Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
gpiolib: provide gpio_device_to_device()
There are users in the kernel who need to retrieve the address of the
struct device backing the GPIO device. Currently they needlessly poke in
the internals of GPIOLIB. Add a dedicated getter function.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Peter Rosin <peda@axentia.se>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
+19
+17
drivers/gpio/gpiolib.c
+17
drivers/gpio/gpiolib.c
···
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}
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EXPORT_SYMBOL_GPL(gpio_device_put);
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/**
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* gpio_device_to_device() - Retrieve the address of the underlying struct
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* device.
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* @gdev: GPIO device for which to return the address.
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*
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* This does not increase the reference count of the GPIO device nor the
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* underlying struct device.
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*
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* Returns:
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* Address of struct device backing this GPIO device.
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*/
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struct device *gpio_device_to_device(struct gpio_device *gdev)
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{
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return &gdev->dev;
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}
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EXPORT_SYMBOL_GPL(gpio_device_to_device);
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#ifdef CONFIG_GPIOLIB_IRQCHIP
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/*
+2
include/linux/gpio/driver.h
+2
include/linux/gpio/driver.h
···
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DEFINE_FREE(gpio_device_put, struct gpio_device *,
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if (IS_ERR_OR_NULL(_T)) gpio_device_put(_T));
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struct device *gpio_device_to_device(struct gpio_device *gdev);
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bool gpiochip_line_is_irq(struct gpio_chip *gc, unsigned int offset);
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int gpiochip_reqres_irq(struct gpio_chip *gc, unsigned int offset);
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void gpiochip_relres_irq(struct gpio_chip *gc, unsigned int offset);