/*
   * Copyright 2012 Freescale Semiconductor, Inc.
   *
   * The code contained herein is licensed under the GNU General Public
   * License. You may obtain a copy of the GNU General Public License
   * Version 2 or later at the following locations:
   *
   * http://www.opensource.org/licenses/gpl-license.html
   * http://www.gnu.org/copyleft/gpl.html
   */
  
  #include <linux/err.h>
  #include <linux/io.h>
  #include <linux/jiffies.h>
  #include <linux/spinlock.h>
  #include "clk.h"
  
  DEFINE_SPINLOCK(mxs_lock);
  
  int mxs_clk_wait(void __iomem *reg, u8 shift)
  {
  	unsigned long timeout = jiffies + msecs_to_jiffies(10);
  
  	while (readl_relaxed(reg) & (1 << shift))
  		if (time_after(jiffies, timeout))
  			return -ETIMEDOUT;
  
  	return 0;
  }