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/arch/arm/mach-omap2/clkt2xxx_sys.c

https://github.com/AICP/kernel_asus_grouper
C | 50 lines | 23 code | 10 blank | 17 comment | 0 complexity | 5f704323c9047985adb43aef4eb651a7 MD5 | raw file
 1/*
 2 * OMAP2xxx sys_clk-specific clock code
 3 *
 4 * Copyright (C) 2005-2008 Texas Instruments, Inc.
 5 * Copyright (C) 2004-2010 Nokia Corporation
 6 *
 7 * Contacts:
 8 * Richard Woodruff <r-woodruff2@ti.com>
 9 * Paul Walmsley
10 *
11 * Based on earlier work by Tuukka Tikkanen, Tony Lindgren,
12 * Gordon McNutt and RidgeRun, Inc.
13 *
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.
17 */
18#undef DEBUG
19
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/clk.h>
23#include <linux/io.h>
24
25#include <plat/clock.h>
26
27#include "clock.h"
28#include "clock2xxx.h"
29#include "prm2xxx_3xxx.h"
30#include "prm-regbits-24xx.h"
31
32void __iomem *prcm_clksrc_ctrl;
33
34u32 omap2xxx_get_sysclkdiv(void)
35{
36	u32 div;
37
38	div = __raw_readl(prcm_clksrc_ctrl);
39	div &= OMAP_SYSCLKDIV_MASK;
40	div >>= OMAP_SYSCLKDIV_SHIFT;
41
42	return div;
43}
44
45unsigned long omap2xxx_sys_clk_recalc(struct clk *clk)
46{
47	return clk->parent->rate / omap2xxx_get_sysclkdiv();
48}
49
50