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gpio.c

/*
 * Coldfire generic GPIO support
 *
 * (C) Copyright 2009, Steven King <sfking@fdwdc.com>
 *
 * 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; version 2 of the License.
 *
 * 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.
*/

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

#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#include <asm/mcfgpio.h>

static struct mcf_gpio_chip mcf_gpio_chips[] = {
      {
            .gpio_chip              = {
                  .label                  = "GPIO0",
                  .request          = mcf_gpio_request,
                  .free             = mcf_gpio_free,
                  .direction_input  = mcf_gpio_direction_input,
                  .direction_output = mcf_gpio_direction_output,
                  .get              = mcf_gpio_get_value,
                  .set              = mcf_gpio_set_value,
                  .ngpio                  = 32,
            },
            .pddr                   = MCFSIM2_GPIOENABLE,
            .podr                   = MCFSIM2_GPIOWRITE,
            .ppdr                   = MCFSIM2_GPIOREAD,
      },
      {
            .gpio_chip              = {
                  .label                  = "GPIO1",
                  .request          = mcf_gpio_request,
                  .free             = mcf_gpio_free,
                  .direction_input  = mcf_gpio_direction_input,
                  .direction_output = mcf_gpio_direction_output,
                  .get              = mcf_gpio_get_value,
                  .set              = mcf_gpio_set_value,
                  .base             = 32,
                  .ngpio                  = 32,
            },
            .pddr                   = MCFSIM2_GPIO1ENABLE,
            .podr                   = MCFSIM2_GPIO1WRITE,
            .ppdr                   = MCFSIM2_GPIO1READ,
      },
};

static int __init mcf_gpio_init(void)
{
      unsigned i = 0;
      while (i < ARRAY_SIZE(mcf_gpio_chips))
            (void)gpiochip_add((struct gpio_chip *)&mcf_gpio_chips[i++]);
      return 0;
}

core_initcall(mcf_gpio_init);

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