1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Copyright (C) 2007-2010 ST-Ericsson |
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/init.h> |
12 | #include <linux/export.h> |
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 | |
40 | dev_entry = devm_kzalloc(dev, size: sizeof(*dev_entry), GFP_KERNEL); |
41 | if (!dev_entry) |
42 | return -ENOMEM; |
43 | |
44 | dev_entry->dev = dev; |
45 | memcpy(&dev_entry->ops, ops, sizeof(*ops)); |
46 | |
47 | list_add_tail(new: &dev_entry->list, head: &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) |
57 | if (dev_entry->dev == dev) |
58 | list_del(entry: &dev_entry->list); |
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: dev->parent, ops: &ops); |
68 | if (ops && ops->set_register) |
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: dev->parent, ops: &ops); |
81 | if (ops && ops->get_register) |
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: dev->parent, ops: &ops); |
94 | if (ops && ops->get_register_page) |
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: dev->parent, ops: &ops); |
108 | if (ops && ops->mask_and_set_register) |
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: dev->parent, ops: &ops); |
121 | if (ops && ops->get_chip_id) |
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: dev->parent, ops: &ops); |
133 | if (ops && ops->event_registers_startup_state_get) |
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: dev->parent, ops: &ops); |
145 | if (ops && ops->startup_irq_enabled) |
146 | return ops->startup_irq_enabled(dev, irq); |
147 | else |
148 | return -ENOTSUPP; |
149 | } |
150 | EXPORT_SYMBOL(abx500_startup_irq_enabled); |
151 | |