We support normal mode, TDM mode and pm.

Changes since v1: [addressed comments from Andy and Fabio]
 * fix GPIO polarity from active high to active low for correct documentation
 * fix license header by using SPDX identifier
 * remove debug prints at the beginning of functions.
 * only support auto clock switching (manual switching was dead code anyway) 
(in the
   future we could add a DT property to choose between manual and auto)
 * Use gpiod API
 * use GENMASK
 * introduce power_off/power_on

One open question is the resume sequence which appears to need 
Just power_on alone isn't enough. With just power_on after resume aplay plays a
song for 1 seconds and then the sound stops.

Datasheet says, page 55"

(1) The PDN pin should be held to ā€œLā€ for more than 150 ns after AVDD and TVDD 
are powered up.

Daniel Baluta (2):
  ASoC: codecs: Add support for AK5558 ADC driver
  ASoC: ak5558: Add bindings for AK5558 ADC

 Documentation/devicetree/bindings/sound/ak5558.txt |  23 +
 sound/soc/codecs/Kconfig                           |   6 +
 sound/soc/codecs/Makefile                          |   2 +
 sound/soc/codecs/ak5558.c                          | 626 +++++++++++++++++++++
 sound/soc/codecs/ak5558.h                          |  52 ++
 5 files changed, 709 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/ak5558.txt
 create mode 100644 sound/soc/codecs/ak5558.c
 create mode 100644 sound/soc/codecs/ak5558.h


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