common/cros_ec.c

   1 /*
   2  * Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
   3  * Use of this source code is governed by a BSD-style license that can be
   4  * found in the LICENSE file.
   5  *
   6  * Alternatively, this software may be distributed under the terms of the
   7  * GNU General Public License ("GPL") version 2 as published by the Free
   8  * Software Foundation.
   9  */
  10
  11 #include <common.h>
  12 #include <cros_ec.h>
  13 #include <dm.h>
  14 #include <errno.h>
  15
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 #ifndef CONFIG_DM_CROS_EC
  19 struct local_info {
  20         struct cros_ec_dev *cros_ec_dev;        /* Pointer to cros_ec device */
  21         int cros_ec_err;                        /* Error for cros_ec, 0 if ok */
  22 };
  23
  24 static struct local_info local;
  25 #endif
  26
  27 struct cros_ec_dev *board_get_cros_ec_dev(void)
  28 {
  29 #ifdef CONFIG_DM_CROS_EC
  30         struct udevice *dev;
  31         int ret;
  32
  33         ret = uclass_get_device(UCLASS_CROS_EC, 0, &dev);
  34         if (ret) {
  35                 debug("%s: Error %d\n", __func__, ret);
  36                 return NULL;
  37         }
  38         return dev->uclass_priv;
  39 #else
  40         return local.cros_ec_dev;
  41 #endif
  42 }
  43
  44 static int board_init_cros_ec_devices(const void *blob)
  45 {
  46 #ifndef CONFIG_DM_CROS_EC
  47         local.cros_ec_err = cros_ec_init(blob, &local.cros_ec_dev);
  48         if (local.cros_ec_err)
  49                 return -1;  /* Will report in board_late_init() */
  50 #endif
  51
  52         return 0;
  53 }
  54
  55 int cros_ec_board_init(void)
  56 {
  57         return board_init_cros_ec_devices(gd->fdt_blob);
  58 }
  59
  60 int cros_ec_get_error(void)
  61 {
  62 #ifdef CONFIG_DM_CROS_EC
  63         struct udevice *dev;
  64         int ret;
  65
  66         ret = uclass_get_device(UCLASS_CROS_EC, 0, &dev);
  67         if (ret && ret != -ENODEV)
  68                 return ret;
  69
  70         return 0;
  71 #else
  72         return local.cros_ec_err;
  73 #endif
  74 }