linux-kernel - [PATCH 2/6] extcon-gpio: If the gpio driver/chip supports debounce, use it

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Message-Id: <1377836978-24082-3-git-send-email-linux@roeck-us.net>
Date:	Thu, 29 Aug 2013 21:29:34 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	linux-kernel@...r.kernel.org
Cc:	devicetree@...r.kernel.org, Rob Herring <rob.herring@...xeda.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ian.campbell@...rix.com>,
	MyungJoo Ham <myungjoo.ham@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Grant Likely <grant.likely@...aro.org>,
	Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH 2/6] extcon-gpio: If the gpio driver/chip supports debounce, use it

Signed-off-by: Guenter Roeck <linux@...ck-us.net>
---
 drivers/extcon/extcon-gpio.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c
index 77d35a7..973600e 100644
--- a/drivers/extcon/extcon-gpio.c
+++ b/drivers/extcon/extcon-gpio.c
@@ -111,6 +111,11 @@ static int gpio_extcon_probe(struct platform_device *pdev)
 	if (ret < 0)
 		goto err;
 
+	/* Use gpio debounce if available. If so, don't debounce in software. */
+	if (pdata->debounce &&
+	    !gpio_set_debounce(extcon_data->gpio, pdata->debounce * 1000))
+		extcon_data->debounce_jiffies = 0;
+
 	INIT_DELAYED_WORK(&extcon_data->work, gpio_extcon_work);
 
 	extcon_data->irq = gpio_to_irq(extcon_data->gpio);
-- 
1.7.9.7

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