linux-kernel - [PATCH 2/2] iio: ti_am335x_adc: Take touchscreen channels into account for conversion timeout

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Date:	Tue, 10 Sep 2013 23:02:28 +0200
From:	Matthias Kaehlcke <matthias.list@...hlcke.net>
To:	Jonathan Cameron <jic23@....ac.uk>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	"Patil, Rachna" <rachna@...com>, Felipe Balbi <balbi@...com>,
	Pantelis Antoniou <panto@...oniou-consulting.com>
Cc:	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] iio: ti_am335x_adc: Take touchscreen channels into
 account for conversion timeout

The calculation of the old conversion timeout value was based on the number of
channels used by this driver. This doesn't take into account that other channels
can be used by the touchscreen driver. Adjust the timeout value to the maximum
if the touchscreen driver is enabled

Signed-off-by: Matthias Kaehlcke <matthias@...hlcke.net>
---
 drivers/iio/adc/ti_am335x_adc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index 3ceac3e..898fc78 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -146,7 +146,11 @@ static int tiadc_read_raw(struct iio_dev *indio_dev,
 	bool found = false;
 	u32 step_en;
 	unsigned long timeout = jiffies + usecs_to_jiffies
+#ifdef CONFIG_TOUCHSCREEN_TI_AM335X_TSC
+				(IDLE_TIMEOUT * TOTAL_CHANNELS);
+#else
 				(IDLE_TIMEOUT * adc_dev->channels);
+#endif
 	step_en = get_adc_step_mask(adc_dev);
 	am335x_tsc_se_set(adc_dev->mfd_tscadc, step_en);
 
-- 
1.8.4.rc3

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