Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934675Ab3GRWVt (ORCPT ); Thu, 18 Jul 2013 18:21:49 -0400 Received: from mail-ea0-f180.google.com ([209.85.215.180]:34367 "EHLO mail-ea0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934600Ab3GRWVp (ORCPT ); Thu, 18 Jul 2013 18:21:45 -0400 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 08/15] iio: ti_am335x_adc: Handle overrun before threshold event Date: Thu, 18 Jul 2013 23:21:19 +0100 Message-Id: <1374186086-5015-9-git-send-email-zubair.lutfullah@gmail.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1374186086-5015-1-git-send-email-zubair.lutfullah@gmail.com> References: <1374186086-5015-1-git-send-email-zubair.lutfullah@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2037 Lines: 61 From: Russ Dill If an overrun occurs, the threshold event is meaningless, handle the overrun event first. Signed-off-by: Russ Dill Signed-off-by: Zubair Lutfullah --- drivers/iio/adc/ti_am335x_adc.c | 24 ++++++++++-------------- 1 file changed, 10 insertions(+), 14 deletions(-) diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c index 1c47818..7ac28a9 100644 --- a/drivers/iio/adc/ti_am335x_adc.c +++ b/drivers/iio/adc/ti_am335x_adc.c @@ -167,7 +167,16 @@ static irqreturn_t tiadc_irq(int irq, void *private) unsigned int status, config; status = tiadc_readl(adc_dev, REG_IRQSTATUS); - if (status & IRQENB_FIFO1THRES) { + if (status & IRQENB_FIFO1OVRRUN) { + config = tiadc_readl(adc_dev, REG_CTRL); + config &= ~(CNTRLREG_TSCSSENB); + tiadc_writel(adc_dev, REG_CTRL, config); + tiadc_writel(adc_dev, REG_IRQSTATUS, + IRQENB_FIFO1OVRRUN | IRQENB_FIFO1UNDRFLW); + tiadc_writel(adc_dev, REG_CTRL, + (config | CNTRLREG_TSCSSENB)); + return IRQ_HANDLED; + } else if (status & IRQENB_FIFO1THRES) { tiadc_writel(adc_dev, REG_IRQCLR, IRQENB_FIFO1THRES); @@ -180,19 +189,6 @@ static irqreturn_t tiadc_irq(int irq, void *private) tiadc_writel(adc_dev, REG_IRQSTATUS, IRQENB_FIFO1THRES); return IRQ_HANDLED; - } else if ((status & IRQENB_FIFO1OVRRUN) || - (status & IRQENB_FIFO1UNDRFLW)) { - config = tiadc_readl(adc_dev, REG_CTRL); - config &= ~(CNTRLREG_TSCSSENB); - tiadc_writel(adc_dev, REG_CTRL, config); - - tiadc_writel(adc_dev, REG_IRQSTATUS, - IRQENB_FIFO1OVRRUN | - IRQENB_FIFO1UNDRFLW); - - tiadc_writel(adc_dev, REG_CTRL, - (config | CNTRLREG_TSCSSENB)); - return IRQ_HANDLED; } else { return IRQ_NONE; } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/