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authorGrant Likely <grant.likely@secretlab.ca>2013-02-12 17:48:37 +0000
committerGrant Likely <grant.likely@secretlab.ca>2013-02-13 10:11:53 +0000
commite80beb27d2f81a1c3c8887e0e0a82d77bb392d28 (patch)
tree1f81c7ffb20b23d5f7a157e996fbb176779af88a /drivers/gpio
parentbd69f73f2c81eed9a398708b8c4bb3409ba1b0f9 (diff)
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')
-rw-r--r--drivers/gpio/gpiolib-of.c35
1 files changed, 0 insertions, 35 deletions
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index d542a141811..dd8a2129222 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