[go: nahoru, domu]
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
18DEFINE_SPINLOCK(mxs_lock);
19
20int 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