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gpio: rewrite gpiochip_offset_to_desc()

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gpiochip_offset_to_desc() was using gpio_to_desc(), which directly
addresses the global GPIO array we are hoping to get rid of someday.
Reimplement it using the descriptor array of the chip itself, after
checking the requested offset is within the valid bounds of the chip.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Alexandre Courbot 2013-12-03 12:31:11 +09:00 committed by Linus Walleij
parent a87854da2c
commit b7d0a28a9f
1 changed files with 3 additions and 2 deletions
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5
drivers/gpio/gpiolib.c
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@ -150,9 +150,10 @@ EXPORT_SYMBOL_GPL(gpio_to_desc);
static struct gpio_desc *gpiochip_offset_to_desc(struct gpio_chip *chip,
unsigned int offset)
{
unsigned int gpio = chip->base + offset;
if (offset >= chip->ngpio)
return ERR_PTR(-EINVAL);
return gpio_to_desc(gpio);
return &chip->desc[offset];
}
/**