From: Barry Song <Baohua.Song@csr.com>
Date: Sat, 11 Jan 2014 08:48:43 +0000 (+0800)
Subject: pinctrl: sirf: put gpio interrupt pin into input status automatically
X-Git-Tag: v3.14-rc1~144^2~9
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b07ddcdcb28764d4deb26933d803cb38c370f01b;p=pandora-kernel.git

pinctrl: sirf: put gpio interrupt pin into input status automatically

busses like i2c, spi and so on can parse the virq of their subnode automatically by
irq_of_parse_and_map(). for example, i2c will do that in of_i2c_register_devices().
people can put hwirq number attached to a gpio controller in dts, and drivers can
directly request the parsed virq.

for example, for an i2c client as below,
tangoc-ts@5c{
	compatible = "pixcir,tangoc-ts";
	interrupt-parent = <&gpio>;
	interrupts = <3 0>;
	reg = <0x5c>;
};
in i2c client probe(), it will request_irq(client->irq, ...) without
calling gpio_direction_input().
so here when we set irq type, we also put the pin to input direction.

Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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