1 /* 2 * Copyright 2012 Freescale Semiconductor, Inc. 3 * 4 * The code contained herein is licensed under the GNU General Public 5 * License. You may obtain a copy of the GNU General Public License 6 * Version 2 or later at the following locations: 7 * 8 * http://www.opensource.org/licenses/gpl-license.html 9 * http://www.gnu.org/copyleft/gpl.html 10 */ 11 12 #include <linux/err.h> 13 #include <linux/io.h> 14 #include <linux/jiffies.h> 15 #include <linux/spinlock.h> 16 #include "clk.h" 17 18 DEFINE_SPINLOCK(mxs_lock); 19 20 int mxs_clk_wait(void __iomem *reg, u8 shift) 21 { 22 unsigned long timeout = jiffies + msecs_to_jiffies(10); 23 24 while (readl_relaxed(reg) & (1 << shift)) 25 if (time_after(jiffies, timeout)) 26 return -ETIMEDOUT; 27 28 return 0; 29 } 30