From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Zubair Lutfullah To: jic23@cam.ac.uk Cc: gregkh@linuxfoundation.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, koen@dominion.thruhere.net Subject: [PATCH 13/15] iio: ti_am335x_adc: Fix capture operation during resume Date: Thu, 18 Jul 2013 23:21:24 +0100 Message-Id: <1374186086-5015-14-git-send-email-zubair.lutfullah@gmail.com> In-Reply-To: <1374186086-5015-1-git-send-email-zubair.lutfullah@gmail.com> References: <1374186086-5015-1-git-send-email-zubair.lutfullah@gmail.com> List-ID: From: Russ Dill The ADC needs to go through a proper initialization sequence after resuming from suspend. Signed-off-by: Russ Dill Signed-off-by: Zubair Lutfullah --- drivers/iio/adc/ti_am335x_adc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c index 44b7181..265ed27 100644 --- a/drivers/iio/adc/ti_am335x_adc.c +++ b/drivers/iio/adc/ti_am335x_adc.c @@ -552,11 +552,14 @@ static int tiadc_resume(struct device *dev) struct tiadc_device *adc_dev = iio_priv(indio_dev); unsigned int restore; + restore = tiadc_readl(adc_dev, REG_CTRL); + restore &= ~(CNTRLREG_TSCSSENB); + tiadc_writel(adc_dev, REG_CTRL, restore); tiadc_writel(adc_dev, REG_FIFO1THR, FIFO1_THRESHOLD); tiadc_step_config(adc_dev, adc_dev->is_continuous_mode); /* Make sure ADC is powered up */ - restore = tiadc_readl(adc_dev, REG_CTRL); restore &= ~(CNTRLREG_POWERDOWN); + restore |= CNTRLREG_TSCSSENB; tiadc_writel(adc_dev, REG_CTRL, restore); return 0; -- 1.7.9.5