LXR linux/arch/arm/mach-omap1/gpio15xx.c

   1/*
   2 * OMAP15xx specific gpio init
   3 *
   4 * Copyright (C) 2010 Texas Instruments Incorporated - https://www.ti.com/
   5 *
   6 * Author:
   7 *      Charulatha V <charu@ti.com>
   8 *
   9 * This program is free software; you can redistribute it and/or
  10 * modify it under the terms of the GNU General Public License as
  11 * published by the Free Software Foundation version 2.
  12 *
  13 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  14 * kind, whether express or implied; without even the implied warranty
  15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 */
  18
  19#include <linux/gpio.h>
  20#include <linux/platform_data/gpio-omap.h>
  21
  22#include <mach/irqs.h>
  23
  24#define OMAP1_MPUIO_VBASE               OMAP1_MPUIO_BASE
  25#define OMAP1510_GPIO_BASE              0xFFFCE000
  26
  27/* gpio1 */
  28static struct resource omap15xx_mpu_gpio_resources[] = {
  29        {
  30                .start  = OMAP1_MPUIO_VBASE,
  31                .end    = OMAP1_MPUIO_VBASE + SZ_2K - 1,
  32                .flags  = IORESOURCE_MEM,
  33        },
  34        {
  35                .start  = INT_MPUIO,
  36                .flags  = IORESOURCE_IRQ,
  37        },
  38};
  39
  40static struct omap_gpio_reg_offs omap15xx_mpuio_regs = {
  41        .revision       = USHRT_MAX,
  42        .direction      = OMAP_MPUIO_IO_CNTL,
  43        .datain         = OMAP_MPUIO_INPUT_LATCH,
  44        .dataout        = OMAP_MPUIO_OUTPUT,
  45        .irqstatus      = OMAP_MPUIO_GPIO_INT,
  46        .irqenable      = OMAP_MPUIO_GPIO_MASKIT,
  47        .irqenable_inv  = true,
  48        .irqctrl        = OMAP_MPUIO_GPIO_INT_EDGE,
  49};
  50
  51static struct omap_gpio_platform_data omap15xx_mpu_gpio_config = {
  52        .is_mpuio               = true,
  53        .bank_width             = 16,
  54        .bank_stride            = 1,
  55        .regs                   = &omap15xx_mpuio_regs,
  56};
  57
  58static struct platform_device omap15xx_mpu_gpio = {
  59        .name           = "omap_gpio",
  60        .id             = 0,
  61        .dev            = {
  62                .platform_data = &omap15xx_mpu_gpio_config,
  63        },
  64        .num_resources = ARRAY_SIZE(omap15xx_mpu_gpio_resources),
  65        .resource = omap15xx_mpu_gpio_resources,
  66};
  67
  68/* gpio2 */
  69static struct resource omap15xx_gpio_resources[] = {
  70        {
  71                .start  = OMAP1510_GPIO_BASE,
  72                .end    = OMAP1510_GPIO_BASE + SZ_2K - 1,
  73                .flags  = IORESOURCE_MEM,
  74        },
  75        {
  76                .start  = INT_GPIO_BANK1,
  77                .flags  = IORESOURCE_IRQ,
  78        },
  79};
  80
  81static struct omap_gpio_reg_offs omap15xx_gpio_regs = {
  82        .revision       = USHRT_MAX,
  83        .direction      = OMAP1510_GPIO_DIR_CONTROL,
  84        .datain         = OMAP1510_GPIO_DATA_INPUT,
  85        .dataout        = OMAP1510_GPIO_DATA_OUTPUT,
  86        .irqstatus      = OMAP1510_GPIO_INT_STATUS,
  87        .irqenable      = OMAP1510_GPIO_INT_MASK,
  88        .irqenable_inv  = true,
  89        .irqctrl        = OMAP1510_GPIO_INT_CONTROL,
  90        .pinctrl        = OMAP1510_GPIO_PIN_CONTROL,
  91};
  92
  93static struct omap_gpio_platform_data omap15xx_gpio_config = {
  94        .bank_width             = 16,
  95        .regs                   = &omap15xx_gpio_regs,
  96};
  97
  98static struct platform_device omap15xx_gpio = {
  99        .name           = "omap_gpio",
 100        .id             = 1,
 101        .dev            = {
 102                .platform_data = &omap15xx_gpio_config,
 103        },
 104        .num_resources = ARRAY_SIZE(omap15xx_gpio_resources),
 105        .resource = omap15xx_gpio_resources,
 106};
 107
 108/*
 109 * omap15xx_gpio_init needs to be done before
 110 * machine_init functions access gpio APIs.
 111 * Hence omap15xx_gpio_init is a postcore_initcall.
 112 */
 113static int __init omap15xx_gpio_init(void)
 114{
 115        if (!cpu_is_omap15xx())
 116                return -EINVAL;
 117
 118        platform_device_register(&omap15xx_mpu_gpio);
 119        platform_device_register(&omap15xx_gpio);
 120
 121        return 0;
 122}
 123postcore_initcall(omap15xx_gpio_init);
 124