[v4,00/10] Add support for CS35L41 in HDA systems

Add support for laptops that have CS35L41 connected to an HDA
codec by I2S and direct I2C connection to the CPU.

Laptops that use CS35L41 and are SPI will be added in the future,
after the support for it is resolved at i2c-multi-instantiate driver.
i2c-multi-instantiate thread: https://lkml.org/lkml/2021/12/10/557

Hardware:
 - Some laptops have two CS35L41 amplifiers, connected to Realtek ALC287
   by an I2S bus and by and direct I2C to the CPU.
 - The ALC287 codec is connected to the CPU by an HDA bus.
 - The CS35L41 has a DSP which will require firmware to be loaded.

Architecture:
 - Creation of a library of shared functions for CS35L41 ASoC and HDA
 - HDA codec driver (RealTek) and CS35L41 HDA driver are combined
 by using component binding, where it uses device names to find the
 components and bind to the master
 - The HDA CS35L41 driver applies pre-defined registers sequences
 for each action in playback for HDA Sound card

Changes from V3:
 - SPI bus driver starter added
 - Use separate modules approach instead of liking library
 - Add CSC3551 ACPI _HID for more I2C laptops
 - Removed regulators from HDA driver
 - Add note about Non-conforming _HID
V3: https://lkml.org/lkml/2021/11/23/723

Changes from V2:
 - Not an RFC
 - Create a new HDA driver for CS35L41 instead of using the ASoC one
 - Use component binding and device names to find the CS35L41 driver
 - Create a shared library for ASoC and HDA CS35L41 drivers
v2: https://lkml.org/lkml/2021/10/8/344

Lucas Tanure (9):
  ASoC: cs35l41: Convert tables to shared source code
  ASoC: cs35l41: Move cs35l41_otp_unpack to shared code
  ASoC: cs35l41: Move power initializations to reg_sequence
  ASoC: cs35l41: Create shared function for errata patches
  ASoC: cs35l41: Create shared function for setting channels
  ASoC: cs35l41: Create shared function for boost configuration
  hda: cs35l41: Add support for CS35L41 in HDA systems
  ACPI / scan: Create platform device for CLSA0100 and CSC3551 ACPI
    nodes
  ALSA: hda/realtek: Add support for Legion 7 16ACHg6 laptop

Stefan Binding (1):
  ALSA: hda/realtek: Add CS35L41 support for Thinkpad laptops

 MAINTAINERS                                   |   2 +
 drivers/acpi/scan.c                           |   3 +
 drivers/platform/x86/i2c-multi-instantiate.c  |  11 +
 include/sound/cs35l41.h                       | 739 ++++++++++++++++++
 sound/pci/hda/Kconfig                         |  27 +
 sound/pci/hda/Makefile                        |  10 +
 sound/pci/hda/cs35l41_hda.c                   | 525 +++++++++++++
 sound/pci/hda/cs35l41_hda.h                   |  68 ++
 sound/pci/hda/cs35l41_hda_i2c.c               |  66 ++
 sound/pci/hda/cs35l41_hda_spi.c               |  63 ++
 sound/pci/hda/hda_component.h                 |  20 +
 sound/pci/hda/patch_realtek.c                 | 147 ++++
 sound/soc/codecs/Kconfig                      |   7 +
 sound/soc/codecs/Makefile                     |   4 +-
 sound/soc/codecs/cs35l41-i2c.c                |   1 -
 .../{cs35l41-tables.c => cs35l41-lib.c}       | 353 ++++++++-
 sound/soc/codecs/cs35l41-spi.c                |   1 -
 sound/soc/codecs/cs35l41.c                    | 360 +--------
 sound/soc/codecs/cs35l41.h                    | 734 -----------------
 19 files changed, 2049 insertions(+), 1092 deletions(-)
 create mode 100644 sound/pci/hda/cs35l41_hda.c
 create mode 100644 sound/pci/hda/cs35l41_hda.h
 create mode 100644 sound/pci/hda/cs35l41_hda_i2c.c
 create mode 100644 sound/pci/hda/cs35l41_hda_spi.c
 create mode 100644 sound/pci/hda/hda_component.h
 rename sound/soc/codecs/{cs35l41-tables.c => cs35l41-lib.c} (71%)