[PATCH v3 0/4] SDCA System Suspend Support

[Charles Keepax <ckeepax@opensource.cirrus.com>]

Add support for system suspend into the class driver, now split
out into a separate patch chain.

Where we got to on the previous discussion, was we don't currently
have any parts requiring download on runtime resume, doing so
will add noticeable delay to the runtime resume, and we are not
blocking someone from adding support for firmware download on
runtime resume in the future. Also as runtime resume is really
a kernel concept and power rails are primarily controlled by
ACPI it is quite unlikely anyone will actually power down the
part on a runtime suspend anyway. So this version of the chain
still only downloads firmware on probe and system resume.

Thanks,
Charles

Changes since v2:
 - Update some error message capitalisation.
 - Update some kernel doc.
 - Add a runtime_get to ensure force resume runs the runtime resume.
 - Correct detection of system suspend in FDL IRQ.

Changes since v1:
 - Update SDCA IRQ enable/disable API to be more clear.

Charles Keepax (4):
  ASoC: SDCA: Add SDCA IRQ enable/disable helpers
  ASoC: SDCA: Add basic system suspend support
  ASoC: SDCA: Device boot into the system suspend process
  ASoC: SDCA: Add lock to serialise the Function initialisation

 include/sound/sdca_interrupts.h      |   7 ++
 sound/soc/sdca/sdca_class.c          |  34 ++++++++
 sound/soc/sdca/sdca_class.h          |   2 +
 sound/soc/sdca/sdca_class_function.c | 126 ++++++++++++++++++++++-----
 sound/soc/sdca/sdca_interrupts.c     |  93 ++++++++++++++++++--
 5 files changed, 236 insertions(+), 26 deletions(-)

-- 
2.47.3