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44da0a51 PW |
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" | |
59fb659b | 29 | #include "prm2xxx_3xxx.h" |
44da0a51 PW |
30 | #include "prm-regbits-24xx.h" |
31 | ||
32 | void __iomem *prcm_clksrc_ctrl; | |
33 | ||
34 | u32 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 | ||
45 | unsigned long omap2xxx_sys_clk_recalc(struct clk *clk) | |
46 | { | |
47 | return clk->parent->rate / omap2xxx_get_sysclkdiv(); | |
48 | } | |
49 | ||
50 |