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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
..
boot watchdog: twl4030_wdt: add DT support 2013-01-02 12:07:05 +01:00
common Merge branch 'devel-stable' into for-linus 2012-12-11 10:01:53 +00:00
configs ARM: arm-soc: late cleanups for omap 2012-12-30 09:59:21 -08:00
crypto
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include Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 2012-12-20 18:05:28 -08:00
kernel Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm 2012-12-20 17:56:23 -08:00
lib
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mach-at91 Sound updates for 3.8-rc1 2012-12-13 11:51:23 -08:00
mach-bcm
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mach-bcm2835 ARM: arm-soc: SoC updates for 3.8 2012-12-12 12:05:15 -08:00
mach-clps711x
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mach-cns3xxx ARM: arm-soc: Non-critical bug fixes 2012-12-12 11:32:16 -08:00
mach-davinci ARM: arm-soc fixes for 3.8 2012-12-20 07:21:54 -08:00
mach-dove ARM: arm-soc: Updates for Marvell mvebu/kirkwood 2012-12-14 14:54:26 -08:00
mach-ebsa110
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mach-ep93xx ARM: ep93xx: properly wait for UART FIFO to be empty 2012-12-12 11:22:56 +11:00
mach-exynos Merge branch 'v3.8-samsung-fixes-audio' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into fixes 2012-12-20 09:42:47 -08:00
mach-footbridge
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mach-gemini
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mach-h720x
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mach-highbank Merge branch 'next/cam-samsung' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/soc 2012-11-30 09:27:57 -08:00
mach-imx ARM: imx: Move platform-mx2-emma to arch/arm/mach-imx/devices 2012-12-17 10:58:52 +01:00
mach-integrator ARM: arm-soc: SoC updates for 3.8 2012-12-12 12:05:15 -08:00
mach-iop13xx
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mach-iop32x
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mach-iop33x
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mach-ixp4xx Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2012-12-12 11:30:02 -08:00
mach-kirkwood ARM: arm-soc: Updates for Marvell mvebu/kirkwood 2012-12-14 14:54:26 -08:00
mach-ks8695
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mach-l7200/include/mach
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mach-lpc32xx
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mach-mmp
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mach-msm
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mach-mv78xx0
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mach-mvebu
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mach-mxs Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2012-12-18 09:58:09 -08:00
mach-netx treewide: Fix typos in various drivers 2012-12-03 11:05:04 +01:00
mach-nomadik MTD pull for 3.8 2012-12-19 12:47:41 -08:00
mach-omap1 ARM: arm-soc: late cleanups for omap 2012-12-30 09:59:21 -08:00
mach-omap2 ARM: arm-soc: late cleanups for omap 2012-12-30 09:59:21 -08:00
mach-orion5x
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mach-picoxcell
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mach-prima2
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mach-pxa ALSA: pxa27x: fix ac97 warm reset 2013-01-08 11:27:35 +00:00
mach-realview ARM: 7607/1: realview: fix private peripheral memory base for EB rev. B boards 2012-12-20 10:42:00 +00:00
mach-rpc
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mach-s3c24xx Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-12-13 12:00:02 -08:00
mach-s3c64xx ARM: S3C64XX: Add I2S clkdev support 2012-12-19 09:49:29 -08:00
mach-s3c2410
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mach-s3c2412
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mach-s3c2440
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mach-s5p64x0 ARM: S5P64X0: Add I2S clkdev support 2012-12-19 09:49:29 -08:00
mach-s5pc100 ARM: S5PC100: Add I2S clkdev support 2012-12-19 09:49:29 -08:00
mach-s5pv210 ARM: S5PV210: Avoid passing the clks through platform data 2012-12-19 09:49:29 -08:00
mach-sa1100
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mach-shark
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mach-shmobile fbdev changes for 3.8: 2012-12-15 13:03:48 -08:00
mach-socfpga
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mach-spear3xx
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mach-spear6xx
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mach-spear13xx
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mach-sunxi sunxi: Change the machine compatible string. 2012-12-23 18:20:15 +01:00
mach-tegra Merge tag 'tegra-for-3.8-fixes-for-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-tegra into fixes 2012-12-17 10:04:27 -08:00
mach-u300 ARM: arm-soc fixes for 3.8 2012-12-20 07:21:54 -08:00
mach-ux500 ARM: arm-soc fixes for 3.8 2012-12-20 07:21:54 -08:00
mach-versatile
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mach-vexpress ARM: arm-soc: driver specific changes 2012-12-13 10:59:11 -08:00
mach-vt8500 ARM: arm-soc: multiplatform conversion patches 2012-12-13 10:57:16 -08:00
mach-w90x900
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mach-zynq
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mm Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm 2012-12-20 17:56:23 -08:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-12-12 18:07:07 -08:00
nwfpe
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oprofile
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plat-iop
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plat-omap ARM: arm-soc: late cleanups for omap 2012-12-30 09:59:21 -08:00
plat-orion ARM: arm-soc: Updates for Marvell mvebu/kirkwood 2012-12-14 14:54:26 -08:00
plat-pxa
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plat-s3c24xx Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-12-13 12:00:02 -08:00
plat-samsung ARM: SAMSUNG: Add missing include guard to gpio-core.h 2012-12-18 19:00:25 -08:00
plat-spear
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plat-versatile ARM: arm-soc: SoC updates for 3.8 2012-12-12 12:05:15 -08:00
tools
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vfp
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xen Features: 2012-12-13 14:29:16 -08:00
Kconfig Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal 2012-12-20 18:05:28 -08:00
Kconfig-nommu
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Kconfig.debug ARM: arm-soc: multiplatform conversion patches 2012-12-13 10:57:16 -08:00
Makefile ARM: arm-soc: multiplatform conversion patches 2012-12-13 10:57:16 -08:00