linux/include
Stephen Warren a0f203d384 ASoC: WM8903: Fix platform data gpio_cfg confusion
wm8903_platform_data.gpio_cfg[] was intended to be interpreted as follows:
0:       Don't touch this GPIO's configuration register
1..7fff: Write that value to the GPIO's configuration register
8000:    Write zero to the GPIO's configuration register
other:   Undefined (invalid)

The rationale is that platform data is usually global data, and a value of
zero means that the field wasn't explicitly set to anything (e.g. because
the field was new to the pdata type, and existing users weren't update to
initialize it) and hence the value zero should be ignored. 0x8000 is an
explicit way to get 0 in the register.

The code worked this way until commit 7cfe561 "ASoC: wm8903: Expose GPIOs
through gpiolib", where the behaviour was changed due to my lack of
awareness of the above rationale.

This patch reverts to the intended behaviour, and updates all in-tree users
to use the correct scheme. This also makes WM8903 consistent with other
devices that use a similar scheme.

WM8903_GPIO_NO_CONFIG is also renamed to WM8903_GPIO_CONFIG_ZERO so that
its name accurately reflects its purpose.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: Colin Cross <ccross@android.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-12-06 10:29:22 +00:00
..
acpi Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2011-11-07 10:13:52 -08:00
asm-generic Merge Qualcom Hexagon architecture 2011-11-01 07:48:13 -07:00
crypto crypto: Add a report function pointer to crypto_type 2011-10-21 14:24:03 +02:00
drm Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux 2011-11-07 10:01:56 -08:00
keys
linux ASoC: Add platform data for WM8958/WM1811 microphone detection rates 2011-12-01 14:22:01 +00:00
math-emu
media Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
misc [media] altera-stapl: it is time to move out from staging 2011-09-23 15:00:57 -03:00
mtd
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2011-11-07 10:55:33 -08:00
pcmcia
rdma Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2011-11-01 10:51:38 -07:00
rxrpc
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2011-10-28 16:44:18 -07:00
sound ASoC: WM8903: Fix platform data gpio_cfg confusion 2011-12-06 10:29:22 +00:00
target Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2011-11-06 19:00:42 -08:00
trace Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux 2011-11-06 19:44:47 -08:00
video Merge branch 'for-florian' of git://gitorious.org/linux-omap-dss2/linux into fbdev-next 2011-10-15 00:19:52 +00:00
xen Merge branch 'upstream/xen-settime' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen 2011-11-06 20:15:05 -08:00
Kbuild