linux-kernel - [RESEND PATCH 2/2] extcon: gpio: Add support for using cable names

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Date:	Wed, 5 Nov 2014 20:59:48 +0530
From:	George Cherian <george.cherian@...com>
To:	<myungjoo.ham@...sung.com>, <cw00.choi@...sung.com>
CC:	<robh+dt@...nel.org>, <pawel.moll@....com>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>, <galak@...eaurora.org>,
	<rongjun.ying@....com>, <Baohua.Song@....com>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-omap@...r.kernel.org>,
	George Cherian <george.cherian@...com>
Subject: [RESEND PATCH 2/2] extcon: gpio: Add support for using cable names

Add support for using cable names. Enables other drivers to register interest
and get notified using extcon provided notifier call backs.

Signed-off-by: George Cherian <george.cherian@...com>
---
 Documentation/devicetree/bindings/extcon/extcon-gpio.txt | 2 ++
 drivers/extcon/extcon-gpio.c                             | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/extcon/extcon-gpio.txt b/Documentation/devicetree/bindings/extcon/extcon-gpio.txt
index 30aa2e1..2c9d29f 100644
--- a/Documentation/devicetree/bindings/extcon/extcon-gpio.txt
+++ b/Documentation/devicetree/bindings/extcon/extcon-gpio.txt
@@ -7,6 +7,7 @@ Required Properties:
  - compatible: should be:
 	* "linux,extcon-gpio"
  - gpios: specifies the gpio pin used.
+ - cable-name: Name of the cable used.
 
 Optional Properties:
  - debounce: Debounce time for GPIO IRQ in ms
@@ -18,4 +19,5 @@ Eg:
 		compatible = "linux,extcon-gpio";
 		gpios = <&gpio3 12 GPIO_ACTIVE_HIGH>;
 		debounce = <20>;
+		cable-name = "USB-HOST";
 		};
diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c
index 85795de..0e1b3e8 100644
--- a/drivers/extcon/extcon-gpio.c
+++ b/drivers/extcon/extcon-gpio.c
@@ -38,6 +38,7 @@ struct gpio_extcon_data {
 	int irq;
 	struct delayed_work work;
 	unsigned long debounce_jiffies;
+	const char *cable_name[1];
 };
 
 static void gpio_extcon_work(struct work_struct *work)
@@ -100,6 +101,9 @@ static int gpio_extcon_probe(struct platform_device *pdev)
 				msecs_to_jiffies(debounce);
 	}
 
+	of_property_read_string_index(np, "cable-name", 0,
+				      extcon_data->cable_name);
+	extcon_data->edev->supported_cable = extcon_data->cable_name;
 	ret = devm_extcon_dev_register(&pdev->dev, extcon_data->edev);
 	if (ret < 0)
 		return ret;
-- 
1.8.3.1

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