src/soc/qualcomm/ipq806x/gpio.c

/*
 * Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved.
 *
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 * modification, are permitted provided that the following conditions
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 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
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 *    may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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 */

#include <asm/arch-ipq806x/iomap.h>
#include <asm/arch-ipq806x/gpio.h>
#include <asm/io.h>

/*******************************************************
Function description: configure GPIO functinality
Arguments :
unsigned int gpio - Gpio number
unsigned int func - Functionality number
unsigned int dir  - direction 0- i/p, 1- o/p
unsigned int pull - pull up/down, no pull range(0-3)
unsigned int drvstr - range (0 - 7)-> (2- 16)MA steps of 2
unsigned int enable - 1 - Disable, 2- Enable.

Return : None
*******************************************************/


void gpio_tlmm_config(unsigned int gpio, unsigned int func,
                      unsigned int dir, unsigned int pull,
                      unsigned int drvstr, unsigned int enable)
{
        unsigned int val = 0;
        val |= pull;
        val |= func << 2;
        val |= drvstr << 6;
        val |= enable << 9;
        unsigned int *addr = (unsigned int *)GPIO_CONFIG_ADDR(gpio);
        writel(val, addr);
        return;
}