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fd0f0d1a1e
Convert the driver to using the new generic GPIO chip interfaces from linux/gpio/generic.h. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20250702-gpio-mmio-rework-v2-4-6b77aab684d8@linaro.org Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
92 lines
1.9 KiB
C
92 lines
1.9 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/gpio/generic.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 gpio_generic_chip_config config = { };
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struct device_node *np = pdev->dev.of_node;
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struct gpio_generic_chip *gen_gc;
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void __iomem *dat, *dir;
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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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gen_gc = devm_kzalloc(&pdev->dev, sizeof(*gen_gc), GFP_KERNEL);
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if (!gen_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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config.dev = &pdev->dev;
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config.sz = 1;
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config.dat = dat;
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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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config.dirin = dir;
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break;
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default:
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config.dirout = dir;
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break;
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}
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err = gpio_generic_chip_init(gen_gc, &config);
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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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gen_gc->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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gen_gc->gc.base = -1;
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gen_gc->gc.owner = THIS_MODULE;
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return devm_gpiochip_add_data(&pdev->dev, &gen_gc->gc, NULL);
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}
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static const struct of_device_id 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 = 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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