arch/arm/mach-omap1/gpio15xx.c

   1 /*
   2  * OMAP15xx specific gpio init
   3  *
   4  * Copyright (C) 2010 Texas Instruments Incorporated - http://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
  21 #define OMAP1_MPUIO_VBASE               OMAP1_MPUIO_BASE
  22 #define OMAP1510_GPIO_BASE              0xFFFCE000
  23
  24 /* gpio1 */
  25 static struct __initdata resource omap15xx_mpu_gpio_resources[] = {
  26         {
  27                 .start  = OMAP1_MPUIO_VBASE,
  28                 .end    = OMAP1_MPUIO_VBASE + SZ_2K - 1,
  29                 .flags  = IORESOURCE_MEM,
  30         },
  31         {
  32                 .start  = INT_MPUIO,
  33                 .flags  = IORESOURCE_IRQ,
  34         },
  35 };
  36
  37 static struct omap_gpio_reg_offs omap15xx_mpuio_regs = {
  38         .revision       = USHRT_MAX,
  39         .direction      = OMAP_MPUIO_IO_CNTL,
  40         .datain         = OMAP_MPUIO_INPUT_LATCH,
  41         .dataout        = OMAP_MPUIO_OUTPUT,
  42         .irqstatus      = OMAP_MPUIO_GPIO_INT,
  43         .irqenable      = OMAP_MPUIO_GPIO_MASKIT,
  44         .irqenable_inv  = true,
  45 };
  46
  47 static struct __initdata omap_gpio_platform_data omap15xx_mpu_gpio_config = {
  48         .virtual_irq_start      = IH_MPUIO_BASE,
  49         .bank_type              = METHOD_MPUIO,
  50         .bank_width             = 16,
  51         .bank_stride            = 1,
  52         .regs                   = &omap15xx_mpuio_regs,
  53 };
  54
  55 static struct platform_device omap15xx_mpu_gpio = {
  56         .name           = "omap_gpio",
  57         .id             = 0,
  58         .dev            = {
  59                 .platform_data = &omap15xx_mpu_gpio_config,
  60         },
  61         .num_resources = ARRAY_SIZE(omap15xx_mpu_gpio_resources),
  62         .resource = omap15xx_mpu_gpio_resources,
  63 };
  64
  65 /* gpio2 */
  66 static struct __initdata resource omap15xx_gpio_resources[] = {
  67         {
  68                 .start  = OMAP1510_GPIO_BASE,
  69                 .end    = OMAP1510_GPIO_BASE + SZ_2K - 1,
  70                 .flags  = IORESOURCE_MEM,
  71         },
  72         {
  73                 .start  = INT_GPIO_BANK1,
  74                 .flags  = IORESOURCE_IRQ,
  75         },
  76 };
  77
  78 static struct omap_gpio_reg_offs omap15xx_gpio_regs = {
  79         .revision       = USHRT_MAX,
  80         .direction      = OMAP1510_GPIO_DIR_CONTROL,
  81         .datain         = OMAP1510_GPIO_DATA_INPUT,
  82         .dataout        = OMAP1510_GPIO_DATA_OUTPUT,
  83         .irqstatus      = OMAP1510_GPIO_INT_STATUS,
  84         .irqenable      = OMAP1510_GPIO_INT_MASK,
  85         .irqenable_inv  = true,
  86 };
  87
  88 static struct __initdata omap_gpio_platform_data omap15xx_gpio_config = {
  89         .virtual_irq_start      = IH_GPIO_BASE,
  90         .bank_type              = METHOD_GPIO_1510,
  91         .bank_width             = 16,
  92         .regs                   = &omap15xx_gpio_regs,
  93 };
  94
  95 static struct platform_device omap15xx_gpio = {
  96         .name           = "omap_gpio",
  97         .id             = 1,
  98         .dev            = {
  99                 .platform_data = &omap15xx_gpio_config,
 100         },
 101         .num_resources = ARRAY_SIZE(omap15xx_gpio_resources),
 102         .resource = omap15xx_gpio_resources,
 103 };
 104
 105 /*
 106  * omap15xx_gpio_init needs to be done before
 107  * machine_init functions access gpio APIs.
 108  * Hence omap15xx_gpio_init is a postcore_initcall.
 109  */
 110 static int __init omap15xx_gpio_init(void)
 111 {
 112         if (!cpu_is_omap15xx())
 113                 return -EINVAL;
 114
 115         platform_device_register(&omap15xx_mpu_gpio);
 116         platform_device_register(&omap15xx_gpio);
 117
 118         gpio_bank_count = 2;
 119         return 0;
 120 }
 121 postcore_initcall(omap15xx_gpio_init);