[PATCH 0/2] i2c: mux: Add NXP PCA9641 I2C bus master arbiter

[Shiv Prakash Gupta]

This series adds support for the NXP PCA9641 2-to-1 I2C bus master arbiter.

The PCA9641 allows two upstream I2C masters to share a single downstream
slave bus using a hardware lock/grant arbitration protocol. It provides
dedicated interrupt outputs (INT0/INT1) per upstream master and a 16-bit
inter-master mailbox.

The driver supports two arbitration modes:
- Interrupt mode: uses INT0/INT1 GPIO interrupt, with automatic fallback
  to polling when no IRQ is configured
- Polling mode: used when no interrupt is configured

Patch 1 adds the devicetree binding schema.
Patch 2 adds the driver with Kconfig, Makefile, and MAINTAINERS entries.

Shiv Prakash Gupta (2):
  dt-bindings: i2c: Add NXP PCA9641 I2C bus master arbiter
  i2c: mux: Add NXP PCA9641 I2C bus master arbiter driver

 .../devicetree/bindings/i2c/nxp,pca9641.yaml  | 109 +++++
 MAINTAINERS                                   |   7 +
 drivers/i2c/muxes/Kconfig                     |  15 +
 drivers/i2c/muxes/Makefile                    |   1 +
 drivers/i2c/muxes/i2c-mux-pca9641.c           | 395 ++++++++++++++++++
 5 files changed, 527 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/i2c/nxp,pca9641.yaml
 create mode 100644 drivers/i2c/muxes/i2c-mux-pca9641.c

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2.34.1