blob: 1ce090448493501a23ce9c9da74a4dc81c57182e [file] [log] [blame]
Eric Miao40298132010-11-22 10:49:55 +08001/*
2 * linux/arch/arm/mach-pxa/clock-pxa2xx.c
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8
9#include <linux/module.h>
10#include <linux/kernel.h>
11#include <linux/init.h>
Eric Miaof113fe42010-11-23 17:00:03 +080012#include <linux/sysdev.h>
Eric Miao40298132010-11-22 10:49:55 +080013
14#include <mach/pxa2xx-regs.h>
15
16#include "clock.h"
17
18void clk_pxa2xx_cken_enable(struct clk *clk)
19{
20 CKEN |= 1 << clk->cken;
21}
22
23void clk_pxa2xx_cken_disable(struct clk *clk)
24{
25 CKEN &= ~(1 << clk->cken);
26}
27
28const struct clkops clk_pxa2xx_cken_ops = {
29 .enable = clk_pxa2xx_cken_enable,
30 .disable = clk_pxa2xx_cken_disable,
31};
Eric Miaof113fe42010-11-23 17:00:03 +080032
33#ifdef CONFIG_PM
34static uint32_t saved_cken;
35
36static int pxa2xx_clock_suspend(struct sys_device *d, pm_message_t state)
37{
38 saved_cken = CKEN;
39 return 0;
40}
41
42static int pxa2xx_clock_resume(struct sys_device *d)
43{
44 CKEN = saved_cken;
45 return 0;
46}
47#else
48#define pxa2xx_clock_suspend NULL
49#define pxa2xx_clock_resume NULL
50#endif
51
52struct sysdev_class pxa2xx_clock_sysclass = {
53 .name = "pxa2xx-clock",
54 .suspend = pxa2xx_clock_suspend,
55 .resume = pxa2xx_clock_resume,
56};
Eric Miaoaae82242010-11-23 17:07:48 +080057
58static int __init pxa2xx_clock_init(void)
59{
60 if (cpu_is_pxa2xx())
61 return sysdev_class_register(&pxa2xx_clock_sysclass);
62 return 0;
63}
64postcore_initcall(pxa2xx_clock_init);