dtsi: add pinctrl

Fixes msm8916-mainline#29

dtsi.py

@@ -3,6 +3,10 @@
 from panel import Panel, BacklightControl
 
 
+def has_gpio_backlight(options: Options):
+	return 'backlight' in options.gpios
+
+
 def generate_backlight(p: Panel):
 	if p.backlight == BacklightControl.DCS:
 		return ""
@@ -14,6 +18,7 @@ def generate_supplies(options: Options):
 	if options.regulator:
 		for r in options.regulator:
 			s += f"\t\t{r}-supply = <&...>;\n"
+		s += f"\n"
 	return s
 
 
@@ -22,6 +27,43 @@ def generate_gpios(options: Options):
 	for name, flags in options.gpios.items():
 		flags = "GPIO_ACTIVE_LOW" if flags & GpioFlag.ACTIVE_LOW else "GPIO_ACTIVE_HIGH"
 		s += f"\t\t{name}-gpios = <&tlmm XY {flags}>;\n"
+
+	if has_gpio_backlight(options):
+		s += '''
+		pinctrl-0 = <&lcd_bl_en_default>;
+		pinctrl-names = "default";
+'''
+	return s
+
+
+def generate_tlmm(options: Options):
+	s = "&tlmm {"
+	if has_gpio_backlight(options):
+		s += '''
+	lcd_bl_en_default: lcd-bl-en-default-state {
+		pins = "gpioXY";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-disable;
+	};
+'''
+
+	s += '''
+	mdss_default: mdss-default-state {
+		pins = "gpioXY";
+		function = "gpio";
+		drive-strength = <8>;
+		bias-disable;
+	};
+
+	mdss_sleep: mdss-sleep-state {
+		pins = "gpioXY";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-pull-down;
+	};
+};
+'''
 	return s
 
 
@@ -35,6 +77,10 @@ def generate_panel_dtsi(p: Panel, options: Options) -> None:
 ''')
 		f.write(f'''\
 &mdss_dsi0 {{
+	pinctrl-0 = <&mdss_default>;
+	pinctrl-1 = <&mdss_sleep>;
+	pinctrl-names = "default", "sleep";
+
 	panel@0 {{
 		compatible = "{options.compatible}";
 		reg = <0>;
@@ -55,6 +101,7 @@ def generate_panel_dtsi(p: Panel, options: Options) -> None:
 	data-lanes = <{' '.join(map(str, p.lane_map.phys2log[:p.lanes]))}>;
 	remote-endpoint = <&panel_in>;
 }};
+
 ''')
 
 		if p.ldo_mode:
@@ -69,3 +116,5 @@ def generate_panel_dtsi(p: Panel, options: Options) -> None:
     phy-type = <PHY_TYPE_CPHY>;
 };
 ''')
+
+		f.write(f'''{generate_tlmm(options)}''')