[LINUX PATCH v2] gpio_keys: Added support to read the IRQ_FLAGS from devicetree

[Nava kishore Manne]

This patch adds the support to read the IRQ_FLAGS from the device
instead of hard code the flags in gpio_keys_setup_key().

example gpio-keys DT node:

gpio-keys {
        compatible = "gpio-keys";
        #address-cells = <1>;
        #size-cells = <0>;
        autorepeat;
                sw14 {
                        label = "sw14";
                        gpios = <&gpio0 12 1>;
                        /*
                         * Triggering Type:
                         *
                         * 1 - edge rising
                         * 2 - edge falling
                         * 4 - level active high
                         * 8 - level active low
                         *
                         */
                        linux,code = <108>; /* down */
                        gpio-key,wakeup;
                        autorepeat;
                };
        };

Signed-off-by: Nava kishore Manne <na...@xilinx.com>
---
Changes for v2:
                -None

 drivers/input/keyboard/gpio_keys.c | 8 ++++----
 include/linux/gpio_keys.h          | 1 +
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/input/keyboard/gpio_keys.c 
b/drivers/input/keyboard/gpio_keys.c
index bef317f..07b50ad 100644
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -497,7 +497,7 @@ static int gpio_keys_setup_key(struct platform_device *pdev,
                INIT_DELAYED_WORK(&bdata->work, gpio_keys_gpio_work_func);
 
                isr = gpio_keys_gpio_isr;
-               irqflags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING;
+               irqflags = button->irq_flags;
 
        } else {
                if (!button->irq) {
@@ -630,11 +630,10 @@ gpio_keys_get_devtree_pdata(struct device *dev)
 
        i = 0;
        for_each_child_of_node(node, pp) {
-               enum of_gpio_flags flags;
 
                button = &pdata->buttons[i++];
 
-               button->gpio = of_get_gpio_flags(pp, 0, &flags);
+               button->gpio = of_get_gpio_flags(pp, 0, &button->irq_flags);
                if (button->gpio < 0) {
                        error = button->gpio;
                        if (error != -ENOENT) {
@@ -645,7 +644,8 @@ gpio_keys_get_devtree_pdata(struct device *dev)
                                return ERR_PTR(error);
                        }
                } else {
-                       button->active_low = flags & OF_GPIO_ACTIVE_LOW;
+                       button->active_low = button->irq_flags
+                                               & OF_GPIO_ACTIVE_LOW;
                }
 
                button->irq = irq_of_parse_and_map(pp, 0);
diff --git a/include/linux/gpio_keys.h b/include/linux/gpio_keys.h
index ee2d8c6..0aeecea 100644
--- a/include/linux/gpio_keys.h
+++ b/include/linux/gpio_keys.h
@@ -31,6 +31,7 @@ struct gpio_keys_button {
        bool can_disable;
        int value;
        unsigned int irq;
+       unsigned int irq_flags;
        struct gpio_desc *gpiod;
 };
 
-- 
2.1.2