Add --optional-reset-gpio parameter

Author: jenneron

driver.py

@@ -378,11 +378,17 @@ def generate_probe(p: Panel, options: Options) -> str:
 		if name == "reset":
 			init = "GPIOD_OUT_HIGH"
 
+		if name == "reset" and options.optional_reset:
+			s += f'''
+		ctx->{name}_gpio = devm_gpiod_get_optional(dev, "{name}", {init});'''
+		else:
+			s += f'''
+		ctx->{name}_gpio = devm_gpiod_get(dev, "{name}", {init});'''
+
 		s += f'''
-	ctx->{name}_gpio = devm_gpiod_get(dev, "{name}", {init});
-	if (IS_ERR(ctx->{name}_gpio))
-		return dev_err_probe(dev, PTR_ERR(ctx->{name}_gpio),
-				     "Failed to get {name}-gpios\\n");
+		if (IS_ERR(ctx->{name}_gpio))
+			return dev_err_probe(dev, PTR_ERR(ctx->{name}_gpio),
+						"Failed to get {name}-gpios\\n");
 '''
 
 	s += f'''

generator.py

@@ -20,6 +20,7 @@ class Options:
 	dcs_get_brightness: bool
 	ignore_wait: int
 	dumb_dcs: bool
+	optional_reset: bool
 
 	# Added by panel driver generator
 	compatible: str

lmdpdg.py

@@ -58,6 +58,9 @@ def generate(p: Panel, options: generator.Options) -> None:
 	enter/exit_sleep_mode and set_display_on/off (which should be supported by
 	any panel ideally).
 """)
+parser.add_argument('--optional-reset-gpio', dest='optional_reset', action='store_true',help="""
+	Use dev_gpiod_get_optional for reset GPIO.
+""")
 args = parser.parse_args(namespace=generator.Options())
 
 for f in args.dtb: