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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> | |
fdae7ba3 PG |
11 | #include <linux/init.h> |
12 | #include <linux/export.h> | |
fa661258 MW |
13 | #include <linux/mfd/abx500.h> |
14 | ||
15 | static LIST_HEAD(abx500_list); | |
16 | ||
17 | struct abx500_device_entry { | |
18 | struct list_head list; | |
19 | struct abx500_ops ops; | |
20 | struct device *dev; | |
21 | }; | |
22 | ||
23 | static void lookup_ops(struct device *dev, struct abx500_ops **ops) | |
24 | { | |
25 | struct abx500_device_entry *dev_entry; | |
26 | ||
27 | *ops = NULL; | |
28 | list_for_each_entry(dev_entry, &abx500_list, list) { | |
29 | if (dev_entry->dev == dev) { | |
30 | *ops = &dev_entry->ops; | |
31 | return; | |
32 | } | |
33 | } | |
34 | } | |
35 | ||
36 | int abx500_register_ops(struct device *dev, struct abx500_ops *ops) | |
37 | { | |
38 | struct abx500_device_entry *dev_entry; | |
39 | ||
5053e3a3 | 40 | dev_entry = devm_kzalloc(dev, sizeof(*dev_entry), GFP_KERNEL); |
a5e20bfa | 41 | if (!dev_entry) |
fa661258 | 42 | return -ENOMEM; |
a5e20bfa | 43 | |
fa661258 | 44 | dev_entry->dev = dev; |
5053e3a3 | 45 | memcpy(&dev_entry->ops, ops, sizeof(*ops)); |
fa661258 MW |
46 | |
47 | list_add_tail(&dev_entry->list, &abx500_list); | |
48 | return 0; | |
49 | } | |
50 | EXPORT_SYMBOL(abx500_register_ops); | |
51 | ||
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) | |
c211b6b9 | 57 | if (dev_entry->dev == dev) |
fa661258 | 58 | list_del(&dev_entry->list); |
fa661258 MW |
59 | } |
60 | EXPORT_SYMBOL(abx500_remove_ops); | |
61 | ||
62 | int abx500_set_register_interruptible(struct device *dev, u8 bank, u8 reg, | |
63 | u8 value) | |
64 | { | |
65 | struct abx500_ops *ops; | |
66 | ||
67 | lookup_ops(dev->parent, &ops); | |
6271299d | 68 | if (ops && ops->set_register) |
fa661258 MW |
69 | return ops->set_register(dev, bank, reg, value); |
70 | else | |
71 | return -ENOTSUPP; | |
72 | } | |
73 | EXPORT_SYMBOL(abx500_set_register_interruptible); | |
74 | ||
75 | int abx500_get_register_interruptible(struct device *dev, u8 bank, u8 reg, | |
76 | u8 *value) | |
77 | { | |
78 | struct abx500_ops *ops; | |
79 | ||
80 | lookup_ops(dev->parent, &ops); | |
6271299d | 81 | if (ops && ops->get_register) |
fa661258 MW |
82 | return ops->get_register(dev, bank, reg, value); |
83 | else | |
84 | return -ENOTSUPP; | |
85 | } | |
86 | EXPORT_SYMBOL(abx500_get_register_interruptible); | |
87 | ||
88 | int abx500_get_register_page_interruptible(struct device *dev, u8 bank, | |
89 | u8 first_reg, u8 *regvals, u8 numregs) | |
90 | { | |
91 | struct abx500_ops *ops; | |
92 | ||
93 | lookup_ops(dev->parent, &ops); | |
6271299d | 94 | if (ops && ops->get_register_page) |
fa661258 MW |
95 | return ops->get_register_page(dev, bank, |
96 | first_reg, regvals, numregs); | |
97 | else | |
98 | return -ENOTSUPP; | |
99 | } | |
100 | EXPORT_SYMBOL(abx500_get_register_page_interruptible); | |
101 | ||
102 | int abx500_mask_and_set_register_interruptible(struct device *dev, u8 bank, | |
103 | u8 reg, u8 bitmask, u8 bitvalues) | |
104 | { | |
105 | struct abx500_ops *ops; | |
106 | ||
107 | lookup_ops(dev->parent, &ops); | |
6271299d | 108 | if (ops && ops->mask_and_set_register) |
fa661258 MW |
109 | return ops->mask_and_set_register(dev, bank, |
110 | reg, bitmask, bitvalues); | |
111 | else | |
112 | return -ENOTSUPP; | |
113 | } | |
114 | EXPORT_SYMBOL(abx500_mask_and_set_register_interruptible); | |
115 | ||
116 | int abx500_get_chip_id(struct device *dev) | |
117 | { | |
118 | struct abx500_ops *ops; | |
119 | ||
120 | lookup_ops(dev->parent, &ops); | |
6271299d | 121 | if (ops && ops->get_chip_id) |
fa661258 MW |
122 | return ops->get_chip_id(dev); |
123 | else | |
124 | return -ENOTSUPP; | |
125 | } | |
126 | EXPORT_SYMBOL(abx500_get_chip_id); | |
127 | ||
128 | int abx500_event_registers_startup_state_get(struct device *dev, u8 *event) | |
129 | { | |
130 | struct abx500_ops *ops; | |
131 | ||
132 | lookup_ops(dev->parent, &ops); | |
6271299d | 133 | if (ops && ops->event_registers_startup_state_get) |
fa661258 MW |
134 | return ops->event_registers_startup_state_get(dev, event); |
135 | else | |
136 | return -ENOTSUPP; | |
137 | } | |
138 | EXPORT_SYMBOL(abx500_event_registers_startup_state_get); | |
139 | ||
140 | int abx500_startup_irq_enabled(struct device *dev, unsigned int irq) | |
141 | { | |
142 | struct abx500_ops *ops; | |
143 | ||
144 | lookup_ops(dev->parent, &ops); | |
6271299d | 145 | if (ops && ops->startup_irq_enabled) |
fa661258 MW |
146 | return ops->startup_irq_enabled(dev, irq); |
147 | else | |
148 | return -ENOTSUPP; | |
149 | } | |
150 | EXPORT_SYMBOL(abx500_startup_irq_enabled); |