diff options
| author | Alexandre Courbot <acourbot@nvidia.com> | 2013-02-03 01:29:26 +0900 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2013-02-09 09:23:30 +0000 |
| commit | 125eef96f6cfadddbac8f6b9fccc9848988e7c6e (patch) | |
| tree | 70c2cf06b32ba24460df717381a4f53e63401afc /drivers/gpio | |
| parent | 65493e3ac429623df021e0859d97691f4b42615a (diff) | |
| download | linux-125eef96f6cfadddbac8f6b9fccc9848988e7c6e.tar.bz2 | |
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: Alexandre Courbot <acourbot@nvidia.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index c1d8f7bdcd8f..5a79cb955d9f 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -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) - continue; - - if (match(gpio_desc[i].chip, data)) { - chip = gpio_desc[i].chip; + list_for_each_entry(chip, &gpio_chips, list) + if (match(chip, data)) break; - } - } + + /* No match? */ + if (&chip->list == &gpio_chips) + chip = NULL; spin_unlock_irqrestore(&gpio_lock, flags); return chip; |