clkt_iclk.c

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/*
 * OMAP2/3 interface clock control
 *
 * Copyright (C) 2011 Nokia Corporation
 * Paul Walmsley
 *
 * 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.
 */
#undef DEBUG

#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/io.h>

#include <plat/clock.h>
#include <plat/prcm.h>

#include "clock.h"
#include "clock2xxx.h"
#include "cm2xxx_3xxx.h"
#include "cm-regbits-24xx.h"

/* Private functions */

/* XXX */
void omap2_clkt_iclk_allow_idle(struct clk *clk)
{
    u32 v, r;

    r = ((__force u32)clk->enable_reg ^ (CM_AUTOIDLE ^ CM_ICLKEN));

    v = __raw_readl((__force void __iomem *)r);
    v |= (1 << clk->enable_bit);
    __raw_writel(v, (__force void __iomem *)r);
}

/* XXX */
void omap2_clkt_iclk_deny_idle(struct clk *clk)
{
    u32 v, r;

    r = ((__force u32)clk->enable_reg ^ (CM_AUTOIDLE ^ CM_ICLKEN));

    v = __raw_readl((__force void __iomem *)r);
    v &= ~(1 << clk->enable_bit);
    __raw_writel(v, (__force void __iomem *)r);
}

/* Public data */

const struct clkops clkops_omap2_iclk_dflt_wait = {
    .enable     = omap2_dflt_clk_enable,
    .disable    = omap2_dflt_clk_disable,
    .find_companion = omap2_clk_dflt_find_companion,
    .find_idlest    = omap2_clk_dflt_find_idlest,
    .allow_idle = omap2_clkt_iclk_allow_idle,
    .deny_idle  = omap2_clkt_iclk_deny_idle,
};

const struct clkops clkops_omap2_iclk_dflt = {
    .enable     = omap2_dflt_clk_enable,
    .disable    = omap2_dflt_clk_disable,
    .allow_idle = omap2_clkt_iclk_allow_idle,
    .deny_idle  = omap2_clkt_iclk_deny_idle,
};

const struct clkops clkops_omap2_iclk_idle_only = {
    .allow_idle = omap2_clkt_iclk_allow_idle,
    .deny_idle  = omap2_clkt_iclk_deny_idle,
};

const struct clkops clkops_omap2_mdmclk_dflt_wait = {
    .enable     = omap2_dflt_clk_enable,
    .disable    = omap2_dflt_clk_disable,
    .find_companion = omap2_clk_dflt_find_companion,
    .find_idlest    = omap2_clk_dflt_find_idlest,
    .allow_idle = omap2_clkt_iclk_allow_idle,
    .deny_idle  = omap2_clkt_iclk_deny_idle,
};