From: Vladimir Zapolskiy Date: Thu, 8 Sep 2016 01:48:16 +0000 (+0300) Subject: gpio: mxc: add generic gpio request/free callbacks to pinctrl X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=4c806c9891100e80cbd6be654de7c8ca6f6be3ef;p=openwrt%2Fstaging%2Fblogic.git gpio: mxc: add generic gpio request/free callbacks to pinctrl If a GPIO controller description in board DTB contains information about mappings between GPIOs and pads under IOMUX control use it to request and free GPIOs with respect to pinctrl/pinmux subsystems. One of immediate positive functional changes is inability to request non-existing GPIOs, i.e. if there is no pad such. Also pinctrl/pinmux may now properly account pads occupied by requested GPIOs. The change has no effect, if "gpio-ranges" property is not found including the case if a board has no DTB firmware. Signed-off-by: Vladimir Zapolskiy Acked-by: Shawn Guo Signed-off-by: Linus Walleij --- diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c index 1fdd5d804b5b..e38989a4fa0c 100644 --- a/drivers/gpio/gpio-mxc.c +++ b/drivers/gpio/gpio-mxc.c @@ -458,6 +458,11 @@ static int mxc_gpio_probe(struct platform_device *pdev) if (err) goto out_bgio; + if (of_property_read_bool(np, "gpio-ranges")) { + port->gc.request = gpiochip_generic_request; + port->gc.free = gpiochip_generic_free; + } + port->gc.to_irq = mxc_gpio_to_irq; port->gc.base = (pdev->id < 0) ? of_alias_get_id(np, "gpio") * 32 : pdev->id * 32;