LXR linux/drivers/gpio/gpio-iop.c

   1/*
   2 * arch/arm/plat-iop/gpio.c
   3 * GPIO handling for Intel IOP3xx processors.
   4 *
   5 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by
   9 * the Free Software Foundation; either version 2 of the License, or (at
  10 * your option) any later version.
  11 */
  12
  13#include <linux/err.h>
  14#include <linux/module.h>
  15#include <linux/gpio/driver.h>
  16#include <linux/platform_device.h>
  17
  18#define IOP3XX_GPOE     0x0000
  19#define IOP3XX_GPID     0x0004
  20#define IOP3XX_GPOD     0x0008
  21
  22static int iop3xx_gpio_probe(struct platform_device *pdev)
  23{
  24        struct resource *res;
  25        struct gpio_chip *gc;
  26        void __iomem *base;
  27        int err;
  28
  29        gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL);
  30        if (!gc)
  31                return -ENOMEM;
  32
  33        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  34        base = devm_ioremap_resource(&pdev->dev, res);
  35        if (IS_ERR(base))
  36                return PTR_ERR(base);
  37
  38        err = bgpio_init(gc, &pdev->dev, 1, base + IOP3XX_GPID,
  39                         base + IOP3XX_GPOD, NULL, NULL, base + IOP3XX_GPOE, 0);
  40        if (err)
  41                return err;
  42
  43        gc->base = 0;
  44        gc->owner = THIS_MODULE;
  45
  46        return devm_gpiochip_add_data(&pdev->dev, gc, NULL);
  47}
  48
  49static struct platform_driver iop3xx_gpio_driver = {
  50        .driver = {
  51                .name = "gpio-iop",
  52        },
  53        .probe = iop3xx_gpio_probe,
  54};
  55
  56static int __init iop3xx_gpio_init(void)
  57{
  58        return platform_driver_register(&iop3xx_gpio_driver);
  59}
  60arch_initcall(iop3xx_gpio_init);
  61