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gpiolib: fix find_chip_by_name()

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find_chip_by_name() was incorrectly implemented by using
gpio_lookup_list instead of gpiod_chips to iterate through all the
registered GPIO controllers. This patch reimplements it by using
gpiochip_find() with a custom search function, which simplifies the code
on top of fixing the mistake.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Alexandre Courbot 2013-11-16 21:39:32 +09:00 committed by Linus Walleij
parent fd8e198cfc
commit 79697ef94c
1 changed files with 12 additions and 17 deletions
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29
drivers/gpio/gpiolib.c
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@ -1308,6 +1308,18 @@ struct gpio_chip *gpiochip_find(void *data,
}
EXPORT_SYMBOL_GPL(gpiochip_find);
static int gpiochip_match_name(struct gpio_chip *chip, void *data)
{
const char *name = data;
return !strcmp(chip->label, name);
}
static struct gpio_chip *find_chip_by_name(const char *name)
{
return gpiochip_find((void *)name, gpiochip_match_name);
}
#ifdef CONFIG_PINCTRL
/**
@ -2260,23 +2272,6 @@ void gpiod_add_table(struct gpiod_lookup *table, size_t size)
mutex_unlock(&gpio_lookup_lock);
}
/*
* Caller must have a acquired gpio_lookup_lock
*/
static struct gpio_chip *find_chip_by_name(const char *name)
{
struct gpio_chip *chip = NULL;
list_for_each_entry(chip, &gpio_lookup_list, list) {
if (chip->label == NULL)
continue;
if (!strcmp(chip->label, name))
break;
}
return chip;
}
#ifdef CONFIG_OF
static struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
unsigned int idx, unsigned long *flags)