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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; .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 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 ranges will be used to look up the appropriate pin controller by inspecting