[PATCH V2] gpio: palmas: add dt support

[Laxman Dewangan]

Add of_device_id table for Palma GPIO to be enable the
driver from DT file.

The driver can be registered from DT file as:
	palmas: tps65913@58 {
		:::::::::::
		palmas_gpio: palmas_gpio {
			compatible = "ti,palmas-gpio";
			gpio-controller;
			#gpio-cells = <2>;
		};
	};

Signed-off-by: Laxman Dewangan <ldewangan@xxxxxxxxxx>
---
Changes from V1:
Remove the ifdefs of CONFIG_OF around of_device_id structure for
defining compatible values.

 drivers/gpio/gpio-palmas.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/drivers/gpio/gpio-palmas.c b/drivers/gpio/gpio-palmas.c
index e3a4e56..5802662 100644
--- a/drivers/gpio/gpio-palmas.c
+++ b/drivers/gpio/gpio-palmas.c
@@ -134,7 +134,7 @@ static int palmas_gpio_probe(struct platform_device *pdev)
 	palmas_gpio->gpio_chip.get	= palmas_gpio_get;
 	palmas_gpio->gpio_chip.dev = &pdev->dev;
 #ifdef CONFIG_OF_GPIO
-	palmas_gpio->gpio_chip.of_node = palmas->dev->of_node;
+	palmas_gpio->gpio_chip.of_node = pdev->dev.of_node;
 #endif
 	palmas_pdata = dev_get_platdata(palmas->dev);
 	if (palmas_pdata && palmas_pdata->gpio_base)
@@ -159,9 +159,16 @@ static int palmas_gpio_remove(struct platform_device *pdev)
 	return gpiochip_remove(&palmas_gpio->gpio_chip);
 }
 
+static struct of_device_id of_palmas_gpio_match[] = {
+	{ .compatible = "ti,palmas-gpio"},
+	{ },
+};
+MODULE_DEVICE_TABLE(of, of_palmas_gpio_match);
+
 static struct platform_driver palmas_gpio_driver = {
 	.driver.name	= "palmas-gpio",
 	.driver.owner	= THIS_MODULE,
+	.driver.of_match_table = of_palmas_gpio_match,
 	.probe		= palmas_gpio_probe,
 	.remove		= palmas_gpio_remove,
 };
-- 
1.7.1.1

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