linux-kernel - [PATCHv3 4/4] Input: edt-ft5x06 adjust reset delays according to datasheet

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Message-Id: <1389961718-8130-5-git-send-email-LW@KARO-electronics.de>
Date:	Fri, 17 Jan 2014 13:28:38 +0100
From:	Lothar Waßmann <LW@...O-electronics.de>
To:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Rob Landley <rob@...dley.net>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Thierry Reding <thierry.reding@...il.com>,
	Grant Likely <grant.likely@...aro.org>,
	Jonathan Cameron <jic23@...nel.org>,
	Shawn Guo <shawn.guo@...aro.org>,
	Silvio F <silvio.fricke@...il.com>,
	Guennadi Liakhovetski <g.liakhovetski@....de>,
	Jingoo Han <jg1.han@...sung.com>,
	Fugang Duan <B38611@...escale.com>,
	Sachin Kamat <sachin.kamat@...aro.org>,
	devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-input@...r.kernel.org
Cc:	Lothar Waßmann <LW@...O-electronics.de>
Subject: [PATCHv3 4/4] Input: edt-ft5x06 adjust reset delays according to datasheet

The FT5x06 datasheet specifies a minimum reset width of 5ms and a
delay between deassertion of reset and start of reporting of 300ms.
Adjust the delays to conform to the datasheet.

With the original delays I sometimes experienced communication
timeouts when initializing the controller.

Signed-off-by: Lothar Waßmann <LW@...O-electronics.de>
---
 drivers/input/touchscreen/edt-ft5x06.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
index ec6b3e5..bd42845 100644
--- a/drivers/input/touchscreen/edt-ft5x06.c
+++ b/drivers/input/touchscreen/edt-ft5x06.c
@@ -653,9 +653,9 @@ static int edt_ft5x06_ts_reset(struct i2c_client *client,
 			return error;
 		}
 
-		mdelay(50);
+		mdelay(5);
 		gpio_set_value(tsdata->reset_pin, 1);
-		mdelay(100);
+		msleep(300);
 	}
 
 	return 0;
-- 
1.7.2.5

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