staging: comedi: me4000: introduce me4000_ai_reset()

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Introduce a helper function to stop any ai conversions and reset the
ai control register. This consolidates the common code in me4000_reset()
and me4000_ai_cancel().

Use the new helper in the ai (*insn_read) to ensure that the ai control
register is set to a known state after reading the samples.

The ai control register will now always be '0' after the (*cancel) of
a command or doing an (*insn_read). Knowing this the programming of
the register for single acquisition mode in the (*insn_read) can be
simplified.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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H Hartley Sweeten 2015-08-05 10:45:14 -07:00 • committed by Greg Kroah-Hartman

parent a31b50ed1b

commit b047d9ccc3

1 changed files with 23 additions and 33 deletions

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drivers/staging/comedi/drivers/me4000.c

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