esphome/tests/components/mcp23s17/common.yaml at d403f472fc4dfd19840338d81ba44204b45f4c19 - esphome - DasFoo git

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J. Nick Koston 41e09c1e6c [mcp23xxx][pi4ioe5v6408] Add optional interrupt pin to eliminate polling

Extend interrupt_pin support to MCP23008, MCP23017, MCP23S08, MCP23S17,
and PI4IOE5V6408 GPIO expander components. Same approach as PCF8574/PCA9554:
when configured, the component disables its loop and only wakes on interrupt,
and the cache stays valid between interrupts so binary sensors return from
cache instead of doing I2C/SPI reads every loop iteration.

For MCP23xxx, the interrupt_pin config and C++ logic lives in the shared
MCP23XXXBase template class, so all four variants (I2C 8/16-pin, SPI
8/16-pin) inherit it automatically.

Inspired by jesserockz's work in #11959 which proposed a more comprehensive
interrupt-driven approach with per-pin interrupt status register reading.
This implementation takes a simpler path by leveraging the existing
CachedGpioExpander cache invalidation mechanism.

2026-04-04 09:12:09 -10:00

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 mcp23s17:
   - id: mcp23s17_hub
     cs_pin: ${cs_pin}
     deviceaddress: 0
     interrupt_pin: ${interrupt_pin}