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Commit | Line | Data |
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046d6b28 | 1 | /* |
da4d2904 | 2 | * clock2xxx.c - OMAP2xxx-specific clock integration code |
046d6b28 | 3 | * |
da4d2904 PW |
4 | * Copyright (C) 2005-2008 Texas Instruments, Inc. |
5 | * Copyright (C) 2004-2010 Nokia Corporation | |
046d6b28 | 6 | * |
da4d2904 PW |
7 | * Contacts: |
8 | * Richard Woodruff <r-woodruff2@ti.com> | |
9 | * Paul Walmsley | |
046d6b28 | 10 | * |
da4d2904 PW |
11 | * Based on earlier work by Tuukka Tikkanen, Tony Lindgren, |
12 | * Gordon McNutt and RidgeRun, Inc. | |
046d6b28 TL |
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 | */ | |
6b8858a9 PW |
18 | #undef DEBUG |
19 | ||
046d6b28 | 20 | #include <linux/kernel.h> |
046d6b28 | 21 | #include <linux/errno.h> |
f8ce2547 | 22 | #include <linux/clk.h> |
6b8858a9 | 23 | #include <linux/io.h> |
046d6b28 | 24 | |
2c799cef | 25 | #include <plat/cpu.h> |
ce491cf8 | 26 | #include <plat/clock.h> |
046d6b28 | 27 | |
6b8858a9 | 28 | #include "clock.h" |
d8a94458 | 29 | #include "clock2xxx.h" |
6b8858a9 PW |
30 | #include "cm.h" |
31 | #include "cm-regbits-24xx.h" | |
046d6b28 | 32 | |
d8a94458 | 33 | struct clk *vclk, *sclk, *dclk; |
046d6b28 | 34 | |
da4d2904 | 35 | /* |
6b8858a9 | 36 | * Omap24xx specific clock functions |
da4d2904 | 37 | */ |
046d6b28 | 38 | |
ae78dcf7 TL |
39 | /* |
40 | * Set clocks for bypass mode for reboot to work. | |
41 | */ | |
feec1277 | 42 | void omap2xxx_clk_prepare_for_reboot(void) |
ae78dcf7 TL |
43 | { |
44 | u32 rate; | |
45 | ||
46 | if (vclk == NULL || sclk == NULL) | |
47 | return; | |
48 | ||
49 | rate = clk_get_rate(sclk); | |
50 | clk_set_rate(vclk, rate); | |
51 | } | |
52 | ||
046d6b28 | 53 | /* |
4d30e82c PW |
54 | * Switch the MPU rate if specified on cmdline. We cannot do this |
55 | * early until cmdline is parsed. XXX This should be removed from the | |
56 | * clock code and handled by the OPP layer code in the near future. | |
046d6b28 | 57 | */ |
4680c29f | 58 | static int __init omap2xxx_clk_arch_init(void) |
046d6b28 | 59 | { |
4d30e82c | 60 | int ret; |
d8a94458 | 61 | |
4680c29f PW |
62 | if (!cpu_is_omap24xx()) |
63 | return 0; | |
64 | ||
4d30e82c PW |
65 | ret = omap2_clk_switch_mpurate_at_boot("virt_prcm_set"); |
66 | if (!ret) | |
67 | omap2_clk_print_new_rates("sys_ck", "dpll_ck", "mpu_ck"); | |
046d6b28 | 68 | |
4d30e82c | 69 | return ret; |
046d6b28 | 70 | } |
4d30e82c | 71 | |
4680c29f | 72 | arch_initcall(omap2xxx_clk_arch_init); |
046d6b28 | 73 | |
046d6b28 | 74 |