gpio: samsung: add flags specifier to device-tree binding

This adds a flags field to the gpio specifier for Samsung. I didn't
want to add yet another field in the already quite long specifier, so
I decided to compress it together with the Pull Up/Down settings instead.

This is needed to, for example, have a gpio-keys input that is active low.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/gpio/gpio-samsung.c b/drivers/gpio/gpio-samsung.c
index b6453d0e44ad..92f7b2bb79d4 100644
--- a/drivers/gpio/gpio-samsung.c
+++ b/drivers/gpio/gpio-samsung.c
@@ -2681,11 +2681,14 @@ static int exynos_gpio_xlate(struct gpio_chip *gc,
 
         if (s3c_gpio_cfgpin(pin, S3C_GPIO_SFN(gpiospec->args[1])))
                 pr_warn("gpio_xlate: failed to set pin function\n");
-        if (s3c_gpio_setpull(pin, gpiospec->args[2]))
+        if (s3c_gpio_setpull(pin, gpiospec->args[2] & 0xffff))
                 pr_warn("gpio_xlate: failed to set pin pull up/down\n");
         if (s5p_gpio_set_drvstr(pin, gpiospec->args[3]))
                 pr_warn("gpio_xlate: failed to set pin drive strength\n");
 
+        if (flags)
+                *flags = gpiospec->args[2] >> 16;
+
         return gpiospec->args[0];
 }