ARM: tegra: add missing unit addresses to DT

DT node names should include a unit address iff the node has a reg
property. For Tegra DTs at least, we were previously applying a different
rule, namely that node names only needed to include a unit address if it
was required to make the node name unique. Consequently, many unit
addresses are missing. Add them.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
ARM: tegra: use simplefb for Tegra20 boards with LCDs

Signed-off-by: Stephen Warren <swarren@nvidia.com>
HACK: ARM: dt: tegra: cardhu: Enable LCD panel

HACK: it's missing any of the panel/backlight control GPIOs etc.

Signed-off-by: Mark Zhang <markz@nvidia.com>
[swarren: extracted from a larger patch by Mark]
Signed-off-by: Stephen Warren <swarren@nvidia.com>
LOCAL HACK: tegra_defconfig changes

Signed-off-by: Stephen Warren <swarren@nvidia.com>
ARM: tegra: bluetooth testing hacks for Cardhu

Signed-off-by: Stephen Warren <swarren@nvidia.com>
HACK: Attempt to get DMICs working
Revert "HACK: Attempt to get DMICs working"

This reverts commit 7696d3e61c2dd5ce3f480083dc506be340062a9b.
ARM: tegra: remove tegra EMC scaling driver

Nothing calls into the Tegra EMC (External Memory Controller) scaling
driver any more, so it's dead code. Remove it.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
ASoC: wm8903: disable IRQs during BIAS_OFF

If the WM8903 IRQ is triggered after the device is suspended, or before
it is resumed, the underlying I2C bus that the WM8903 is attached to may
not be available. This may cause the IRQ handler to emit the following
error:

    wm8903 0-001a: Failed to read IRQ status: -16

... or perhaps even cause a failure inside the I2C driver.

To prevent this, explicitly mask all interrupt sources when entering
BIAS_OFF. Also, modify the IRQ handler to immediately return if the
device is in BIAS_OFF, so that shared interrupt lines don't cause a
similar problem. This requires that WM8903 interrupts be disabled to
avoid interrupt storms.

During resume (actually, the transition back to BIAS_STANDBY), restore
the desired IRQ mask.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
TEMP: allow suspend/resume on some boards with rootfs on SD card
ASoC: ep93xx: get rid of ep93xx-pcm-audio struct device

Modify the ep93xx PCM driver so that it's a utility library that can be
registered on each DAI, rather than a separate struct device. This is
more in line with how many recent DT-converted platforms operate, and
avoids the need for yet another struct device.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
ASoC: ep93xx: remove custom DMA alloc compat function

ep93xx_compat_request_channel() is almost identical to
dmaengine_pcm_compat_request_channel(), with the exception that the
latter:

a) Assumes that the DAI DMA data is a struct snd_dmaengine_dai_dma_data
   pointer rather than some custom type.

b) dma_data->filter_data rather than dma_data should be passed to
   snd_dmaengine_pcm_request_channel() as the filter data.

Make minor changes to the ep93xx DAI drivers so that those two conditions
are met. This allows removal of the custom .compat_request_channel().

Signed-off-by: Stephen Warren <swarren@nvidia.com>
ARM: ep93xx: don't register ep93xx-pcm-audio struct device

The ASoC code no longer needs this to exist as a separate struct device,
so don't register it.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
---
This patch of course depends on the earlier patch to remove ASoC's use
of this device. It can either be ack'd and go through the ASoC tree with
the previous patch, or wait around until the next kernel release and go
through the ARM tree.
ASoC: SPEAr: get rid of spear-pcm-audio struct device

Modify the SPEAr PCM driver so that it's a utility library that can be
registered on each DAI, rather than a separate struct device. This is
more in line with how many recent DT-converted platforms operate, and
avoids the need for yet another struct device.

This is also required as a pre-cursor to removing
spear_pcm_request_chan().

Signed-off-by: Stephen Warren <swarren@nvidia.com>
ASoC: SPEAr: remove custom DMA alloc compat function

spear_pcm_request_chan() is almost identical to
dmaengine_pcm_compat_request_channel(), with the exception that the
latter:

a) Assumes that the DAI DMA data is a struct snd_dmaengine_dai_dma_data
   pointer rather than some custom type.

b) dma_data->filter_data rather than dma_data should be passed to
   snd_dmaengine_pcm_request_channel() as the filter data.

Make minor changes to the SPEAr DAI drivers so that those two conditions
are met. This allows removal of the custom .compat_request_channel().

Signed-off-by: Stephen Warren <swarren@nvidia.com>
HACK: make SPEAr ASoC support compilable
ASoC: dmaengine: remove compat_request_channel

struct snd_dmaengine_pcm_config's compat_request_channel field is no
longer set anywhere. Remove it, and the code that implements it.

Signed-off-by: Stephen Warren <swarren@nvidia.com>