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

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * arch/arm/plat-iop/gpio.c
   4 * GPIO handling for Intel IOP3xx processors.
   5 *
   6 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
   7 */
   8
   9#include <linux/err.h>
  10#include <linux/module.h>
  11#include <linux/gpio/driver.h>
  12#include <linux/platform_device.h>
  13
  14#define IOP3XX_GPOE     0x0000
  15#define IOP3XX_GPID     0x0004
  16#define IOP3XX_GPOD     0x0008
  17
  18static int iop3xx_gpio_probe(struct platform_device *pdev)
  19{
  20        struct gpio_chip *gc;
  21        void __iomem *base;
  22        int err;
  23
  24        gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL);
  25        if (!gc)
  26                return -ENOMEM;
  27
  28        base = devm_platform_ioremap_resource(pdev, 0);
  29        if (IS_ERR(base))
  30                return PTR_ERR(base);
  31
  32        err = bgpio_init(gc, &pdev->dev, 1, base + IOP3XX_GPID,
  33                         base + IOP3XX_GPOD, NULL, NULL, base + IOP3XX_GPOE, 0);
  34        if (err)
  35                return err;
  36
  37        gc->base = 0;
  38        gc->owner = THIS_MODULE;
  39        gc->label = "gpio-iop";
  40
  41        return devm_gpiochip_add_data(&pdev->dev, gc, NULL);
  42}
  43
  44static struct platform_driver iop3xx_gpio_driver = {
  45        .driver = {
  46                .name = "gpio-iop",
  47        },
  48        .probe = iop3xx_gpio_probe,
  49};
  50
  51static int __init iop3xx_gpio_init(void)
  52{
  53        return platform_driver_register(&iop3xx_gpio_driver);
  54}
  55arch_initcall(iop3xx_gpio_init);
  56
  57MODULE_DESCRIPTION("GPIO handling for Intel IOP3xx processors");
  58MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
  59MODULE_LICENSE("GPL");
  60