Require reset_pin for certain waveshare_epaper models in YAML validation (#6357)

esphome/components/waveshare_epaper/display.py

@@ -131,6 +131,8 @@ MODELS = {
     "1.54in-m5coreink-m09": ("c", GDEW0154M09),
 }
 
+RESET_PIN_REQUIRED_MODELS = ("2.13inv2", "2.13in-ttgo-b74")
+
 
 def validate_full_update_every_only_types_ac(value):
     if CONF_FULL_UPDATE_EVERY not in value:
@@ -147,6 +149,14 @@ def validate_full_update_every_only_types_ac(value):
     return value
 
 
+def validate_reset_pin_required(config):
+    if config[CONF_MODEL] in RESET_PIN_REQUIRED_MODELS and CONF_RESET_PIN not in config:
+        raise cv.Invalid(
+            f"'{CONF_RESET_PIN}' is required for model {config[CONF_MODEL]}"
+        )
+    return config
+
+
 CONFIG_SCHEMA = cv.All(
     display.FULL_DISPLAY_SCHEMA.extend(
         {
@@ -165,6 +175,7 @@ CONFIG_SCHEMA = cv.All(
     .extend(cv.polling_component_schema("1s"))
     .extend(spi.spi_device_schema()),
     validate_full_update_every_only_types_ac,
+    validate_reset_pin_required,
     cv.has_at_most_one_key(CONF_PAGES, CONF_LAMBDA),
 )
 

tests/components/waveshare_epaper/test.esp32.yaml

@@ -28,6 +28,24 @@ display:
     full_update_every: 30
     lambda: |-
       it.rectangle(0, 0, it.get_width(), it.get_height());
+  - platform: waveshare_epaper
+    model: 2.13in-ttgo-b74
+    spi_id: spi_id_1
+    cs_pin:
+      allow_other_uses: true
+      number: GPIO25
+    dc_pin:
+      allow_other_uses: true
+      number: GPIO26
+    busy_pin:
+      allow_other_uses: true
+      number: GPIO27
+    reset_pin:
+      allow_other_uses: true
+      number: GPIO32
+    full_update_every: 30
+    lambda: |-
+      it.rectangle(0, 0, it.get_width(), it.get_height());
   - platform: waveshare_epaper
     model: 2.90in
     spi_id: spi_id_1