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 UCLASS_DRIVER(misc) = { 49 .id = UCLASS_MISC, 50 .name = "misc", 51 }; 52