linux/drivers/mfd/abx500-core.c
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   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>
  11#include <linux/module.h>
  12#include <linux/mfd/abx500.h>
  13
  14static LIST_HEAD(abx500_list);
  15
  16struct abx500_device_entry {
  17        struct list_head list;
  18        struct abx500_ops ops;
  19        struct device *dev;
  20};
  21
  22static 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
  35int abx500_register_ops(struct device *dev, struct abx500_ops *ops)
  36{
  37        struct abx500_device_entry *dev_entry;
  38
  39        dev_entry = devm_kzalloc(dev,
  40                                 sizeof(struct abx500_device_entry),
  41                                 GFP_KERNEL);
  42        if (!dev_entry) {
  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}
  52EXPORT_SYMBOL(abx500_register_ops);
  53
  54void 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)
  59                if (dev_entry->dev == dev)
  60                        list_del(&dev_entry->list);
  61}
  62EXPORT_SYMBOL(abx500_remove_ops);
  63
  64int 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}
  75EXPORT_SYMBOL(abx500_set_register_interruptible);
  76
  77int 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}
  88EXPORT_SYMBOL(abx500_get_register_interruptible);
  89
  90int 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}
 102EXPORT_SYMBOL(abx500_get_register_page_interruptible);
 103
 104int 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}
 116EXPORT_SYMBOL(abx500_mask_and_set_register_interruptible);
 117
 118int 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}
 128EXPORT_SYMBOL(abx500_get_chip_id);
 129
 130int 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}
 140EXPORT_SYMBOL(abx500_event_registers_startup_state_get);
 141
 142int 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}
 152EXPORT_SYMBOL(abx500_startup_irq_enabled);
 153
 154void abx500_dump_all_banks(void)
 155{
 156        struct abx500_ops *ops;
 157        struct device dummy_child = {NULL};
 158        struct abx500_device_entry *dev_entry;
 159
 160        list_for_each_entry(dev_entry, &abx500_list, list) {
 161                dummy_child.parent = dev_entry->dev;
 162                ops = &dev_entry->ops;
 163
 164                if ((ops != NULL) && (ops->dump_all_banks != NULL))
 165                        ops->dump_all_banks(&dummy_child);
 166        }
 167}
 168EXPORT_SYMBOL(abx500_dump_all_banks);
 169
 170MODULE_AUTHOR("Mattias Wallin <mattias.wallin@stericsson.com>");
 171MODULE_DESCRIPTION("ABX500 core driver");
 172MODULE_LICENSE("GPL");
 173
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