clock-pxa2xx.c

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/*
 * linux/arch/arm/mach-pxa/clock-pxa2xx.c
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/syscore_ops.h>

#include <mach/pxa2xx-regs.h>

#include "clock.h"

void clk_pxa2xx_cken_enable(struct clk *clk)
{
    CKEN |= 1 << clk->cken;
}

void clk_pxa2xx_cken_disable(struct clk *clk)
{
    CKEN &= ~(1 << clk->cken);
}

const struct clkops clk_pxa2xx_cken_ops = {
    .enable     = clk_pxa2xx_cken_enable,
    .disable    = clk_pxa2xx_cken_disable,
};

#ifdef CONFIG_PM
static uint32_t saved_cken;

static int pxa2xx_clock_suspend(void)
{
    saved_cken = CKEN;
    return 0;
}

static void pxa2xx_clock_resume(void)
{
    CKEN = saved_cken;
}
#else
#define pxa2xx_clock_suspend    NULL
#define pxa2xx_clock_resume NULL
#endif

struct syscore_ops pxa2xx_clock_syscore_ops = {
    .suspend    = pxa2xx_clock_suspend,
    .resume     = pxa2xx_clock_resume,
};