drivers/misc/misc-uclass.c

   1 /*
   2  * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   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
  18 int 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
  28 int misc_write(struct udevice *dev, int offset, 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
  38 int 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
  48 int 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
  59 UCLASS_DRIVER(misc) = {
  60         .id             = UCLASS_MISC,
  61         .name           = "misc",
  62 };