Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
gpio: mmio: use new generic GPIO chip API
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/20250910-gpio-mmio-gpio-conv-part4-v2-14-f3d1a4c57124@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
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drivers/gpio/gpio-mmio.c
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drivers/gpio/gpio-mmio.c
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#include <linux/types.h>
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#include <linux/gpio/driver.h>
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#include <linux/gpio/generic.h>
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#include "gpiolib.h"
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static int bgpio_pdev_probe(struct platform_device *pdev)
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{
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struct gpio_generic_chip_config config;
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struct gpio_generic_chip *gen_gc;
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struct device *dev = &pdev->dev;
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struct resource *r;
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void __iomem *dat;
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unsigned long flags = 0;
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unsigned int base;
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int err;
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struct gpio_chip *gc;
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const char *label;
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r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dat");
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if (IS_ERR(dirin))
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return PTR_ERR(dirin);
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gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL);
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if (!gc)
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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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if (device_is_big_endian(dev))
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if (device_property_read_bool(dev, "no-output"))
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flags |= BGPIOF_NO_OUTPUT;
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err = bgpio_init(gc, dev, sz, dat, set, clr, dirout, dirin, flags);
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config = (struct gpio_generic_chip_config) {
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.dev = dev,
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.sz = sz,
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.dat = dat,
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.set = set,
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.clr = clr,
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.dirout = dirout,
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.dirin = dirin,
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.flags = flags,
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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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err = device_property_read_string(dev, "label", &label);
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if (!err)
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gc->label = label;
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gen_gc->gc.label = label;
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/*
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* This property *must not* be used in device-tree sources, it's only
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*/
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err = device_property_read_u32(dev, "gpio-mmio,base", &base);
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if (!err && base <= INT_MAX)
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gc->base = base;
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gen_gc->gc.base = base;
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platform_set_drvdata(pdev, gc);
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platform_set_drvdata(pdev, &gen_gc->gc);
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return devm_gpiochip_add_data(&pdev->dev, gc, NULL);
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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 platform_device_id bgpio_id_table[] = {