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The (typeof(foo)) construct is unusual in the kernel, use a more typical syntax by explicitly spelling out the type. Link: https://lore.kernel.org/all/20250909-gpio-mmio-gpio-conv-part4-v1-13-9f723dc3524a@linaro.org/ Suggested-by: Andy Shevchenko <andriy.shevchenko@intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Link: https://lore.kernel.org/r/20250910-make-compound-literals-normal-again-v1-3-076ee7738a0b@linaro.org Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
78 lines
2 KiB
C
78 lines
2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* GPIO driver for the TS-4800 board
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*
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* Copyright (c) 2016 - Savoir-faire Linux
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*/
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#include <linux/gpio/driver.h>
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#include <linux/gpio/generic.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/property.h>
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#define DEFAULT_PIN_NUMBER 16
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#define INPUT_REG_OFFSET 0x00
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#define OUTPUT_REG_OFFSET 0x02
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#define DIRECTION_REG_OFFSET 0x04
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static int ts4800_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 *dev = &pdev->dev;
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struct gpio_generic_chip *chip;
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void __iomem *base_addr;
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int retval;
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u32 ngpios;
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chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
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if (!chip)
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return -ENOMEM;
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base_addr = devm_platform_ioremap_resource(pdev, 0);
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if (IS_ERR(base_addr))
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return PTR_ERR(base_addr);
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retval = device_property_read_u32(dev, "ngpios", &ngpios);
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if (retval == -EINVAL)
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ngpios = DEFAULT_PIN_NUMBER;
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else if (retval)
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return retval;
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config = (struct gpio_generic_chip_config) {
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.dev = dev,
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.sz = 2,
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.dat = base_addr + INPUT_REG_OFFSET,
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.set = base_addr + OUTPUT_REG_OFFSET,
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.dirout = base_addr + DIRECTION_REG_OFFSET,
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};
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retval = gpio_generic_chip_init(chip, &config);
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if (retval)
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return dev_err_probe(dev, retval,
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"failed to initialize the generic GPIO chip\n");
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chip->gc.ngpio = ngpios;
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return devm_gpiochip_add_data(dev, &chip->gc, NULL);
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}
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static const struct of_device_id ts4800_gpio_of_match[] = {
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{ .compatible = "technologic,ts4800-gpio", },
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{},
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};
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MODULE_DEVICE_TABLE(of, ts4800_gpio_of_match);
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static struct platform_driver ts4800_gpio_driver = {
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.driver = {
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.name = "ts4800-gpio",
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.of_match_table = ts4800_gpio_of_match,
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},
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.probe = ts4800_gpio_probe,
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};
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module_platform_driver_probe(ts4800_gpio_driver, ts4800_gpio_probe);
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MODULE_AUTHOR("Julien Grossholtz <julien.grossholtz@savoirfairelinux.com>");
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MODULE_DESCRIPTION("TS4800 FPGA GPIO driver");
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MODULE_LICENSE("GPL v2");
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