drivers/demo/demo-uclass.c

   1 /*
   2  * Copyright (c) 2013 Google, Inc
   3  *
   4  * (C) Copyright 2012
   5  * Pavel Herrmann <morpheus.ibis@gmail.com>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <common.h>
  11 #include <dm.h>
  12 #include <dm-demo.h>
  13 #include <errno.h>
  14 #include <fdtdec.h>
  15 #include <malloc.h>
  16 #include <asm/io.h>
  17 #include <linux/list.h>
  18
  19 DECLARE_GLOBAL_DATA_PTR;
  20
  21 UCLASS_DRIVER(demo) = {
  22         .id             = UCLASS_DEMO,
  23 };
  24
  25 int demo_hello(struct udevice *dev, int ch)
  26 {
  27         const struct demo_ops *ops = device_get_ops(dev);
  28
  29         if (!ops->hello)
  30                 return -ENOSYS;
  31
  32         return ops->hello(dev, ch);
  33 }
  34
  35 int demo_status(struct udevice *dev, int *status)
  36 {
  37         const struct demo_ops *ops = device_get_ops(dev);
  38
  39         if (!ops->status)
  40                 return -ENOSYS;
  41
  42         return ops->status(dev, status);
  43 }
  44
  45 int demo_parse_dt(struct udevice *dev)
  46 {
  47         struct dm_demo_pdata *pdata = dev_get_platdata(dev);
  48         int dn = dev->of_offset;
  49
  50         pdata->sides = fdtdec_get_int(gd->fdt_blob, dn, "sides", 0);
  51         pdata->colour = fdt_getprop(gd->fdt_blob, dn, "colour", NULL);
  52         if (!pdata->sides || !pdata->colour) {
  53                 debug("%s: Invalid device tree data\n", __func__);
  54                 return -EINVAL;
  55         }
  56
  57         return 0;
  58 }