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bootloader/u-boot_2015_04/common/cros_ec.c 1.49 KB
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  /*
   * Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
   * Use of this source code is governed by a BSD-style license that can be
   * found in the LICENSE file.
   *
   * Alternatively, this software may be distributed under the terms of the
   * GNU General Public License ("GPL") version 2 as published by the Free
   * Software Foundation.
   */
  
  #include <common.h>
  #include <cros_ec.h>
  #include <dm.h>
  #include <errno.h>
  
  DECLARE_GLOBAL_DATA_PTR;
  
  #ifndef CONFIG_DM_CROS_EC
  struct local_info {
  	struct cros_ec_dev *cros_ec_dev;	/* Pointer to cros_ec device */
  	int cros_ec_err;			/* Error for cros_ec, 0 if ok */
  };
  
  static struct local_info local;
  #endif
  
  struct cros_ec_dev *board_get_cros_ec_dev(void)
  {
  #ifdef CONFIG_DM_CROS_EC
  	struct udevice *dev;
  	int ret;
  
  	ret = uclass_get_device(UCLASS_CROS_EC, 0, &dev);
  	if (ret) {
  		debug("%s: Error %d
  ", __func__, ret);
  		return NULL;
  	}
  	return dev->uclass_priv;
  #else
  	return local.cros_ec_dev;
  #endif
  }
  
  static int board_init_cros_ec_devices(const void *blob)
  {
  #ifndef CONFIG_DM_CROS_EC
  	local.cros_ec_err = cros_ec_init(blob, &local.cros_ec_dev);
  	if (local.cros_ec_err)
  		return -1;  /* Will report in board_late_init() */
  #endif
  
  	return 0;
  }
  
  int cros_ec_board_init(void)
  {
  	return board_init_cros_ec_devices(gd->fdt_blob);
  }
  
  int cros_ec_get_error(void)
  {
  #ifdef CONFIG_DM_CROS_EC
  	struct udevice *dev;
  	int ret;
  
  	ret = uclass_get_device(UCLASS_CROS_EC, 0, &dev);
  	if (ret && ret != -ENODEV)
  		return ret;
  
  	return 0;
  #else
  	return local.cros_ec_err;
  #endif
  }