linux-kernel - [PATCH v4 3/8] input: touchscreen: ti

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Message-ID: <1358999112-31192-4-git-send-email-rachna@ti.com>
Date:	Thu, 24 Jan 2013 09:15:07 +0530
From:	"Patil, Rachna" <rachna@...com>
To:	<linux-doc@...r.kernel.org>, <devicetree-discuss@...ts.ozlabs.org>,
	<linux-kernel@...r.kernel.org>, <linux-input@...r.kernel.org>,
	<linux-iio@...r.kernel.org>, <linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
CC:	Samuel Ortiz <sameo@...ux.intel.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Dmitry Torokhov <dtor@...l.ru>,
	Rob Herring <rob.herring@...xeda.com>,
	Jonathan Cameron <jic23@....ac.uk>,
	Tony Lindgren <tony@...mide.com>,
	Benit Cousson <b-cousson@...com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Landley <rob@...dley.net>,
	Russell King <linux@....linux.org.uk>,
	<gururaja.hebbar@...com>, "Patil, Rachna" <rachna@...com>
Subject: [PATCH v4 3/8] input: touchscreen: ti_tsc: remove unwanted fifo flush

From: "Patil, Rachna" <rachna@...com>

When touchscreen and ADC are used together, this
unwanted fifo flush leads to loss of ADC data.

Signed-off-by: Patil, Rachna <rachna@...com>
---
 drivers/input/touchscreen/ti_am335x_tsc.c |   10 ----------
 1 file changed, 10 deletions(-)

diff --git a/drivers/input/touchscreen/ti_am335x_tsc.c b/drivers/input/touchscreen/ti_am335x_tsc.c
index 0c460f9..064d2b2 100644
--- a/drivers/input/touchscreen/ti_am335x_tsc.c
+++ b/drivers/input/touchscreen/ti_am335x_tsc.c
@@ -308,8 +308,6 @@ static irqreturn_t titsc_irq(int irq, void *dev)
 	unsigned int x = 0, y = 0;
 	unsigned int z1, z2, z;
 	unsigned int fsm;
-	unsigned int fifo1count, fifo0count;
-	int i;
 
 	status = titsc_readl(ts_dev, REG_IRQSTATUS);
 	if (status & IRQENB_FIFO0THRES) {
@@ -318,14 +316,6 @@ static irqreturn_t titsc_irq(int irq, void *dev)
 		z1 = titsc_readl(ts_dev, REG_FIFO0) & 0xfff;
 		z2 = titsc_readl(ts_dev, REG_FIFO1) & 0xfff;
 
-		fifo1count = titsc_readl(ts_dev, REG_FIFO1CNT);
-		for (i = 0; i < fifo1count; i++)
-			titsc_readl(ts_dev, REG_FIFO1);
-
-		fifo0count = titsc_readl(ts_dev, REG_FIFO0CNT);
-		for (i = 0; i < fifo0count; i++)
-			titsc_readl(ts_dev, REG_FIFO0);
-
 		if (ts_dev->pen_down && z1 != 0 && z2 != 0) {
 			/*
 			 * Calculate pressure using formula
-- 
1.7.9.5

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