OMAP4: omap4panda: Enable audio support

PandaBoard has twl6040 codec for audio.
Register the omap4-abe-twl6040 platform device.
Add platform data to enable the twl6040 codec.
Since there is a difference in audio between  PandaBoard 4430
and PandaBoard ES (4460):
Use different name for the sound card:
"PandaBoard" for PandaBoard 4430
"PandaBoardES" for PandaBoard ES

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
CC: Santosh Shilimkar <santosh.shilimkar@ti.com>
CC: David Anders <x0132446@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>

ASoC: omap-abe-twl6040: Use provided MCLK frequency from pdata

Avoid using hardwired configuration for MCLK frequency.
Different board design might use other MCLK frequency.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: omap-abe-twl6040: Configure card according to platform data

Disable the not connected pins on the board based on the
received platform data.
DO not register the jack function on boards, which does not have
means to detect it (jack is always connected).

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: omap-abe-twl6040: DAI link selection based on platform data

We can have machines without DMIC connected. In this case there is
no need to create amother (unusable) capture PCM on the card.
The existence of the DMIC connection can be checked via
pdata->has_dmic.
Select the correct dai_link structure for the card based on
pdata->has_dmic.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: omap-abe-twl6040: Add complete DAPM routing

SDP4430 is a reference platform, and as such it has all possible
audio routing implemented.
Correct the DAPM routing to be complete.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: twl6040: Convert MICBIAS to SUPPLY widget

In order to avoid breakage change the omap-abe-twl6040
machine driver's routing.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: omap-abe-twl6040: Convert to platform deriver

Convert the OMAP4 ABE/TWL6040 machine driver to platform
driver.
For the card name use the string provided via platform data.
The card's name for OMAP4 SDP4430 has been changed:
SDP4430 -> OMAP4-SDP4430

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

OMAP4: 4430sdp: Register platform device for OMAP4 audio

To avoid breakage in audio support with the coming change
in ASoC machine driver (conversion to platfrom device).

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
CC: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>

include: platform_data: Platform data header for OMAP4 ASoC audio

Include file to be used with the upcoming ASoC machine driver
for OMAP platform using ABE with twl6040 codec.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: omap-abe-twl6040: Correct internal prefix, Kconfig entry

Change the internal prefixes within the driver from sdp4430.
At he same time correct the Kconfig text as well.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: OMAP4: Rename the sdp4430 machine driver

The same machine driver will support other boards
with similar audio configuration (OMAP4, ABE, twl6040).
Rename the driver to have more generic name.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: sdp4430: Correct author e-mail address

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: wm5100: Fix warnings from recent patches

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert the WM5100 revision A updates to a regmap patch

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

Merge tag 'regmap-patch-initial' of git://git./linux/kernel/git/broonie/regmap into for-3.4

regmap: Inital export of the patching implementation

An initial export of the regmap register patch implementation, mostly
for integration into ASoC so it can be used by drivers there which have
conflicting updates already.

ASoC: wm5100: Fix mismerge of IRQ frees

We only want them at the device level, not at the CODEC level.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert WM8731 to direct regmap API usage

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

regmap: Support register patch sets

Device manufacturers frequently provide register sequences, usually not
fully documented, to be run at startup in order to provide better defaults
for devices (for example, improving performance in the light of silicon
evaluation). Support such updates by allowing drivers to register update
sets with the core. These updates will be written to the device immediately
and will also be rewritten when the cache is synced.

The assumption is that the reason for resyncing the cache will always be
that the device has been powered off. If this turns out to not be the case
then a separate operation can be provided.

Currently the implementation only allows a single set of updates to be
specified for a device, this could be extended in future.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Add __devinit/__devexit annotations at necessary places

Fix below build warning when CONFIG_HOTPLUG is not set.

  CC      sound/soc/codecs/alc5623.o
sound/soc/codecs/alc5623.c:1062: warning: ‘alc5623_i2c_remove’ defined but not used
  CC      sound/soc/codecs/alc5632.o
sound/soc/codecs/alc5632.c:1112: warning: ‘alc5632_i2c_remove’ defined but not used

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Leon Romanovsky <leon@leon.nu>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: sgtl5000: It's sgtl5000 not sgtl500

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: sgtl5000: Convert to table based DAPM and control init

Convert to table based DAPM and control init.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: wm8988: Convert to devm_kzalloc()

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: wm8988: Convert to table based DAPM and control init

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: wm8985: Convert to direct regmap API usage

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: wm8985 Don't directly reference the cache data structure

In preparation for conversion to regmap.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: wm8985: Use standard cache sync implementation

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: wm8985: Convert to table based DAPM and control init

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: wm8985: Convert to devm_kzalloc()

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Add external amplifier controls for Visstrim_M10.

Visstrim_M10 has an external class D amplifier.
This patch provides support for controlling the 4
possible gain levels and per channel muting.

Signed-off-by: Javier Martin <javier.martin@vista-silicon.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Fix build of tlv320dac33

The problem was introduced due to the obscure formatting some of the
older drivers use.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Use regmap update bits operation for drivers using regmap

If a driver is using regmap directly ensure that we're coherent with
non-ASoC register updates by using the regmap API directly to do our
read/modify/write cycles. This will bypass the ASoC cache but drivers
using regmap directly should not be using the ASoC cache.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Don't tell applications about msbits unless we're ignoring input

On the off chance that an application both pays attention and gets
confused.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Push WM5100 interrupt request into I2C probe

This is more what the device model wants us to do and will allow use by
non-audio functions before the audio part of the device has come up.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Make WM5100 interrupt path use regmap directly

This will allow us to move the interrupt allocation out of the ASoC part
of the driver and simplifies the locking by removing any reliance in the
bulk of the interrupt path on the big CODEC lock.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Remove redundant set_bias_level() from WM5100 remove()

The framework should bring the device down before it calls the driver.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: omap-mcpdm: Set 24msbits constraint

McPDM internal FIFO is 24 bit wide. From the 32 bit sample
8 bit is discarded. Let application know about this
via msbits constraint.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: omap-dmic: Use core to set the msbits constraint

Core can set the msbits constraint in behalf of the dai.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: twl4030: Use core to set the msbits constraint

Core can set the msbits constraint in behalf of the dai.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: tlv320dac33: Use core to set the msbits constraint

Core can set the msbits constraint in behalf of the dai.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: sgtl5000: Print revision number in hex

Throughout the sgtl5000 driver source code and also in the sgtl5000 datasheet
the revision code is shown in hexadecimal.

Print it hex format, for consistency.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Say we can't read WM5100 ID register

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: When releasing WM5100 put /RESET into reset

Reset is active low, make sure we leave it asserted when release the
device.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: 24 bits are significant on wm_hubs DAIs

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Make WM8993 I2C usage unconditional

The WM8993 only supports I2C so don't ifdef the I2C support in the driver.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Implement basic WM8993 interrupt support

If an interrupt is supplied then use it for thermal warning and FLL lock
notifications. When using the interrupt raise the timeout for the FLL lock
substantially to reduce the chances of spurious warnings.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: 24 bits are significant on the WM8996 audio interfaces

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Allow drivers to specify how many bits are significant on a DAI

Most devices accept data in formats that don't correspond directly to
their internal format. ALSA allows us to set a msbits constraint which
tells userspace about this in case it finds it useful (for example, in
order to avoid wasting effort dithering bits that will be ignored when
raising the sample size of data) so provide a mechanism for drivers to
specify the number of bits that are actually significant on a DAI and
add the appropriate constraints along with all the others.

This is done slightly awkwardly as the constraint is specified per sample
size - we loop over every possible sample size, including ones that the
device doesn't support and including ones that have fewer bits than are
actually used, but this is harmless as the upper layers do the right thing
in these cases.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>

ASoC: Add WM8962 DAC and ADC L/R swap support

Simple switches since there's no per-channel control.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: wm8983: Remove useless snd_kcontrol

This must be a leftover from a previous driver.

Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: jz4740: Convert qi_lb60 to use snd_soc_register_card()

Use snd_soc_register_card() instead of creating a "soc-audio" platform device.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert WM8962 register access map to modern style

Much more compact, both in terms of source and especially in terms of
RAM used at runtime.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Route Mic Bias in Visstrim_M10 board.

Visstrim_M10 board uses an external microphone
that can be enabled/disabled by the user

Signed-off-by: Javier Martin <javier.martin@vista-silicon.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ep93xx: Don't use system controller defines in audio drivers

Both the Snapper CL15 and EDB93xx audio drivers set the same audio
configuration in ep93xx_i2s_acquire. Remove the arguments to
ep93xx_i2s_acquire so that the audio drivers no longer need the
EP93XX_SYSCON defines exported.

Cc: Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Mika Westerberg <mika.westerberg@iki.fi>
Cc: Liam Girdwood <lrg@ti.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Ryan Mallon <rmallon@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Make WM8962 I2C usage unconditional

We only support I2C so no need to ifdef.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: CQ93VC: remove machine specific header file inclusion from codec driver

remove unnecessary inclusion of machine specific header
file mach/dm365.h from cq93vc.c voice codec driver
which comes in the way of platform code consolidation.

Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: utils - Add support for a dummy codec driver.

This is useful to create dummy codec devices where we need to have some
DAI links without a real Codec. e.g. could be used to represent dumb FM,
MODEM, etc

This is also used by dynamic PCM for DAI links that have no codec.

Signed-off-by: Liam Girdwood <lrg@ti.com>
[Fixed the indentation -- broonie]
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: twl6040 - add method to query HS DC offset step size in mV

Provide a method for mach drivers to query the HS DC offset step size in mV.

Signed-off-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Optimise performance of WM8904 ADC 128fs OSR mode

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: core - Improve card registration error messaging for large DAI links.

Print out the offending DAI link entry when a naming error occurs. Makes
thing easier to debug for machines with a large number of DAI links.

Signed-off-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: replace 0xffffffff with DMA_BIT_MASK macro

Signed-off-by: Joachim Eastwood <joachim.eastwood@jotron.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: use proper defines for stream directions in pcm engines

Signed-off-by: Joachim Eastwood <joachim.eastwood@jotron.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert WM8955 to table based DAPM and control init

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert WM8955 to direct regmap API usage

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Use standard register cache sync for WM8955

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert WM8955 to devm_kzalloc()

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Make I2C usage unconditional in WM8955

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert WM8940 to devm_kzalloc()

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Make I2C usage unconditional in WM8940

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert WM8904 to direct regmap API usage

The device has a very sparse register map so should benefit from using a
rbtree cache.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Use standard cache sync for WM8904

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert wm8904 to devm_kzalloc()

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Make WM8904 I2C usage unconditional

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert wm8804 to direct regmap API usage

The register map for this device is actually fairly sparse so the rbtree
should be beneficial.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert wm8804 to devm_kzalloc()

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Use standard cache sync for wm8804

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Remove wm8974 private data

It's only ever referenced when being allocated and freed.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert wm8974 to table based DAPM and control init

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Make wm8974 I2C usage unconditional

The driver only supports I2C at present.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert wm8971 to devm_kzalloc()

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert wm8971 to table based DAPM and control init

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Make WM8971 I2C usage unconditional

The driver only supports I2C so no need to worry about SPI only systems.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert WM8753 to direct regmap API usage

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Move WM8993 resource acquisition and device reset to bus probe

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert wm8993 to direct regmap API usage

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Move WM9090 device identification and reset to I2C probe

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert WM9090 to use regmap directly

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Push wm8978 reset down into the I2C probe

Ensures that we get control of the CODEC earlier and don't try to probe
the card at all if register I/O isn't working.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert wm8978 to direct regmap API usage

Helps push the register cache code down out of ASoC and improves resume
times by using the more efficient regmap cache sync code.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Use standard cache sync for WM8978

Saves a bit of code and supports further refactoring.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert wm8978 to devm_kzalloc()

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Convert wm8978 to table based DAPM and control init

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Remove unused control type from wm8978 driver

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Make WM8978 I2C usage unconditional

The driver only supports I2C.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: Disable register synchronisation for low frequency WM8996 SYSCLK

With a low frequency SYSCLK and a fast I2C clock register synchronisation
may occasionally take too long to take effect, causing I/O issues. Disable
synchronisation in order to avoid any issues.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@kernel.org

ASoC: Don't go through cache when applying WM5100 rev A updates

These are all to either uncached registers or fixes to register defaults,
in the former case the cache won't do anything and in the latter case
we're fixing things so the cache sync will do the right thing.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@kernel.org

ASoC: Mark WM5100 register map cache only when going into BIAS_OFF

Writing to the registers won't work if we do actually manage to hit a fully
powered off state.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@kernel.org

ASoC: tlv320aic32x4: always enable analouge block

Register LDOCTLEN must always be initialized to clear the analog power
control bit, otherwise the analog block will stay deactivated.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Javier Martin <javier.martin@vista-silicon.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: tlv320aic32x4: always enable dividers

Dividers (such as MDAC) are always needed, independent of the codec
being I2S master or slave. Needed on a custom board where the codec has
to be slave.

Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Javier Martin <javier.martin@vista-silicon.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

ASoC: sgtl5000: Fix wrong register name in restore

Correct SGTL5000_CHIP_CLK_CTRL to SGTL5000_CHIP_REF_CTRL in
sgtl5000_restore_regs(), and add comment to explain the
restore order.

Reported-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Zeng Zhaoming <zengzm.kernel@gmail.com>
Acked-by: Dong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

Linux 3.3-rc1