linux-kernel - [PATCH v2 0/4] Add support for CS42L43B codec to CS42L43 driver

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Message-ID: <20260116152054.85990-1-mstrozek@opensource.cirrus.com>
Date: Fri, 16 Jan 2026 15:20:39 +0000
From: Maciej Strozek <mstrozek@...nsource.cirrus.com>
To: Mark Brown <broonie@...nel.org>, Takashi Iwai <tiwai@...e.com>,
        Lee Jones <lee@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>
Cc: Jaroslav Kysela <perex@...ex.cz>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
        linux-kernel@...r.kernel.org, linux-sound@...r.kernel.org,
        patches@...nsource.cirrus.com, devicetree@...r.kernel.org,
        Maciej Strozek <mstrozek@...nsource.cirrus.com>
Subject: [PATCH v2 0/4] Add support for CS42L43B codec to CS42L43 driver

Hello,

Introducing CS42L43B, a variant of the CS42L43 codec with changes to
PDM (DMIC) inputs, RAM/ROM memory and extra channels to two SoundWire
ports and ISRCs, and can be supported by the existing CS42L43 driver
with some modifications.
Support is split into four commits:
 1. Add CS42L43B codec info to SoundWire utils
 2. Add dt binding for the new variant
 3. MFD driver part 1/2
 4. ASoC codec driver part 2/2

Regards,
Maciej

---
Changes in v2:
 - Rework the mechanism to identify the new variant along with some
   error handling improvements.
 - Added some comments in cs42l43_readable_register() for clarity.
 - Add handling of the I2C path for the B variant
 - Add a dt binding for the new variant
---

Maciej Strozek (4):
  ASoC: sdw_utils: Add CS42L43B codec info
  ASoC: dt-bindings: cirrus,cs42l43: Add CS42L43B variant
  mfd: cs42l43: Add support for the B variant
  ASoC: cs42l43: Add support for the B variant

 .../bindings/sound/cirrus,cs42l43.yaml        |   3 +
 drivers/mfd/cs42l43-i2c.c                     |   7 +-
 drivers/mfd/cs42l43-sdw.c                     |   4 +-
 drivers/mfd/cs42l43.c                         |  93 ++-
 drivers/mfd/cs42l43.h                         |   2 +-
 include/linux/mfd/cs42l43-regs.h              |  76 ++
 include/linux/mfd/cs42l43.h                   |   1 +
 sound/soc/codecs/cs42l43.c                    | 756 +++++++++++++++---
 sound/soc/codecs/cs42l43.h                    |   4 +-
 sound/soc/sdw_utils/soc_sdw_utils.c           |  54 ++
 10 files changed, 848 insertions(+), 152 deletions(-)

--
2.48.1