/*
   * linux/arch/arm/plat-omap/mux.c
   *
   * Utility to set the Omap MUX and PULL_DWN registers from a table in mux.h
   *

   * Copyright (C) 2003 - 2008 Nokia Corporation

   *

   * Written by Tony Lindgren

   *
   * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
   *
   */

  #include <linux/module.h>
  #include <linux/init.h>

  #include <linux/kernel.h>

  #include <linux/io.h>

  #include <asm/system.h>

  #include <linux/spinlock.h>

  #include <plat/mux.h>

  
  #ifdef CONFIG_OMAP_MUX

  static struct omap_mux_cfg *mux_cfg;

  int __init omap_mux_register(struct omap_mux_cfg *arch_mux_cfg)

  {

  	if (!arch_mux_cfg || !arch_mux_cfg->pins || arch_mux_cfg->size == 0
  			|| !arch_mux_cfg->cfg_reg) {
  		printk(KERN_ERR "Invalid pin table
  ");
  		return -EINVAL;
  	}
  
  	mux_cfg = arch_mux_cfg;

  
  	return 0;
  }

  /*
   * Sets the Omap MUX and PULL_DWN registers based on the table
   */

  int __init_or_module omap_cfg_reg(const unsigned long index)

  {

  	struct pin_config *reg;

  	if (!cpu_class_is_omap1()) {

  		printk(KERN_ERR "mux: Broken omap_cfg_reg(%lu) entry
  ",
  				index);
  		WARN_ON(1);
  		return -EINVAL;
  	}

  	if (mux_cfg == NULL) {
  		printk(KERN_ERR "Pin mux table not initialized
  ");
  		return -ENODEV;
  	}

  	if (index >= mux_cfg->size) {

  		printk(KERN_ERR "Invalid pin mux index: %lu (%lu)
  ",

  		       index, mux_cfg->size);

  		dump_stack();
  		return -ENODEV;

  	}

  	reg = (struct pin_config *)&mux_cfg->pins[index];

  	if (!mux_cfg->cfg_reg)
  		return -ENODEV;

  	return mux_cfg->cfg_reg(reg);

  }

  EXPORT_SYMBOL(omap_cfg_reg);

  #else
  #define omap_mux_init() do {} while(0)
  #define omap_cfg_reg(x)	do {} while(0)

  #endif	/* CONFIG_OMAP_MUX */