[PATCH] media: rc: gpio-ir-recv.c: change platform_data to DT binding

[ujhelyi.m@gmail.com]

From: Matus Ujhelyi <ujhelyi.m@gmail.com>

Signed-off-by: Matus Ujhelyi <ujhelyi.m@gmail.com>
---
 drivers/media/rc/gpio-ir-recv.c |   84 ++++++++++++++++++++++++++++++---------
 1 file changed, 66 insertions(+), 18 deletions(-)

diff --git a/drivers/media/rc/gpio-ir-recv.c b/drivers/media/rc/gpio-ir-recv.c
index ba1a1eb..cfba079 100644
--- a/drivers/media/rc/gpio-ir-recv.c
+++ b/drivers/media/rc/gpio-ir-recv.c
@@ -58,19 +58,49 @@ err_get_value:
 	return IRQ_HANDLED;
 }
 
+static const struct of_device_id gpio_ir_of_match[] = {
+	{
+		.compatible = "gpio-ir-recv",
+	},
+};
+MODULE_DEVICE_TABLE(of, gpio_ir_of_matchof_match);
+
+static int __devinit gpio_ir_recv_dt_probe (struct gpio_rc_dev *gpio_dev,
+		struct rc_dev *rcdev, struct platform_device *pdev) {
+
+	struct device_node *node = pdev->dev.of_node;
+
+	if (!node) {
+		pr_err("Missing gpio_nr in the DT\n");
+		return -EINVAL;
+	}
+
+	if (of_property_read_u32(node, "gpio_nr", &gpio_dev->gpio_nr)) {
+		pr_err("Missing gpio_nr in the DT\n");
+		return -EINVAL;
+	}
+
+	if (of_property_read_u64(node, "allowed_protos", &rcdev->allowed_protos))
+		rcdev->allowed_protos = RC_BIT_ALL;
+
+	if (of_property_read_bool(node, "active_low"))
+		gpio_dev->active_low = true;
+	else
+		gpio_dev->active_low = false;
+
+	if (of_property_read_string(node, "map_name", &rcdev->map_name))
+		rcdev->map_name = NULL;
+
+	return 0;
+}
+
 static int __devinit gpio_ir_recv_probe(struct platform_device *pdev)
 {
 	struct gpio_rc_dev *gpio_dev;
 	struct rc_dev *rcdev;
 	const struct gpio_ir_recv_platform_data *pdata =
 					pdev->dev.platform_data;
-	int rc;
-
-	if (!pdata)
-		return -EINVAL;
-
-	if (pdata->gpio_nr < 0)
-		return -EINVAL;
+	int rc = -EINVAL;
 
 	gpio_dev = kzalloc(sizeof(struct gpio_rc_dev), GFP_KERNEL);
 	if (!gpio_dev)
@@ -82,6 +112,28 @@ static int __devinit gpio_ir_recv_probe(struct platform_device *pdev)
 		goto err_allocate_device;
 	}
 
+	if (!pdata) {
+
+		if (gpio_ir_recv_dt_probe(gpio_dev, rcdev, pdev))
+			goto err_dt_create_of;
+
+	} else {
+
+		if (pdata->allowed_protos)
+			rcdev->allowed_protos = pdata->allowed_protos;
+		else
+			rcdev->allowed_protos = RC_BIT_ALL;
+		rcdev->map_name = pdata->map_name ?: RC_MAP_EMPTY;
+
+		gpio_dev->gpio_nr = pdata->gpio_nr;
+		gpio_dev->active_low = pdata->active_low;
+
+	}
+
+	if (gpio_dev->gpio_nr < 0) {
+		goto err_gpio_nr;
+	}
+
 	rcdev->priv = gpio_dev;
 	rcdev->driver_type = RC_DRIVER_IR_RAW;
 	rcdev->input_name = GPIO_IR_DEVICE_NAME;
@@ -92,20 +144,13 @@ static int __devinit gpio_ir_recv_probe(struct platform_device *pdev)
 	rcdev->input_id.version = 0x0100;
 	rcdev->dev.parent = &pdev->dev;
 	rcdev->driver_name = GPIO_IR_DRIVER_NAME;
-	if (pdata->allowed_protos)
-		rcdev->allowed_protos = pdata->allowed_protos;
-	else
-		rcdev->allowed_protos = RC_BIT_ALL;
-	rcdev->map_name = pdata->map_name ?: RC_MAP_EMPTY;
 
 	gpio_dev->rcdev = rcdev;
-	gpio_dev->gpio_nr = pdata->gpio_nr;
-	gpio_dev->active_low = pdata->active_low;
 
-	rc = gpio_request(pdata->gpio_nr, "gpio-ir-recv");
+	rc = gpio_request(gpio_dev->gpio_nr, "gpio-ir-recv");
 	if (rc < 0)
 		goto err_gpio_request;
-	rc  = gpio_direction_input(pdata->gpio_nr);
+	rc  = gpio_direction_input(gpio_dev->gpio_nr);
 	if (rc < 0)
 		goto err_gpio_direction_input;
 
@@ -117,7 +162,7 @@ static int __devinit gpio_ir_recv_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, gpio_dev);
 
-	rc = request_any_context_irq(gpio_to_irq(pdata->gpio_nr),
+	rc = request_any_context_irq(gpio_to_irq(gpio_dev->gpio_nr),
 				gpio_ir_recv_irq,
 			IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
 					"gpio-ir-recv-irq", gpio_dev);
@@ -131,8 +176,10 @@ err_request_irq:
 	rc_unregister_device(rcdev);
 err_register_rc_device:
 err_gpio_direction_input:
-	gpio_free(pdata->gpio_nr);
+	gpio_free(gpio_dev->gpio_nr);
 err_gpio_request:
+err_dt_create_of:
+err_gpio_nr:
 	rc_free_device(rcdev);
 	rcdev = NULL;
 err_allocate_device:
@@ -195,6 +242,7 @@ static struct platform_driver gpio_ir_recv_driver = {
 #ifdef CONFIG_PM
 		.pm	= &gpio_ir_recv_pm_ops,
 #endif
+		.of_match_table = of_match_ptr(gpio_ir_of_match),
 	},
 };
 module_platform_driver(gpio_ir_recv_driver);
-- 
1.7.9.5