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| author | Mike Dunn <mikedunn@newsguy.com> | 2013-01-07 21:55:12 (GMT) |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2013-01-08 11:27:27 (GMT) |
| commit | 41b645c8624df6ace020a8863ad1449d69140f7d (patch) | |
| tree | 701bedcdd8922cf72ecac2e4029374c306f7bcdd /mm | |
| parent | d1c3ed669a2d452cacfb48c2d171a1f364dae2ed (diff) | |
| download | linux-41b645c8624df6ace020a8863ad1449d69140f7d.tar.xz | |
ALSA: pxa27x: fix ac97 cold reset
Cold reset on the pxa27x currently fails and
pxa2xx_ac97_try_cold_reset: cold reset timeout (GSR=0x44)
appears in the kernel log. Through trial-and-error (the pxa270 developer's
manual is mostly incoherent on the topic of ac97 reset), I got cold reset to
complete by setting the WARM_RST bit in the GCR register (and later noticed that
pxa3xx does this for cold reset as well). Also, a timeout loop is needed to
wait for the reset to complete.
Tested on a palm treo 680 machine.
Signed-off-by: Mike Dunn <mikedunn@newsguy.com>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions