On Sun, Mar 22, 2015 at 11:00:59AM +0100, Uwe Kleine-K?nig wrote:

Hello,

for a machine I want to configure a pin that is actually not connected
to minimize floating. (I think this is sensible, isn't it?)

For the pinctrl I can use a hog group of the pinctrl device. At least
one of the pins doesn't have a pullup/pulldown configuration though, so
I want to mux it to its gpio function and set the gpio to output and the
desired value.

Is there something nicer than defining an always-on regulator with gpios
= <&gpio4 3 0> to accomplish that without additional code?

For the archive: Yes, there is something nicer in the meantime:

Since commit f625d4601759 (gpio: add GPIO hogging mechanism) which is
included in v4.1-rc1 you can do something like

&gpio3 {
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_gpio3hog>;

        ext-armclk {
                gpio-hog;
                gpios = <15 0>;
                output-low;
        };
};

in the devicetree (here for an i.MX25).

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-K?nig            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |