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_get_light(struct udevice *dev)
  47 {
  48         const struct demo_ops *ops = device_get_ops(dev);
  49
  50         if (!ops->get_light)
  51                 return -ENOSYS;
  52
  53         return ops->get_light(dev);
  54 }
  55
  56 int demo_set_light(struct udevice *dev, int light)
  57 {
  58         const struct demo_ops *ops = device_get_ops(dev);
  59
  60         if (!ops->set_light)
  61                 return -ENOSYS;
  62
  63         return ops->set_light(dev, light);
  64 }
  65
  66 int demo_parse_dt(struct udevice *dev)
  67 {
  68         struct dm_demo_pdata *pdata = dev_get_platdata(dev);
  69         int dn = dev_of_offset(dev);
  70
  71         pdata->sides = fdtdec_get_int(gd->fdt_blob, dn, "sides", 0);
  72         pdata->colour = fdt_getprop(gd->fdt_blob, dn, "colour", NULL);
  73         if (!pdata->sides || !pdata->colour) {
  74                 debug("%s: Invalid device tree data\n", __func__);
  75                 return -EINVAL;
  76         }
  77
  78         return 0;
  79 }