arch/arm/plat-mxc/iomux-v3.c

/*
 * Copyright 2004-2006 Freescale Semiconductor, Inc. All Rights Reserved.
 * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
 * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
 *                       <armlinux@phytec.de>
 *
 * 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; either version 2
 * of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/gpio.h>

#include <mach/hardware.h>
#include <asm/mach/map.h>
#include <mach/iomux-v3.h>

static void __iomem *base;

/*
 * configures a single pad in the iomuxer
 */
int mxc_iomux_v3_setup_pad(iomux_v3_cfg_t *pad)
{
	if (MUX_CTRL_OFS(pad))
		__raw_writel(MUX_MODE(pad), base + MUX_CTRL_OFS(pad));

	if (MUX_SELECT_INPUT_OFS(pad))
		__raw_writel(MUX_SELECT_INPUT(pad),
			base + MUX_SELECT_INPUT(pad));

	if (!(MUX_PAD_CTRL(pad) & NO_PAD_CTRL) && MUX_PAD_CTRL_OFS(pad))
		__raw_writel(MUX_PAD_CTRL(pad), base + MUX_PAD_CTRL_OFS(pad));
	return 0;
}
EXPORT_SYMBOL(mxc_iomux_v3_setup_pad);

int mxc_iomux_v3_setup_multiple_pads(iomux_v3_cfg_t *pad_list, unsigned count)
{
	iomux_v3_cfg_t *p = pad_list;
	int i;
	int ret;

	for (i = 0; i < count; i++) {
		ret = mxc_iomux_v3_setup_pad(p);
		if (ret)
			return ret;
		p++;
	}
	return 0;
}
EXPORT_SYMBOL(mxc_iomux_v3_setup_multiple_pads);

void mxc_iomux_v3_init(void __iomem *iomux_v3_base)
{
	base = iomux_v3_base;
}