ARM: 7409/1: Do not call flush_cache_user_range with mmap_sem held
[linux/fpc-iii.git] / arch / arm / mach-omap2 / clkt2xxx_sys.c
blob8693cfdac49afcc53dd213b93cb1eca21b3ccd3e
1 /*
2 * OMAP2xxx sys_clk-specific clock code
4 * Copyright (C) 2005-2008 Texas Instruments, Inc.
5 * Copyright (C) 2004-2010 Nokia Corporation
7 * Contacts:
8 * Richard Woodruff <r-woodruff2@ti.com>
9 * Paul Walmsley
11 * Based on earlier work by Tuukka Tikkanen, Tony Lindgren,
12 * Gordon McNutt and RidgeRun, Inc.
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
18 #undef DEBUG
20 #include <linux/kernel.h>
21 #include <linux/errno.h>
22 #include <linux/clk.h>
23 #include <linux/io.h>
25 #include <plat/clock.h>
27 #include "clock.h"
28 #include "clock2xxx.h"
29 #include "prm2xxx_3xxx.h"
30 #include "prm-regbits-24xx.h"
32 void __iomem *prcm_clksrc_ctrl;
34 u32 omap2xxx_get_sysclkdiv(void)
36 u32 div;
38 div = __raw_readl(prcm_clksrc_ctrl);
39 div &= OMAP_SYSCLKDIV_MASK;
40 div >>= OMAP_SYSCLKDIV_SHIFT;
42 return div;
45 unsigned long omap2xxx_sys_clk_recalc(struct clk *clk)
47 return clk->parent->rate / omap2xxx_get_sysclkdiv();