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87a1b26c PW |
1 | /* |
2 | * OMAP2xxx osc_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/module.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/errno.h> | |
23 | #include <linux/clk.h> | |
24 | #include <linux/io.h> | |
25 | ||
26 | #include <plat/clock.h> | |
27 | ||
28 | #include "clock.h" | |
29 | #include "clock2xxx.h" | |
30 | #include "prm.h" | |
31 | #include "prm-regbits-24xx.h" | |
32 | ||
33 | static int omap2_enable_osc_ck(struct clk *clk) | |
34 | { | |
35 | u32 pcc; | |
36 | ||
37 | pcc = __raw_readl(prcm_clksrc_ctrl); | |
38 | ||
39 | __raw_writel(pcc & ~OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl); | |
40 | ||
41 | return 0; | |
42 | } | |
43 | ||
44 | static void omap2_disable_osc_ck(struct clk *clk) | |
45 | { | |
46 | u32 pcc; | |
47 | ||
48 | pcc = __raw_readl(prcm_clksrc_ctrl); | |
49 | ||
50 | __raw_writel(pcc | OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl); | |
51 | } | |
52 | ||
53 | const struct clkops clkops_oscck = { | |
54 | .enable = omap2_enable_osc_ck, | |
55 | .disable = omap2_disable_osc_ck, | |
56 | }; | |
57 | ||
58 | unsigned long omap2_osc_clk_recalc(struct clk *clk) | |
59 | { | |
60 | return omap2xxx_get_apll_clkin() * omap2xxx_get_sysclkdiv(); | |
61 | } | |
62 |