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"Das U-Boot" Source Tree
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
4 */
5
6#define LOG_CATEGORY UCLASS_MISC
7
8#include <dm.h>
9#include <errno.h>
10#include <misc.h>
11
12/*
13 * Implement a miscellaneous uclass for those do not fit other more
14 * general classes. A set of generic read, write and ioctl methods may
15 * be used to access the device.
16 */
17
18int misc_read(struct udevice *dev, int offset, void *buf, int size)
19{
20 const struct misc_ops *ops = device_get_ops(dev);
21
22 if (!ops->read)
23 return -ENOSYS;
24
25 return ops->read(dev, offset, buf, size);
26}
27
28int misc_write(struct udevice *dev, int offset, const void *buf, int size)
29{
30 const struct misc_ops *ops = device_get_ops(dev);
31
32 if (!ops->write)
33 return -ENOSYS;
34
35 return ops->write(dev, offset, buf, size);
36}
37
38int misc_ioctl(struct udevice *dev, unsigned long request, void *buf)
39{
40 const struct misc_ops *ops = device_get_ops(dev);
41
42 if (!ops->ioctl)
43 return -ENOSYS;
44
45 return ops->ioctl(dev, request, buf);
46}
47
48int misc_call(struct udevice *dev, int msgid, void *tx_msg, int tx_size,
49 void *rx_msg, int rx_size)
50{
51 const struct misc_ops *ops = device_get_ops(dev);
52
53 if (!ops->call)
54 return -ENOSYS;
55
56 return ops->call(dev, msgid, tx_msg, tx_size, rx_msg, rx_size);
57}
58
59int misc_set_enabled(struct udevice *dev, bool val)
60{
61 const struct misc_ops *ops = device_get_ops(dev);
62
63 if (!ops->set_enabled)
64 return -ENOSYS;
65
66 return ops->set_enabled(dev, val);
67}
68
69UCLASS_DRIVER(misc) = {
70 .id = UCLASS_MISC,
71 .name = "misc",
72#if CONFIG_IS_ENABLED(OF_REAL)
73 .post_bind = dm_scan_fdt_dev,
74#endif
75};