clockdomain33xx.c

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/*
 * AM33XX clockdomain control
 *
 * Copyright (C) 2011-2012 Texas Instruments Incorporated - http://www.ti.com/
 * Vaibhav Hiremath <[email protected]>
 *
 * Derived from mach-omap2/clockdomain44xx.c written by Rajendra Nayak
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/kernel.h>

#include "clockdomain.h"
#include "cm33xx.h"


static int am33xx_clkdm_sleep(struct clockdomain *clkdm)
{
    am33xx_cm_clkdm_force_sleep(clkdm->cm_inst, clkdm->clkdm_offs);
    return 0;
}

static int am33xx_clkdm_wakeup(struct clockdomain *clkdm)
{
    am33xx_cm_clkdm_force_wakeup(clkdm->cm_inst, clkdm->clkdm_offs);
    return 0;
}

static void am33xx_clkdm_allow_idle(struct clockdomain *clkdm)
{
    am33xx_cm_clkdm_enable_hwsup(clkdm->cm_inst, clkdm->clkdm_offs);
}

static void am33xx_clkdm_deny_idle(struct clockdomain *clkdm)
{
    am33xx_cm_clkdm_disable_hwsup(clkdm->cm_inst, clkdm->clkdm_offs);
}

static int am33xx_clkdm_clk_enable(struct clockdomain *clkdm)
{
    if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)
        return am33xx_clkdm_wakeup(clkdm);

    return 0;
}

static int am33xx_clkdm_clk_disable(struct clockdomain *clkdm)
{
    bool hwsup = false;

    hwsup = am33xx_cm_is_clkdm_in_hwsup(clkdm->cm_inst, clkdm->clkdm_offs);

    if (!hwsup && (clkdm->flags & CLKDM_CAN_FORCE_SLEEP))
        am33xx_clkdm_sleep(clkdm);

    return 0;
}

struct clkdm_ops am33xx_clkdm_operations = {
    .clkdm_sleep        = am33xx_clkdm_sleep,
    .clkdm_wakeup       = am33xx_clkdm_wakeup,
    .clkdm_allow_idle   = am33xx_clkdm_allow_idle,
    .clkdm_deny_idle    = am33xx_clkdm_deny_idle,
    .clkdm_clk_enable   = am33xx_clkdm_clk_enable,
    .clkdm_clk_disable  = am33xx_clkdm_clk_disable,
};