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[mcp23xxx][pi4ioe5v6408] Add optional interrupt pin to eliminate polling

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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.
This commit is contained in:
J. Nick Koston
2026-04-04 09:12:09 -10:00
parent 9f3fb37d12
commit 41e09c1e6c
28 changed files with 101 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tests/components/mcp23008/common.yaml
+6 -2
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@@ -1,6 +1,10 @@
mcp23008:
i2c_id: i2c_bus
id: mcp23008_hub
- i2c_id: i2c_bus
id: mcp23008_hub
- i2c_id: i2c_bus
id: mcp23008_hub_int
address: 0x21
interrupt_pin: ${interrupt_pin}
binary_sensor:
- platform: gpio
tests/components/mcp23008/test.esp32-idf.yaml
+3
View File
@@ -1,3 +1,6 @@
substitutions:
interrupt_pin: GPIO15
packages:
i2c: !include ../../test_build_components/common/i2c/esp32-idf.yaml
tests/components/mcp23008/test.esp8266-ard.yaml
+3
View File
@@ -1,3 +1,6 @@
substitutions:
interrupt_pin: GPIO15
packages:
i2c: !include ../../test_build_components/common/i2c/esp8266-ard.yaml
tests/components/mcp23008/test.rp2040-ard.yaml
+3
View File
@@ -1,3 +1,6 @@
substitutions:
interrupt_pin: GPIO2
packages:
i2c: !include ../../test_build_components/common/i2c/rp2040-ard.yaml
tests/components/mcp23017/common.yaml
+6 -2
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@@ -1,6 +1,10 @@
mcp23017:
i2c_id: i2c_bus
id: mcp23017_hub
- i2c_id: i2c_bus
id: mcp23017_hub
- i2c_id: i2c_bus
id: mcp23017_hub_int
address: 0x21
interrupt_pin: ${interrupt_pin}
binary_sensor:
- platform: gpio
tests/components/mcp23017/test.esp32-idf.yaml
+3
View File
@@ -1,3 +1,6 @@
substitutions:
interrupt_pin: GPIO15
packages:
i2c: !include ../../test_build_components/common/i2c/esp32-idf.yaml
tests/components/mcp23017/test.esp8266-ard.yaml
+3
View File
@@ -1,3 +1,6 @@
substitutions:
interrupt_pin: GPIO15
packages:
i2c: !include ../../test_build_components/common/i2c/esp8266-ard.yaml
tests/components/mcp23017/test.rp2040-ard.yaml
+3
View File
@@ -1,3 +1,6 @@
substitutions:
interrupt_pin: GPIO2
packages:
i2c: !include ../../test_build_components/common/i2c/rp2040-ard.yaml
tests/components/mcp23s08/common.yaml
+1
View File
@@ -2,3 +2,4 @@ mcp23s08:
- id: mcp23s08_hub
cs_pin: ${cs_pin}
deviceaddress: 0
interrupt_pin: ${interrupt_pin}
tests/components/mcp23s08/test.esp32-idf.yaml
+1
View File
@@ -1,5 +1,6 @@
substitutions:
cs_pin: GPIO5
interrupt_pin: GPIO15
packages:
spi: !include ../../test_build_components/common/spi/esp32-idf.yaml
tests/components/mcp23s08/test.esp8266-ard.yaml
+1
View File
@@ -1,5 +1,6 @@
substitutions:
cs_pin: GPIO15
interrupt_pin: GPIO13
packages:
spi: !include ../../test_build_components/common/spi/esp8266-ard.yaml
tests/components/mcp23s08/test.rp2040-ard.yaml
+1
View File
@@ -1,5 +1,6 @@
substitutions:
cs_pin: GPIO5
interrupt_pin: GPIO2
packages:
spi: !include ../../test_build_components/common/spi/rp2040-ard.yaml
tests/components/mcp23s17/common.yaml
+1
View File
@@ -2,3 +2,4 @@ mcp23s17:
- id: mcp23s17_hub
cs_pin: ${cs_pin}
deviceaddress: 0
interrupt_pin: ${interrupt_pin}
tests/components/mcp23s17/test.esp32-idf.yaml
+1
View File
@@ -1,5 +1,6 @@
substitutions:
cs_pin: GPIO5
interrupt_pin: GPIO15
packages:
spi: !include ../../test_build_components/common/spi/esp32-idf.yaml
tests/components/mcp23s17/test.esp8266-ard.yaml
+1
View File
@@ -1,5 +1,6 @@
substitutions:
cs_pin: GPIO15
interrupt_pin: GPIO13
packages:
spi: !include ../../test_build_components/common/spi/esp8266-ard.yaml
tests/components/mcp23s17/test.rp2040-ard.yaml
+1
View File
@@ -1,5 +1,6 @@
substitutions:
cs_pin: GPIO5
interrupt_pin: GPIO2
packages:
spi: !include ../../test_build_components/common/spi/rp2040-ard.yaml
tests/components/pi4ioe5v6408/common.yaml
+7 -3
View File
@@ -1,7 +1,11 @@
pi4ioe5v6408:
i2c_id: i2c_bus
id: pi4ioe1
address: 0x44
- i2c_id: i2c_bus
id: pi4ioe1
address: 0x44
- i2c_id: i2c_bus
id: pi4ioe1_int
address: 0x45
interrupt_pin: ${interrupt_pin}
switch:
- platform: gpio
tests/components/pi4ioe5v6408/test.esp32-idf.yaml
+1
View File
@@ -1,6 +1,7 @@
substitutions:
i2c_sda: GPIO21
i2c_scl: GPIO22
interrupt_pin: GPIO15
packages:
i2c: !include ../../test_build_components/common/i2c/esp32-idf.yaml
tests/components/pi4ioe5v6408/test.rp2040-ard.yaml
+1
View File
@@ -1,6 +1,7 @@
substitutions:
i2c_sda: GPIO4
i2c_scl: GPIO5
interrupt_pin: GPIO2
packages:
i2c: !include ../../test_build_components/common/i2c/rp2040-ard.yaml