mfd: Implement tps6586x gpio_to_irq

The TPS6586x adds the interrupt of this device using
linear mapping on irq domain.
Hence, implement gpio_to_irq to get the irq number
corresponding to TPS6586x GPIOs which is created
dynamically.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/gpio/gpio-tps6586x.c b/drivers/gpio/gpio-tps6586x.c
index 2526b3bb0fae..62e9e1cb3bc1 100644
--- a/drivers/gpio/gpio-tps6586x.c
+++ b/drivers/gpio/gpio-tps6586x.c
@@ -80,6 +80,14 @@ static int tps6586x_gpio_output(struct gpio_chip *gc, unsigned offset,
                                 val, mask);
 }
 
+static int tps6586x_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
+{
+        struct tps6586x_gpio *tps6586x_gpio = to_tps6586x_gpio(gc);
+
+        return tps6586x_irq_get_virq(tps6586x_gpio->parent,
+                                TPS6586X_INT_PLDO_0 + offset);
+}
+
 static int __devinit tps6586x_gpio_probe(struct platform_device *pdev)
 {
         struct tps6586x_platform_data *pdata;
@@ -106,6 +114,7 @@ static int __devinit tps6586x_gpio_probe(struct platform_device *pdev)
         tps6586x_gpio->gpio_chip.direction_output = tps6586x_gpio_output;
         tps6586x_gpio->gpio_chip.set    = tps6586x_gpio_set;
         tps6586x_gpio->gpio_chip.get    = tps6586x_gpio_get;
+        tps6586x_gpio->gpio_chip.to_irq = tps6586x_gpio_to_irq;
 
 #ifdef CONFIG_OF_GPIO
         tps6586x_gpio->gpio_chip.of_node = pdev->dev.parent->of_node;