gpio15xx.c

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/*
 * OMAP15xx specific gpio init
 *
 * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
 *
 * Author:
 *  Charulatha V <[email protected]>
 *
 * 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.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/gpio.h>
#include <linux/platform_data/gpio-omap.h>

#define OMAP1_MPUIO_VBASE       OMAP1_MPUIO_BASE
#define OMAP1510_GPIO_BASE      0xFFFCE000

/* gpio1 */
static struct __initdata resource omap15xx_mpu_gpio_resources[] = {
    {
        .start  = OMAP1_MPUIO_VBASE,
        .end    = OMAP1_MPUIO_VBASE + SZ_2K - 1,
        .flags  = IORESOURCE_MEM,
    },
    {
        .start  = INT_MPUIO,
        .flags  = IORESOURCE_IRQ,
    },
};

static struct omap_gpio_reg_offs omap15xx_mpuio_regs = {
    .revision       = USHRT_MAX,
    .direction  = OMAP_MPUIO_IO_CNTL,
    .datain     = OMAP_MPUIO_INPUT_LATCH,
    .dataout    = OMAP_MPUIO_OUTPUT,
    .irqstatus  = OMAP_MPUIO_GPIO_INT,
    .irqenable  = OMAP_MPUIO_GPIO_MASKIT,
    .irqenable_inv  = true,
    .irqctrl    = OMAP_MPUIO_GPIO_INT_EDGE,
};

static struct __initdata omap_gpio_platform_data omap15xx_mpu_gpio_config = {
    .is_mpuio       = true,
    .bank_width     = 16,
    .bank_stride        = 1,
    .regs           = &omap15xx_mpuio_regs,
};

static struct platform_device omap15xx_mpu_gpio = {
    .name           = "omap_gpio",
    .id             = 0,
    .dev            = {
        .platform_data = &omap15xx_mpu_gpio_config,
    },
    .num_resources = ARRAY_SIZE(omap15xx_mpu_gpio_resources),
    .resource = omap15xx_mpu_gpio_resources,
};

/* gpio2 */
static struct __initdata resource omap15xx_gpio_resources[] = {
    {
        .start  = OMAP1510_GPIO_BASE,
        .end    = OMAP1510_GPIO_BASE + SZ_2K - 1,
        .flags  = IORESOURCE_MEM,
    },
    {
        .start  = INT_GPIO_BANK1,
        .flags  = IORESOURCE_IRQ,
    },
};

static struct omap_gpio_reg_offs omap15xx_gpio_regs = {
    .revision   = USHRT_MAX,
    .direction  = OMAP1510_GPIO_DIR_CONTROL,
    .datain     = OMAP1510_GPIO_DATA_INPUT,
    .dataout    = OMAP1510_GPIO_DATA_OUTPUT,
    .irqstatus  = OMAP1510_GPIO_INT_STATUS,
    .irqenable  = OMAP1510_GPIO_INT_MASK,
    .irqenable_inv  = true,
    .irqctrl    = OMAP1510_GPIO_INT_CONTROL,
    .pinctrl    = OMAP1510_GPIO_PIN_CONTROL,
};

static struct __initdata omap_gpio_platform_data omap15xx_gpio_config = {
    .bank_width     = 16,
    .regs                   = &omap15xx_gpio_regs,
};

static struct platform_device omap15xx_gpio = {
    .name           = "omap_gpio",
    .id             = 1,
    .dev            = {
        .platform_data = &omap15xx_gpio_config,
    },
    .num_resources = ARRAY_SIZE(omap15xx_gpio_resources),
    .resource = omap15xx_gpio_resources,
};

/*
 * omap15xx_gpio_init needs to be done before
 * machine_init functions access gpio APIs.
 * Hence omap15xx_gpio_init is a postcore_initcall.
 */
static int __init omap15xx_gpio_init(void)
{
    if (!cpu_is_omap15xx())
        return -EINVAL;

    platform_device_register(&omap15xx_mpu_gpio);
    platform_device_register(&omap15xx_gpio);

    return 0;
}
postcore_initcall(omap15xx_gpio_init);