// SPDX-License-Identifier: GPL-2.0-only
/*
 * linux/arch/arm/mach-pxa/mfp.c
 *
 * PXA3xx Multi-Function Pin Support
 *
 * Copyright (C) 2007 Marvell Internation Ltd.
 *
 * 2007-08-21: eric miao <eric.miao@marvell.com>
 *             initial version
 */

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

#include "mfp-pxa3xx.h"
#include "pxa3xx-regs.h"

#ifdef CONFIG_PM
/*
 * Configure the MFPs appropriately for suspend/resume.
 * FIXME: this should probably depend on which system state we're
 * entering - for instance, we might not want to place MFP pins in
 * a pull-down mode if they're an active low chip select, and we're
 * just entering standby.
 */
static int pxa3xx_mfp_suspend(void *data)
{
        mfp_config_lpm();
        return 0;
}

static void pxa3xx_mfp_resume(void *data)
{
        mfp_config_run();

        /* clear RDH bit when MFP settings are restored
         *
         * NOTE: the last 3 bits DxS are write-1-to-clear so carefully
         * preserve them here in case they will be referenced later
         */
        ASCR &= ~(ASCR_RDH | ASCR_D1S | ASCR_D2S | ASCR_D3S);
}
#else
#define pxa3xx_mfp_suspend      NULL
#define pxa3xx_mfp_resume       NULL
#endif

static const struct syscore_ops pxa3xx_mfp_syscore_ops = {
        .suspend        = pxa3xx_mfp_suspend,
        .resume         = pxa3xx_mfp_resume,
};

struct syscore pxa3xx_mfp_syscore = {
        .ops = &pxa3xx_mfp_syscore_ops,
};