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2874c5fd28
Based on 1 normalized pattern(s): 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 either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
88 lines
1.8 KiB
C
88 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* CLPS711X GPIO driver
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*
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* Copyright (C) 2012,2013 Alexander Shiyan <shc_work@mail.ru>
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*/
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/gpio/driver.h>
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#include <linux/platform_device.h>
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static int clps711x_gpio_probe(struct platform_device *pdev)
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{
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struct device_node *np = pdev->dev.of_node;
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void __iomem *dat, *dir;
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struct gpio_chip *gc;
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int err, id;
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if (!np)
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return -ENODEV;
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id = of_alias_get_id(np, "gpio");
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if ((id < 0) || (id > 4))
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return -ENODEV;
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gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL);
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if (!gc)
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return -ENOMEM;
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dat = devm_platform_ioremap_resource(pdev, 0);
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if (IS_ERR(dat))
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return PTR_ERR(dat);
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dir = devm_platform_ioremap_resource(pdev, 1);
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if (IS_ERR(dir))
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return PTR_ERR(dir);
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switch (id) {
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case 3:
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/* PORTD is inverted logic for direction register */
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err = bgpio_init(gc, &pdev->dev, 1, dat, NULL, NULL,
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NULL, dir, 0);
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break;
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default:
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err = bgpio_init(gc, &pdev->dev, 1, dat, NULL, NULL,
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dir, NULL, 0);
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break;
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}
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if (err)
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return err;
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switch (id) {
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case 4:
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/* PORTE is 3 lines only */
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gc->ngpio = 3;
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break;
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default:
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break;
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}
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gc->base = -1;
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gc->owner = THIS_MODULE;
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platform_set_drvdata(pdev, gc);
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return devm_gpiochip_add_data(&pdev->dev, gc, NULL);
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}
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static const struct of_device_id __maybe_unused clps711x_gpio_ids[] = {
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{ .compatible = "cirrus,ep7209-gpio" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, clps711x_gpio_ids);
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static struct platform_driver clps711x_gpio_driver = {
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.driver = {
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.name = "clps711x-gpio",
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.of_match_table = of_match_ptr(clps711x_gpio_ids),
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},
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.probe = clps711x_gpio_probe,
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};
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module_platform_driver(clps711x_gpio_driver);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>");
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MODULE_DESCRIPTION("CLPS711X GPIO driver");
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MODULE_ALIAS("platform:clps711x-gpio");
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