linux-kernel - [PATCH 3/4] extcon: usb-gpio: make debounce value configurable in devicetree

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Message-id: <1427787963-23562-4-git-send-email-r.baldyga@samsung.com>
Date:	Tue, 31 Mar 2015 09:46:02 +0200
From:	Robert Baldyga <r.baldyga@...sung.com>
To:	cw00.choi@...sung.com
Cc:	myungjoo.ham@...sung.com, rogerq@...com,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	m.szyprowski@...sung.com, Robert Baldyga <r.baldyga@...sung.com>
Subject: [PATCH 3/4] extcon: usb-gpio: make debounce value configurable in
 devicetree

This patch adds devicetree property for setting debounce value. It allows
to set debounce time shorter or longer depending on the needs of given
platform.

Signed-off-by: Robert Baldyga <r.baldyga@...sung.com>
---
 drivers/extcon/extcon-usb-gpio.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/extcon/extcon-usb-gpio.c b/drivers/extcon/extcon-usb-gpio.c
index 02ff40e..86e3ece 100644
--- a/drivers/extcon/extcon-usb-gpio.c
+++ b/drivers/extcon/extcon-usb-gpio.c
@@ -130,6 +130,7 @@ static int usb_extcon_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev->of_node;
 	struct usb_extcon_info *info;
+	u32 debounce;
 	int ret;
 
 	if (!np)
@@ -140,6 +141,11 @@ static int usb_extcon_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	info->dev = dev;
+
+	ret = of_property_read_u32(np, "debounce", &debounce);
+	if (ret < 0)
+		debounce = USB_GPIO_DEBOUNCE_MS;
+
 	info->id_gpiod = devm_gpiod_get_optional(&pdev->dev, "id");
 	info->vbus_gpiod = devm_gpiod_get_optional(&pdev->dev, "vbus");
 
@@ -161,16 +167,14 @@ static int usb_extcon_probe(struct platform_device *pdev)
 	}
 
 	if (info->id_gpiod)
-		ret = gpiod_set_debounce(info->id_gpiod,
-			USB_GPIO_DEBOUNCE_MS * 1000);
+		ret = gpiod_set_debounce(info->id_gpiod, debounce * 1000);
 	if (!ret && info->vbus_gpiod) {
-		ret = gpiod_set_debounce(info->vbus_gpiod,
-			USB_GPIO_DEBOUNCE_MS * 1000);
+		ret = gpiod_set_debounce(info->vbus_gpiod, debounce * 1000);
 		if (ret < 0 && info->id_gpiod)
 			gpiod_set_debounce(info->vbus_gpiod, 0);
 	}
 	if (ret < 0)
-		info->debounce_jiffies = msecs_to_jiffies(USB_GPIO_DEBOUNCE_MS);
+		info->debounce_jiffies = msecs_to_jiffies(debounce);
 
 	INIT_DELAYED_WORK(&info->wq_detcable, usb_extcon_detect_cable);
 
-- 
1.9.1

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