[gpio_expander][pcf8574][pca9554][tca9555][pca6416a][pi4ioe5v6408][mcp23016][mcp23xxx_base] Reject unsupported interrupt_pin options (inverted, allow_other_uses) (#18472)

esphome/components/gpio_expander/__init__.py

@@ -0,0 +1,22 @@
+from esphome import pins
+import esphome.config_validation as cv
+from esphome.const import CONF_ALLOW_OTHER_USES, CONF_INTERRUPT_PIN, CONF_INVERTED
+from esphome.types import ConfigType
+
+
+def validate_interrupt_pin(value: ConfigType) -> ConfigType:
+    # The expander components own INT polarity (active-low, hardcoded falling-edge ISR)
+    # and install a single ISR per GPIO, so neither inversion nor sharing is supported.
+    value = pins.internal_gpio_input_pin_schema(value)
+    if value.get(CONF_INVERTED):
+        raise cv.Invalid(
+            f"'{CONF_INVERTED}: true' is not supported on '{CONF_INTERRUPT_PIN}'; "
+            "the expander INT line is fixed active-low"
+        )
+    if value.get(CONF_ALLOW_OTHER_USES):
+        raise cv.Invalid(
+            f"'{CONF_ALLOW_OTHER_USES}: true' is not supported on '{CONF_INTERRUPT_PIN}'; "
+            "sharing the interrupt pin between multiple components is not implemented. "
+            f"Remove the '{CONF_INTERRUPT_PIN}' to fall back to polling."
+        )
+    return value

esphome/components/mcp23016/__init__.py

@@ -1,6 +1,6 @@
 from esphome import pins
 import esphome.codegen as cg
-from esphome.components import i2c
+from esphome.components import gpio_expander, i2c
 import esphome.config_validation as cv
 from esphome.const import (
     CONF_ID,
@@ -25,7 +25,7 @@ CONFIG_SCHEMA = (
     cv.Schema(
         {
             cv.Required(CONF_ID): cv.declare_id(MCP23016),
-            cv.Optional(CONF_INTERRUPT_PIN): pins.internal_gpio_input_pin_schema,
+            cv.Optional(CONF_INTERRUPT_PIN): gpio_expander.validate_interrupt_pin,
         }
     )
     .extend(cv.COMPONENT_SCHEMA)

esphome/components/mcp23xxx_base/__init__.py

@@ -1,8 +1,8 @@
 from esphome import pins
 import esphome.codegen as cg
+from esphome.components import gpio_expander
 import esphome.config_validation as cv
 from esphome.const import (
-    CONF_ALLOW_OTHER_USES,
     CONF_ID,
     CONF_INPUT,
     CONF_INTERRUPT,
@@ -32,28 +32,10 @@ MCP23XXX_INTERRUPT_MODES = {
 }
 
 
-def _validate_interrupt_pin(value):
-    # The MCP component owns INT polarity (active-low, hardcoded falling-edge ISR)
-    # and installs a single ISR per GPIO, so neither inversion nor sharing is supported.
-    value = pins.internal_gpio_input_pin_schema(value)
-    if value.get(CONF_INVERTED):
-        raise cv.Invalid(
-            f"'{CONF_INVERTED}: true' is not supported on '{CONF_INTERRUPT_PIN}'; "
-            "the MCP23xxx INT line is fixed active-low"
-        )
-    if value.get(CONF_ALLOW_OTHER_USES):
-        raise cv.Invalid(
-            f"'{CONF_ALLOW_OTHER_USES}: true' is not supported on '{CONF_INTERRUPT_PIN}'; "
-            "sharing the interrupt pin between multiple MCP23xxx (or other components) "
-            "is not implemented. Remove the interrupt_pin to fall back to polling."
-        )
-    return value
-
-
 MCP23XXX_CONFIG_SCHEMA = cv.Schema(
     {
         cv.Optional(CONF_OPEN_DRAIN_INTERRUPT, default=False): cv.boolean,
-        cv.Optional(CONF_INTERRUPT_PIN): _validate_interrupt_pin,
+        cv.Optional(CONF_INTERRUPT_PIN): gpio_expander.validate_interrupt_pin,
     }
 ).extend(cv.COMPONENT_SCHEMA)
 

esphome/components/pca6416a/__init__.py

@@ -1,6 +1,6 @@
 from esphome import pins
 import esphome.codegen as cg
-from esphome.components import i2c
+from esphome.components import gpio_expander, i2c
 import esphome.config_validation as cv
 from esphome.const import (
     CONF_ID,
@@ -29,7 +29,7 @@ CONFIG_SCHEMA = (
     cv.Schema(
         {
             cv.Required(CONF_ID): cv.declare_id(PCA6416AComponent),
-            cv.Optional(CONF_INTERRUPT_PIN): pins.internal_gpio_input_pin_schema,
+            cv.Optional(CONF_INTERRUPT_PIN): gpio_expander.validate_interrupt_pin,
         }
     )
     .extend(cv.COMPONENT_SCHEMA)

esphome/components/pca9554/__init__.py

@@ -1,6 +1,6 @@
 from esphome import pins
 import esphome.codegen as cg
-from esphome.components import i2c
+from esphome.components import gpio_expander, i2c
 import esphome.config_validation as cv
 from esphome.const import (
     CONF_ID,
@@ -30,7 +30,7 @@ CONFIG_SCHEMA = (
         {
             cv.Required(CONF_ID): cv.declare_id(PCA9554Component),
             cv.Optional(CONF_PIN_COUNT, default=8): cv.one_of(4, 8, 16),
-            cv.Optional(CONF_INTERRUPT_PIN): pins.internal_gpio_input_pin_schema,
+            cv.Optional(CONF_INTERRUPT_PIN): gpio_expander.validate_interrupt_pin,
         }
     )
     .extend(cv.COMPONENT_SCHEMA)

esphome/components/pcf8574/__init__.py

@@ -1,6 +1,6 @@
 from esphome import pins
 import esphome.codegen as cg
-from esphome.components import i2c
+from esphome.components import gpio_expander, i2c
 import esphome.config_validation as cv
 from esphome.const import (
     CONF_ID,
@@ -28,7 +28,7 @@ CONFIG_SCHEMA = (
         {
             cv.Required(CONF_ID): cv.declare_id(PCF8574Component),
             cv.Optional(CONF_PCF8575, default=False): cv.boolean,
-            cv.Optional(CONF_INTERRUPT_PIN): pins.internal_gpio_input_pin_schema,
+            cv.Optional(CONF_INTERRUPT_PIN): gpio_expander.validate_interrupt_pin,
         }
     )
     .extend(cv.COMPONENT_SCHEMA)

esphome/components/pi4ioe5v6408/__init__.py

@@ -1,6 +1,6 @@
 from esphome import pins
 import esphome.codegen as cg
-from esphome.components import i2c
+from esphome.components import gpio_expander, i2c
 import esphome.config_validation as cv
 from esphome.const import (
     CONF_ID,
@@ -34,7 +34,7 @@ CONFIG_SCHEMA = (
         {
             cv.Required(CONF_ID): cv.declare_id(PI4IOE5V6408Component),
             cv.Optional(CONF_RESET, default=True): cv.boolean,
-            cv.Optional(CONF_INTERRUPT_PIN): pins.internal_gpio_input_pin_schema,
+            cv.Optional(CONF_INTERRUPT_PIN): gpio_expander.validate_interrupt_pin,
         }
     )
     .extend(cv.COMPONENT_SCHEMA)

esphome/components/tca9555/__init__.py

@@ -1,6 +1,6 @@
 from esphome import pins
 import esphome.codegen as cg
-from esphome.components import i2c
+from esphome.components import gpio_expander, i2c
 import esphome.config_validation as cv
 from esphome.const import (
     CONF_ID,
@@ -28,7 +28,7 @@ CONFIG_SCHEMA = (
     cv.Schema(
         {
             cv.Required(CONF_ID): cv.declare_id(TCA9555Component),
-            cv.Optional(CONF_INTERRUPT_PIN): pins.internal_gpio_input_pin_schema,
+            cv.Optional(CONF_INTERRUPT_PIN): gpio_expander.validate_interrupt_pin,
         }
     )
     .extend(cv.COMPONENT_SCHEMA)