From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> To: Zubair Lutfullah <zubair.lutfullah@gmail.com> Cc: jic23@cam.ac.uk, dmitry.torokhov@gmail.com, linux-iio@vger.kernel.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, gregkh@linuxfoundation.org, Russ.Dill@ti.com Subject: Re: [PATCH 4/4] iio: ti_am335x_adc: Add continuous sampling and trigger support Date: Fri, 16 Aug 2013 14:53:40 +0200 [thread overview] Message-ID: <20130816125340.GC1263@linutronix.de> (raw) In-Reply-To: <1376424303-22740-5-git-send-email-zubair.lutfullah@gmail.com> * Zubair Lutfullah | 2013-08-13 21:05:03 [+0100]: >diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c >index 3ceac3e..0d7e313 100644 >--- a/drivers/iio/adc/ti_am335x_adc.c >+++ b/drivers/iio/adc/ti_am335x_adc.c >@@ -24,16 +24,28 @@ … >+static irqreturn_t tiadc_irq(int irq, void *private) >+{ >+ struct iio_dev *idev = private; >+ struct tiadc_device *adc_dev = iio_priv(idev); >+ unsigned int status, config; >+ status = tiadc_readl(adc_dev, REG_IRQSTATUS); >+ >+ /* FIFO Overrun. Clear flag. Disable/Enable ADC to recover */ >+ 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 | IRQENB_FIFO1THRES); >+ tiadc_writel(adc_dev, REG_CTRL, (config | CNTRLREG_TSCSSENB)); I have no idea how other handle this but shouldn't you somehow inform *anyone* that you lost some samples due to this overrun? >+ } else if (status & IRQENB_FIFO1THRES) { >+ /* Wake adc_work that pushes FIFO data to iio buffer */ >+ tiadc_writel(adc_dev, REG_IRQCLR, IRQENB_FIFO1THRES); >+ adc_dev->data_avail = 1; >+ wake_up_interruptible(&adc_dev->wq_data_avail); >+ } else >+ return IRQ_NONE; Sebastian
WARNING: multiple messages have this Message-ID (diff)
From: Sebastian Andrzej Siewior <bigeasy-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org> To: Zubair Lutfullah <zubair.lutfullah-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> Cc: jic23-KWPb1pKIrIJaa/9Udqfwiw@public.gmane.org, dmitry.torokhov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, linux-iio-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-input-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org, Russ.Dill-l0cyMroinI0@public.gmane.org Subject: Re: [PATCH 4/4] iio: ti_am335x_adc: Add continuous sampling and trigger support Date: Fri, 16 Aug 2013 14:53:40 +0200 [thread overview] Message-ID: <20130816125340.GC1263@linutronix.de> (raw) In-Reply-To: <1376424303-22740-5-git-send-email-zubair.lutfullah-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> * Zubair Lutfullah | 2013-08-13 21:05:03 [+0100]: >diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c >index 3ceac3e..0d7e313 100644 >--- a/drivers/iio/adc/ti_am335x_adc.c >+++ b/drivers/iio/adc/ti_am335x_adc.c >@@ -24,16 +24,28 @@ … >+static irqreturn_t tiadc_irq(int irq, void *private) >+{ >+ struct iio_dev *idev = private; >+ struct tiadc_device *adc_dev = iio_priv(idev); >+ unsigned int status, config; >+ status = tiadc_readl(adc_dev, REG_IRQSTATUS); >+ >+ /* FIFO Overrun. Clear flag. Disable/Enable ADC to recover */ >+ 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 | IRQENB_FIFO1THRES); >+ tiadc_writel(adc_dev, REG_CTRL, (config | CNTRLREG_TSCSSENB)); I have no idea how other handle this but shouldn't you somehow inform *anyone* that you lost some samples due to this overrun? >+ } else if (status & IRQENB_FIFO1THRES) { >+ /* Wake adc_work that pushes FIFO data to iio buffer */ >+ tiadc_writel(adc_dev, REG_IRQCLR, IRQENB_FIFO1THRES); >+ adc_dev->data_avail = 1; >+ wake_up_interruptible(&adc_dev->wq_data_avail); >+ } else >+ return IRQ_NONE; Sebastian
next prev parent reply other threads:[~2013-08-16 12:53 UTC|newest] Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-08-13 20:04 [PATCH 0/4] iio: input: ti_am335x_adc: Add continuous sampling support round 5 Zubair Lutfullah 2013-08-13 20:05 ` [PATCH 1/4] input: ti_am335x_tsc: correct step mask update after IRQ Zubair Lutfullah 2013-08-13 20:05 ` Zubair Lutfullah 2013-08-13 20:05 ` [PATCH 2/4] input: ti_am335x_tsc: Increase sequencer delay time Zubair Lutfullah 2013-08-13 20:05 ` [PATCH 3/4] input: ti_am335x_tsc: Enable shared IRQ for TSC, add overrun and underflow checks Zubair Lutfullah 2013-08-13 20:05 ` Zubair Lutfullah 2013-08-13 20:05 ` [PATCH 4/4] iio: ti_am335x_adc: Add continuous sampling and trigger support Zubair Lutfullah 2013-08-15 11:43 ` Jonathan Cameron 2013-08-15 11:43 ` Jonathan Cameron 2013-08-16 10:07 ` Sebastian Andrzej Siewior 2013-08-16 10:07 ` Sebastian Andrzej Siewior 2013-08-16 10:17 ` Sebastian Andrzej Siewior 2013-08-16 10:17 ` Sebastian Andrzej Siewior 2013-08-16 11:33 ` Jonathan Cameron 2013-08-16 11:33 ` Jonathan Cameron 2013-08-16 10:46 ` Sebastian Andrzej Siewior 2013-08-16 21:21 ` Zubair Lutfullah : 2013-08-17 8:58 ` Zubair Lutfullah : 2013-08-17 8:58 ` Zubair Lutfullah : [not found] ` <520F9395.3050900@kernel.org> 2013-08-17 18:51 ` Zubair Lutfullah : 2013-08-16 12:53 ` Sebastian Andrzej Siewior [this message] 2013-08-16 12:53 ` Sebastian Andrzej Siewior 2013-08-16 21:18 ` Zubair Lutfullah : 2013-08-16 13:25 ` Sebastian Andrzej Siewior 2013-08-16 13:25 ` Sebastian Andrzej Siewior 2013-08-16 21:13 ` Zubair Lutfullah : 2013-08-16 14:59 ` Sebastian Andrzej Siewior 2013-08-16 14:59 ` Sebastian Andrzej Siewior 2013-08-16 21:10 ` Zubair Lutfullah : 2013-08-19 17:12 ` Sebastian Andrzej Siewior 2013-08-19 17:12 ` Sebastian Andrzej Siewior 2013-08-20 16:26 ` Zubair Lutfullah : 2013-08-20 16:26 ` Zubair Lutfullah : 2013-08-14 18:57 ` [PATCH 0/4] iio: input: ti_am335x_adc: Add continuous sampling support round 5 Jonathan Cameron 2013-08-14 18:05 ` Sebastian Andrzej Siewior 2013-08-16 21:23 ` Zubair Lutfullah : -- strict thread matches above, loose matches on Subject: below -- 2013-08-13 16:48 [PATCH 0/4] iio: input: ti_am335x_adc: Add continuous sampling support round 4 Zubair Lutfullah 2013-08-13 16:48 ` [PATCH 4/4] iio: ti_am335x_adc: Add continuous sampling and trigger support Zubair Lutfullah 2013-08-13 17:05 ` Lee Jones 2013-08-13 17:05 ` Lee Jones
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