tree cef6a031b465523fac6e0f5c1b1466e1aa986b02
parent d3622e6f05b2134deb5ba8ca2f6bcce5391e7e6d
author Eric Millbrandt <emillbrandt@dekaresearch.com> 1283535065 -0700
committer Dmitry Torokhov <dmitry.torokhov@gmail.com> 1283714076 -0700

Input: wm97xx-core - add retries to wm97xx_read_aux_adc

Add logic to wm97xx_read_aux_adc() to retry reading the adc if the
sample failed.  This could occur if the previous sample was still in
the return register or the sample timed-out.  Also avoid a pathologic
failure mode by disabling the digitizer and returning -EBUSY after 5
retries.

Signed-off-by: Eric Millbrandt <emillbrandt@dekaresearch.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>