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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 | } |