diff options
| author | Grant Likely <grant.likely@secretlab.ca> | 2013-02-12 17:48:37 +0000 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2013-02-13 10:11:53 +0000 |
| commit | e80beb27d2f81a1c3c8887e0e0a82d77bb392d28 (patch) | |
| tree | 1f81c7ffb20b23d5f7a157e996fbb176779af88a /drivers/gpio/gpiolib-of.c | |
| parent | bd69f73f2c81eed9a398708b8c4bb3409ba1b0f9 (diff) | |
| download | linux-e80beb27d2f81a1c3c8887e0e0a82d77bb392d28.tar.bz2 | |
gpio: Make of_count_named_gpios() use new of_count_phandle_with_args()
This patch replaces the horribly coded of_count_named_gpios() with a
call to of_count_phandle_with_args() which is far more efficient. This
also changes the return value of of_gpio_count() & of_gpio_named_count()
from 'unsigned int' to 'int' so that it can return an error code. All
the users of that function are fixed up to correctly handle a negative
return value.
v2: Split GPIO portion into a separate patch
Tested-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Rob Herring <rob.herring@calxeda.com>
Diffstat (limited to 'drivers/gpio/gpiolib-of.c')
| -rw-r--r-- | drivers/gpio/gpiolib-of.c | 35 |
1 files changed, 0 insertions, 35 deletions
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index d542a141811a..dd8a2129222f 100644 --- a/drivers/gpio/gpiolib-of.c +++ b/drivers/gpio/gpiolib-of.c @@ -89,41 +89,6 @@ int of_get_named_gpio_flags(struct device_node *np, const char *propname, EXPORT_SYMBOL(of_get_named_gpio_flags); /** - * of_gpio_named_count - Count GPIOs for a device - * @np: device node to count GPIOs for - * @propname: property name containing gpio specifier(s) - * - * The function returns the count of GPIOs specified for a node. - * - * Note that the empty GPIO specifiers counts too. For example, - * - * gpios = <0 - * &pio1 1 2 - * 0 - * &pio2 3 4>; - * - * defines four GPIOs (so this function will return 4), two of which - * are not specified. - */ -unsigned int of_gpio_named_count(struct device_node *np, const char* propname) -{ - unsigned int cnt = 0; - - do { - int ret; - - ret = of_parse_phandle_with_args(np, propname, "#gpio-cells", - cnt, NULL); - /* A hole in the gpios = <> counts anyway. */ - if (ret < 0 && ret != -EEXIST) - break; - } while (++cnt); - - return cnt; -} -EXPORT_SYMBOL(of_gpio_named_count); - -/** * of_gpio_simple_xlate - translate gpio_spec to the GPIO number and flags * @gc: pointer to the gpio_chip structure * @np: device node of the GPIO chip |