79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
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/*
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* Copyright 2004-2006 Freescale Semiconductor, Inc. All Rights Reserved.
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* Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
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* Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
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* <armlinux@phytec.de>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/gpio.h>
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#include <asm/mach/map.h>
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#include "hardware.h"
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#include "iomux-v3.h"
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static void __iomem *base;
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/*
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* configures a single pad in the iomuxer
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*/
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int mxc_iomux_v3_setup_pad(iomux_v3_cfg_t pad)
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{
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u32 mux_ctrl_ofs = (pad & MUX_CTRL_OFS_MASK) >> MUX_CTRL_OFS_SHIFT;
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u32 mux_mode = (pad & MUX_MODE_MASK) >> MUX_MODE_SHIFT;
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u32 sel_input_ofs = (pad & MUX_SEL_INPUT_OFS_MASK) >> MUX_SEL_INPUT_OFS_SHIFT;
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u32 sel_input = (pad & MUX_SEL_INPUT_MASK) >> MUX_SEL_INPUT_SHIFT;
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u32 pad_ctrl_ofs = (pad & MUX_PAD_CTRL_OFS_MASK) >> MUX_PAD_CTRL_OFS_SHIFT;
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u32 pad_ctrl = (pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT;
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if (mux_ctrl_ofs)
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imx_writel(mux_mode, base + mux_ctrl_ofs);
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if (sel_input_ofs)
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imx_writel(sel_input, base + sel_input_ofs);
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if (!(pad_ctrl & NO_PAD_CTRL) && pad_ctrl_ofs)
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imx_writel(pad_ctrl, base + pad_ctrl_ofs);
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return 0;
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}
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int mxc_iomux_v3_setup_multiple_pads(const iomux_v3_cfg_t *pad_list,
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unsigned count)
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{
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const iomux_v3_cfg_t *p = pad_list;
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int i;
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int ret;
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for (i = 0; i < count; i++) {
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ret = mxc_iomux_v3_setup_pad(*p);
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if (ret)
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return ret;
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p++;
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}
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return 0;
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}
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void mxc_iomux_v3_init(void __iomem *iomux_v3_base)
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{
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base = iomux_v3_base;
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}
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