platform/chrome: cros_kbd_led_backlight: support OF match

Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>

drivers/platform/chrome/cros_kbd_led_backlight.c

@@ -10,6 +10,7 @@
 #include <linux/kernel.h>
 #include <linux/leds.h>
 #include <linux/module.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 
@@ -128,8 +129,11 @@ static int keyboard_led_probe(struct platform_device *pdev)
 	int error;
 
 	drvdata = acpi_device_get_match_data(&pdev->dev);
-	if (!drvdata)
-		return -EINVAL;
+	if (!drvdata) {
+		drvdata = of_device_get_match_data(&pdev->dev);
+		if (!drvdata)
+			return -EINVAL;
+	}
 
 	if (drvdata->init) {
 		error = drvdata->init(pdev);
@@ -161,10 +165,19 @@ static const struct acpi_device_id keyboard_led_acpi_match[] = {
 };
 MODULE_DEVICE_TABLE(acpi, keyboard_led_acpi_match);
 
+static const struct of_device_id keyboard_led_of_match[] = {
+	{
+		.compatible = "google,cros-kbd-led-backlight",
+	},
+	{}
+};
+MODULE_DEVICE_TABLE(of, keyboard_led_of_match);
+
 static struct platform_driver keyboard_led_driver = {
 	.driver		= {
 		.name	= "chromeos-keyboard-leds",
 		.acpi_match_table = ACPI_PTR(keyboard_led_acpi_match),
+		.of_match_table = of_match_ptr(keyboard_led_of_match),
 	},
 	.probe		= keyboard_led_probe,
 };