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         .name           = "demo",
  23         .id             = UCLASS_DEMO,
  24 };
  25
  26 int demo_hello(struct udevice *dev, int ch)
  27 {
  28         const struct demo_ops *ops = device_get_ops(dev);
  29
  30         if (!ops->hello)
  31                 return -ENOSYS;
  32
  33         return ops->hello(dev, ch);
  34 }
  35
  36 int demo_status(struct udevice *dev, int *status)
  37 {
  38         const struct demo_ops *ops = device_get_ops(dev);
  39
  40         if (!ops->status)
  41                 return -ENOSYS;
  42
  43         return ops->status(dev, status);
  44 }
  45
  46 int demo_parse_dt(struct udevice *dev)
  47 {
  48         struct dm_demo_pdata *pdata = dev_get_platdata(dev);
  49         int dn = dev->of_offset;
  50
  51         pdata->sides = fdtdec_get_int(gd->fdt_blob, dn, "sides", 0);
  52         pdata->colour = fdt_getprop(gd->fdt_blob, dn, "colour", NULL);
  53         if (!pdata->sides || !pdata->colour) {
  54                 debug("%s: Invalid device tree data\n", __func__);
  55                 return -EINVAL;
  56         }
  57
  58         return 0;
  59 }