From: "Zubair Lutfullah :" <zubair.lutfullah@gmail.com> To: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Zubair Lutfullah <zubair.lutfullah@gmail.com>, 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: Tue, 20 Aug 2013 17:26:58 +0100 [thread overview] Message-ID: <20130820162657.GA6776@gmail.com> (raw) In-Reply-To: <20130819171238.GA31610@linutronix.de> On Mon, Aug 19, 2013 at 07:12:38PM +0200, Sebastian Andrzej Siewior wrote: > * 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 > … > >+static irqreturn_t tiadc_irq(int irq, void *private) > >+{ > … > >+ wake_up_interruptible(&adc_dev->wq_data_avail); > … > >+} > … > >+static irqreturn_t tiadc_trigger_h(int irq, void *p) > >+{ > … > >+ schedule_work(&adc_dev->poll_work); > … > >+} > … > >+static void tiadc_adc_work(struct work_struct *work_s) > >+{ > … > >+ wait_event_interruptible(adc_dev->wq_data_avail, > >+ (adc_dev->data_avail == 1)); > … > >+} > > This is not very nice. The problem is that you might sleep in a > workqueue and so the other jobs will wait until you are done. I'm think This will change to a different style. > I'm looking into DMA support for this so once your code is working it > should be possible to switch to DMA instead reading byte wise from the > fifo. Great. > How did you test the whole thing? Do you have a test program which > selects a few sources and reads them in continuous mode? > generic_buffer.c runs for this for sysfs trigger.. However. If you follow the other thread. This is obsolete and trigger style is changing to a driver trigger. I'll update when I'm done. Thanks ZubairLK
WARNING: multiple messages have this Message-ID (diff)
From: "Zubair Lutfullah :" <zubair.lutfullah-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> To: Sebastian Andrzej Siewior <bigeasy-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org> Cc: Zubair Lutfullah <zubair.lutfullah-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, 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: Tue, 20 Aug 2013 17:26:58 +0100 [thread overview] Message-ID: <20130820162657.GA6776@gmail.com> (raw) In-Reply-To: <20130819171238.GA31610-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org> On Mon, Aug 19, 2013 at 07:12:38PM +0200, Sebastian Andrzej Siewior wrote: > * 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 > … > >+static irqreturn_t tiadc_irq(int irq, void *private) > >+{ > … > >+ wake_up_interruptible(&adc_dev->wq_data_avail); > … > >+} > … > >+static irqreturn_t tiadc_trigger_h(int irq, void *p) > >+{ > … > >+ schedule_work(&adc_dev->poll_work); > … > >+} > … > >+static void tiadc_adc_work(struct work_struct *work_s) > >+{ > … > >+ wait_event_interruptible(adc_dev->wq_data_avail, > >+ (adc_dev->data_avail == 1)); > … > >+} > > This is not very nice. The problem is that you might sleep in a > workqueue and so the other jobs will wait until you are done. I'm think This will change to a different style. > I'm looking into DMA support for this so once your code is working it > should be possible to switch to DMA instead reading byte wise from the > fifo. Great. > How did you test the whole thing? Do you have a test program which > selects a few sources and reads them in continuous mode? > generic_buffer.c runs for this for sysfs trigger.. However. If you follow the other thread. This is obsolete and trigger style is changing to a driver trigger. I'll update when I'm done. Thanks ZubairLK
next prev parent reply other threads:[~2013-08-20 16:27 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 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 : [this message] 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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