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authorVladimir Zapolskiy <vladimir_zapolskiy@mentor.com>2016-09-08 03:48:16 +0200
committerLinus Walleij <linus.walleij@linaro.org>2016-09-12 14:28:59 +0200
commit4c806c9891100e80cbd6be654de7c8ca6f6be3ef (patch)
tree1d3382c859b48963d136519b00cbed5b86d0f1b4 /drivers/gpio/gpio-mxc.c
parentgpio: mxc: shift gpio_mxc_init() to subsys_initcall level (diff)
downloadlinux-4c806c9891100e80cbd6be654de7c8ca6f6be3ef.tar.xz
linux-4c806c9891100e80cbd6be654de7c8ca6f6be3ef.zip
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 <vladimir_zapolskiy@mentor.com> Acked-by: Shawn Guo <shawnguo@kernel.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-mxc.c')
-rw-r--r--drivers/gpio/gpio-mxc.c5
1 files changed, 5 insertions, 0 deletions
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;