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pinctrl: add documentation for pinctrl_get_group_pins()

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This patch adds a short description of how to use the newly added
pinctrl_get_group_pins function to the pinctrl documentation.

Signed-off-by: Christian Ruppert <christian.ruppert@abilis.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Christian Ruppert 2013-10-16 14:56:54 +02:00 committed by Linus Walleij
parent 5a92750133
commit fe61052ae9
1 changed files with 6 additions and 1 deletions
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7
Documentation/pinctrl.txt
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@ -358,7 +358,12 @@ static struct pinctrl_gpio_range gpio_range = {
.gc = &chip;
};
In this case the pin_base property will be ignored.
In this case the pin_base property will be ignored. If the name of a pin
group is known, the pins and npins elements of the above structure can be
initialised using the function pinctrl_get_group_pins(), e.g. for pin
group "foo":
pinctrl_get_group_pins(pctl, "foo", &gpio_range.pins, &gpio_range.npins);
When GPIO-specific functions in the pin control subsystem are called, these
ranges will be used to look up the appropriate pin controller by inspecting