linux-kernel - [PATCH 0/2] iio: input: ti_am335x_adc: Add continuous sampling and trigger support round 3

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Date:	Sat, 27 Jul 2013 00:51:12 +0100
From:	Zubair Lutfullah <zubair.lutfullah@...il.com>
To:	jic23@....ac.uk
Cc:	linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-input@...r.kernel.org, gregkh@...uxfoundation.org,
	Russ.Dill@...com
Subject: [PATCH 0/2] iio: input: ti_am335x_adc: Add continuous sampling and trigger support round 3

ADC and TSC share an IRQ line. Patch one is simple and adds shared irq support on the TSC side.

The second patch adds continuous sampling support to the am335x_adc driver.

It has been submitted previously. This is round 3.

Previously:
- Submitted as a series of patches and bug fixes.
- The driver would continuously push samples into a buffer exposed to userspace.
- Extra sysfs attributes for selecting continuous mode or one shot mode.
- No trigger functionality.
- Reading from /dev/iio required patching the provided generic_buffer.c iio test application to bypass trigger.
- Only one channel could be read at a time.
- And even then, samples were skipped as the FIFO was read incorrectly.

Now: 
- All bug fixes merged together in one patch.
- Stuck closely to the IIO ABI this time.
- Added trigger support.
- Fixed channel scanning where only one channel could be read into the buffer at a time.
- Now all enabled channels in the scan_elements folder are pushed to the userspace properly without skipping any samples.
- generic_buffer.c test application can read samples without any modification.
- A sysfs trigger starts acquisition.

This has been tested on the Beaglebone Black running the am335x processor.
The patches apply on the iio branch fixes-togreg.

Patil, Rachna (1):
  input: ti_tsc: Enable shared IRQ for TSC

Zubair Lutfullah (1):
  iio: ti_am335x_adc: Add continuous sampling and trigger support

 drivers/iio/adc/ti_am335x_adc.c           |  334 +++++++++++++++++++++++------
 drivers/input/touchscreen/ti_am335x_tsc.c |   18 +-
 include/linux/mfd/ti_am335x_tscadc.h      |   13 +-
 3 files changed, 299 insertions(+), 66 deletions(-)

-- 
1.7.9.5

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