.c
Thomas Gleixner af873fcece treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194
Based on 1 normalized pattern(s):

  license terms gnu general public license gpl version 2

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 161 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Steve Winslow <swinslow@gmail.com>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190528170027.447718015@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:29:22 -07:00

151 lines
3.5 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2007-2010 ST-Ericsson
* 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/init.h>
#include <linux/export.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(*dev_entry), GFP_KERNEL);
if (!dev_entry)
return -ENOMEM;
dev_entry->dev = dev;
memcpy(&dev_entry->ops, ops, sizeof(*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 && ops->set_register)
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 && ops->get_register)
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 && ops->get_register_page)
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 && ops->mask_and_set_register)
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 && ops->get_chip_id)
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 && ops->event_registers_startup_state_get)
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 && ops->startup_irq_enabled)
return ops->startup_irq_enabled(dev, irq);
else
return -ENOTSUPP;
}
EXPORT_SYMBOL(abx500_startup_irq_enabled);