/* * 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; }