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6271299d27
The script “checkpatch.pl” pointed information out like the following. Comparison to NULL could be written … Thus fix the affected source code places. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
151 lines
3.5 KiB
C
151 lines
3.5 KiB
C
/*
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* Copyright (C) 2007-2010 ST-Ericsson
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* License terms: GNU General Public License (GPL) version 2
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* Register access functions for the ABX500 Mixed Signal IC family.
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* Author: Mattias Wallin <mattias.wallin@stericsson.com>
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*/
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#include <linux/list.h>
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#include <linux/slab.h>
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#include <linux/err.h>
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#include <linux/init.h>
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#include <linux/export.h>
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#include <linux/mfd/abx500.h>
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static LIST_HEAD(abx500_list);
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struct abx500_device_entry {
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struct list_head list;
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struct abx500_ops ops;
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struct device *dev;
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};
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static void lookup_ops(struct device *dev, struct abx500_ops **ops)
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{
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struct abx500_device_entry *dev_entry;
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*ops = NULL;
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list_for_each_entry(dev_entry, &abx500_list, list) {
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if (dev_entry->dev == dev) {
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*ops = &dev_entry->ops;
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return;
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}
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}
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}
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int abx500_register_ops(struct device *dev, struct abx500_ops *ops)
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{
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struct abx500_device_entry *dev_entry;
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dev_entry = devm_kzalloc(dev, sizeof(*dev_entry), GFP_KERNEL);
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if (!dev_entry)
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return -ENOMEM;
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dev_entry->dev = dev;
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memcpy(&dev_entry->ops, ops, sizeof(*ops));
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list_add_tail(&dev_entry->list, &abx500_list);
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return 0;
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}
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EXPORT_SYMBOL(abx500_register_ops);
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void abx500_remove_ops(struct device *dev)
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{
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struct abx500_device_entry *dev_entry, *tmp;
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list_for_each_entry_safe(dev_entry, tmp, &abx500_list, list)
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if (dev_entry->dev == dev)
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list_del(&dev_entry->list);
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}
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EXPORT_SYMBOL(abx500_remove_ops);
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int abx500_set_register_interruptible(struct device *dev, u8 bank, u8 reg,
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u8 value)
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{
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struct abx500_ops *ops;
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lookup_ops(dev->parent, &ops);
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if (ops && ops->set_register)
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return ops->set_register(dev, bank, reg, value);
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else
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return -ENOTSUPP;
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}
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EXPORT_SYMBOL(abx500_set_register_interruptible);
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int abx500_get_register_interruptible(struct device *dev, u8 bank, u8 reg,
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u8 *value)
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{
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struct abx500_ops *ops;
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lookup_ops(dev->parent, &ops);
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if (ops && ops->get_register)
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return ops->get_register(dev, bank, reg, value);
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else
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return -ENOTSUPP;
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}
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EXPORT_SYMBOL(abx500_get_register_interruptible);
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int abx500_get_register_page_interruptible(struct device *dev, u8 bank,
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u8 first_reg, u8 *regvals, u8 numregs)
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{
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struct abx500_ops *ops;
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lookup_ops(dev->parent, &ops);
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if (ops && ops->get_register_page)
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return ops->get_register_page(dev, bank,
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first_reg, regvals, numregs);
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else
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return -ENOTSUPP;
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}
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EXPORT_SYMBOL(abx500_get_register_page_interruptible);
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int abx500_mask_and_set_register_interruptible(struct device *dev, u8 bank,
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u8 reg, u8 bitmask, u8 bitvalues)
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{
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struct abx500_ops *ops;
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lookup_ops(dev->parent, &ops);
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if (ops && ops->mask_and_set_register)
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return ops->mask_and_set_register(dev, bank,
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reg, bitmask, bitvalues);
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else
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return -ENOTSUPP;
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}
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EXPORT_SYMBOL(abx500_mask_and_set_register_interruptible);
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int abx500_get_chip_id(struct device *dev)
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{
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struct abx500_ops *ops;
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lookup_ops(dev->parent, &ops);
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if (ops && ops->get_chip_id)
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return ops->get_chip_id(dev);
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else
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return -ENOTSUPP;
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}
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EXPORT_SYMBOL(abx500_get_chip_id);
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int abx500_event_registers_startup_state_get(struct device *dev, u8 *event)
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{
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struct abx500_ops *ops;
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lookup_ops(dev->parent, &ops);
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if (ops && ops->event_registers_startup_state_get)
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return ops->event_registers_startup_state_get(dev, event);
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else
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return -ENOTSUPP;
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}
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EXPORT_SYMBOL(abx500_event_registers_startup_state_get);
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int abx500_startup_irq_enabled(struct device *dev, unsigned int irq)
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{
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struct abx500_ops *ops;
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lookup_ops(dev->parent, &ops);
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if (ops && ops->startup_irq_enabled)
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return ops->startup_irq_enabled(dev, irq);
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else
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return -ENOTSUPP;
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}
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EXPORT_SYMBOL(abx500_startup_irq_enabled);
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