drivers/ioexpander/aw9523b: New driver for AW9523B i/o expander #16934
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xiaoxiang781216
approved these changes
Aug 29, 2025
|
@zsaleeba please squash your patch into one. |
This is an I2C driver for the Awinic AW9523B I/O expander. As well as the supporting usual digital I/Os, this device features the ability to drive LEDs directly, and can control the drive current to each LED individually. The driver was derived from the PCA9555 driver, provides all the standard interfaces of an i/o expander driver. It also features support for the special features of the AW9523B through pin direction IOEXPANDER_DIRECTION_OUT_LED and IOEXPANDER_OPTION_NONGENERIC with AW9523B_OPTION_* options. The driver has a number of configurable features including interrupt handling and a shadow register mode based on the PCA9555 driver, plus new LED/dimming support. Testing was done using an ESP32S3 host and I2C connection to the Adafruit AW9523 breakout board. Signed-off-by: Zik Saleeba <zik@zikzak.net>
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Now squashed, thanks. |
xiaoxiang781216
approved these changes
Aug 29, 2025
acassis
approved these changes
Aug 29, 2025
|
@zsaleeba nice work! Welcome aboard!!! |
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Summary
This is an I2C driver for the Awinic AW9523B I/O expander. As well as the supporting usual digital I/Os, this device features the ability to drive LEDs directly, and can control the drive current to each LED individually. The driver was derived from the PCA9555 driver, provides all the standard interfaces of an i/o expander driver. It also features support for the special features of the AW9523B through pin direction IOEXPANDER_DIRECTION_OUT_LED and IOEXPANDER_OPTION_NONGENERIC with AW9523B_OPTION_* options.
The driver has a number of configurable features including interrupt handling and a shadow register mode based on the PCA9555 driver, plus new LED/dimming support.
Impact
Adds configurable support for the AW9523B. It shouldn't affect any existing code.
Testing
Testing was done using a custom ESP32S3 host and an I2C connection to the Adafruit AW9523 breakout board.