drivers/misc/misc-uclass.c

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