Mike Dunn 3b4bc7bccc ALSA: pxa27x: fix ac97 warm reset ... This patch fixes some code that implements a work-around to a hardware bug in the ac97 controller on the pxa27x. A bug in the controller's warm reset functionality requires that the mfp used by the controller as the AC97_nRESET line be temporarily reconfigured as a generic output gpio (AF0) and manually held high for the duration of the warm reset cycle. This is what was done in the original code, but it was broken long ago by commit fb1bf8cd ([ARM] pxa: introduce processor specific pxa27x_assert_ac97reset()) which changed the mfp to a GPIO input instead of a high output. The fix requires the ac97 controller to obtain the gpio via gpio_request_one(), with arguments that configure the gpio as an output initially driven high. Tested on a palm treo 680 machine. Reportedly, this broken code only prevents a warm reset on hardware that lacks a pull-up on the line, which appears to be the case for me. Signed-off-by: Mike Dunn <mikedunn@newsguy.com> Signed-off-by: Igor Grinberg <grinberg@compulab.co.il> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: stable@vger.kernel.org		2013-01-08 11:27:35 +00:00
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aoa
arm	ALSA: pxa27x: fix ac97 warm reset	2013-01-08 11:27:35 +00:00
atmel
core
drivers
firewire
i2c
isa
mips
oss
parisc
pci	Sound fixes for 3.8-rc1	2012-12-20 07:52:13 -08:00
pcmcia
ppc
sh
soc	Sound fixes for 3.8-rc1	2012-12-20 07:52:13 -08:00
sparc
spi
synth
usb	Sound fixes for 3.8-rc1	2012-12-20 07:52:13 -08:00
ac97_bus.c
Kconfig	sound: remove reference to feature-removal-schedule.txt	2012-12-17 17:15:12 -08:00
last.c
Makefile
sound_core.c	sound: remove reference to feature-removal-schedule.txt	2012-12-17 17:15:12 -08:00
sound_firmware.c