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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> | |
4e36dd33 | 11 | #include <linux/module.h> |
fa661258 MW |
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 | ||
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 | ||
35 | int abx500_register_ops(struct device *dev, struct abx500_ops *ops) | |
36 | { | |
37 | struct abx500_device_entry *dev_entry; | |
38 | ||
c211b6b9 LJ |
39 | dev_entry = devm_kzalloc(dev, |
40 | sizeof(struct abx500_device_entry), | |
41 | GFP_KERNEL); | |
25fe24f8 | 42 | if (!dev_entry) { |
fa661258 MW |
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 | } | |
52 | EXPORT_SYMBOL(abx500_register_ops); | |
53 | ||
54 | void 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) | |
c211b6b9 | 59 | if (dev_entry->dev == dev) |
fa661258 | 60 | list_del(&dev_entry->list); |
fa661258 MW |
61 | } |
62 | EXPORT_SYMBOL(abx500_remove_ops); | |
63 | ||
64 | int 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 | } | |
75 | EXPORT_SYMBOL(abx500_set_register_interruptible); | |
76 | ||
77 | int 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 | } | |
88 | EXPORT_SYMBOL(abx500_get_register_interruptible); | |
89 | ||
90 | int 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 | } | |
102 | EXPORT_SYMBOL(abx500_get_register_page_interruptible); | |
103 | ||
104 | int 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 | } | |
116 | EXPORT_SYMBOL(abx500_mask_and_set_register_interruptible); | |
117 | ||
118 | int 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 | } | |
128 | EXPORT_SYMBOL(abx500_get_chip_id); | |
129 | ||
130 | int 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 | } | |
140 | EXPORT_SYMBOL(abx500_event_registers_startup_state_get); | |
141 | ||
142 | int 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 | } | |
152 | EXPORT_SYMBOL(abx500_startup_irq_enabled); | |
153 | ||
e0f4fec0 MYK |
154 | void abx500_dump_all_banks(void) |
155 | { | |
156 | struct abx500_ops *ops; | |
194bd7cf | 157 | struct device dummy_child = {NULL}; |
e0f4fec0 MYK |
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 | } | |
168 | EXPORT_SYMBOL(abx500_dump_all_banks); | |
169 | ||
fa661258 MW |
170 | MODULE_AUTHOR("Mattias Wallin <mattias.wallin@stericsson.com>"); |
171 | MODULE_DESCRIPTION("ABX500 core driver"); | |
172 | MODULE_LICENSE("GPL"); |