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gpio: don't override irq_*_resources() callbacks

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If the driver has specified its own irq_{request/release}_resources()
functions, don't override them.  The gpio-etraxfs driver will use this.

Signed-off-by: Rabin Vincent <rabin@rab.in>
[Added a small comment blurb]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Rabin Vincent 2015-07-31 14:48:56 +02:00 committed by Linus Walleij
parent 505936131e
commit 8b67a1f0ad
1 changed files with 10 additions and 2 deletions
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12
drivers/gpio/gpiolib.c
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@ -641,8 +641,16 @@ int gpiochip_irqchip_add(struct gpio_chip *gpiochip,
gpiochip->irqchip = NULL;
return -EINVAL;
}
irqchip->irq_request_resources = gpiochip_irq_reqres;
irqchip->irq_release_resources = gpiochip_irq_relres;
/*
* It is possible for a driver to override this, but only if the
* alternative functions are both implemented.
*/
if (!irqchip->irq_request_resources &&
!irqchip->irq_release_resources) {
irqchip->irq_request_resources = gpiochip_irq_reqres;
irqchip->irq_release_resources = gpiochip_irq_relres;
}
/*
* Prepare the mapping since the irqchip shall be orthogonal to