Commit 125eef96 authored by Alexandre Courbot's avatar Alexandre Courbot Committed by Grant Likely

gpiolib: use gpio_chips list in gpiochip_find

Using the GPIO chips list is much faster than parsing the entire GPIO
number space.
Signed-off-by: default avatarAlexandre Courbot <>
Reviewed-by: Linus Walleij's avatarLinus Walleij <>
Signed-off-by: default avatarGrant Likely <>
parent 65493e3a
......@@ -1195,20 +1195,17 @@ struct gpio_chip *gpiochip_find(void *data,
int (*match)(struct gpio_chip *chip,
void *data))
struct gpio_chip *chip = NULL;
struct gpio_chip *chip;
unsigned long flags;
int i;
spin_lock_irqsave(&gpio_lock, flags);
for (i = 0; i < ARCH_NR_GPIOS; i++) {
if (!gpio_desc[i].chip)
if (match(gpio_desc[i].chip, data)) {
chip = gpio_desc[i].chip;
list_for_each_entry(chip, &gpio_chips, list)
if (match(chip, data))
/* No match? */
if (&chip->list == &gpio_chips)
chip = NULL;
spin_unlock_irqrestore(&gpio_lock, flags);
return chip;
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