[deliverable/linux.git] / drivers / clk / mxs / clk.c

/*
 * 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;
}
Commit	Line	Data
23b5e15a SG	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>
30ee4006	16	#include "clk.h"
23b5e15a SG	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	}