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
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
lookup_ops(struct device * dev,struct abx500_ops ** ops)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
abx500_register_ops(struct device * dev,struct abx500_ops * ops)35 int abx500_register_ops(struct device *dev, struct abx500_ops *ops)
36 {
37 struct abx500_device_entry *dev_entry;
38
39 dev_entry = kzalloc(sizeof(struct abx500_device_entry), GFP_KERNEL);
40 if (!dev_entry) {
41 dev_err(dev, "register_ops kzalloc failed");
42 return -ENOMEM;
43 }
44 dev_entry->dev = dev;
45 memcpy(&dev_entry->ops, ops, sizeof(struct abx500_ops));
46
47 list_add_tail(&dev_entry->list, &abx500_list);
48 return 0;
49 }
50 EXPORT_SYMBOL(abx500_register_ops);
51
abx500_remove_ops(struct device * dev)52 void abx500_remove_ops(struct device *dev)
53 {
54 struct abx500_device_entry *dev_entry, *tmp;
55
56 list_for_each_entry_safe(dev_entry, tmp, &abx500_list, list)
57 {
58 if (dev_entry->dev == dev) {
59 list_del(&dev_entry->list);
60 kfree(dev_entry);
61 }
62 }
63 }
64 EXPORT_SYMBOL(abx500_remove_ops);
65
abx500_set_register_interruptible(struct device * dev,u8 bank,u8 reg,u8 value)66 int abx500_set_register_interruptible(struct device *dev, u8 bank, u8 reg,
67 u8 value)
68 {
69 struct abx500_ops *ops;
70
71 lookup_ops(dev->parent, &ops);
72 if ((ops != NULL) && (ops->set_register != NULL))
73 return ops->set_register(dev, bank, reg, value);
74 else
75 return -ENOTSUPP;
76 }
77 EXPORT_SYMBOL(abx500_set_register_interruptible);
78
abx500_get_register_interruptible(struct device * dev,u8 bank,u8 reg,u8 * value)79 int abx500_get_register_interruptible(struct device *dev, u8 bank, u8 reg,
80 u8 *value)
81 {
82 struct abx500_ops *ops;
83
84 lookup_ops(dev->parent, &ops);
85 if ((ops != NULL) && (ops->get_register != NULL))
86 return ops->get_register(dev, bank, reg, value);
87 else
88 return -ENOTSUPP;
89 }
90 EXPORT_SYMBOL(abx500_get_register_interruptible);
91
abx500_get_register_page_interruptible(struct device * dev,u8 bank,u8 first_reg,u8 * regvals,u8 numregs)92 int abx500_get_register_page_interruptible(struct device *dev, u8 bank,
93 u8 first_reg, u8 *regvals, u8 numregs)
94 {
95 struct abx500_ops *ops;
96
97 lookup_ops(dev->parent, &ops);
98 if ((ops != NULL) && (ops->get_register_page != NULL))
99 return ops->get_register_page(dev, bank,
100 first_reg, regvals, numregs);
101 else
102 return -ENOTSUPP;
103 }
104 EXPORT_SYMBOL(abx500_get_register_page_interruptible);
105
abx500_mask_and_set_register_interruptible(struct device * dev,u8 bank,u8 reg,u8 bitmask,u8 bitvalues)106 int abx500_mask_and_set_register_interruptible(struct device *dev, u8 bank,
107 u8 reg, u8 bitmask, u8 bitvalues)
108 {
109 struct abx500_ops *ops;
110
111 lookup_ops(dev->parent, &ops);
112 if ((ops != NULL) && (ops->mask_and_set_register != NULL))
113 return ops->mask_and_set_register(dev, bank,
114 reg, bitmask, bitvalues);
115 else
116 return -ENOTSUPP;
117 }
118 EXPORT_SYMBOL(abx500_mask_and_set_register_interruptible);
119
abx500_get_chip_id(struct device * dev)120 int abx500_get_chip_id(struct device *dev)
121 {
122 struct abx500_ops *ops;
123
124 lookup_ops(dev->parent, &ops);
125 if ((ops != NULL) && (ops->get_chip_id != NULL))
126 return ops->get_chip_id(dev);
127 else
128 return -ENOTSUPP;
129 }
130 EXPORT_SYMBOL(abx500_get_chip_id);
131
abx500_event_registers_startup_state_get(struct device * dev,u8 * event)132 int abx500_event_registers_startup_state_get(struct device *dev, u8 *event)
133 {
134 struct abx500_ops *ops;
135
136 lookup_ops(dev->parent, &ops);
137 if ((ops != NULL) && (ops->event_registers_startup_state_get != NULL))
138 return ops->event_registers_startup_state_get(dev, event);
139 else
140 return -ENOTSUPP;
141 }
142 EXPORT_SYMBOL(abx500_event_registers_startup_state_get);
143
abx500_startup_irq_enabled(struct device * dev,unsigned int irq)144 int abx500_startup_irq_enabled(struct device *dev, unsigned int irq)
145 {
146 struct abx500_ops *ops;
147
148 lookup_ops(dev->parent, &ops);
149 if ((ops != NULL) && (ops->startup_irq_enabled != NULL))
150 return ops->startup_irq_enabled(dev, irq);
151 else
152 return -ENOTSUPP;
153 }
154 EXPORT_SYMBOL(abx500_startup_irq_enabled);
155
156 MODULE_AUTHOR("Mattias Wallin <mattias.wallin@stericsson.com>");
157 MODULE_DESCRIPTION("ABX500 core driver");
158 MODULE_LICENSE("GPL");
159