arm64: dts: rockchip: Add backlight for rv1126b-evb

Change-Id: I9252ca0ea4f18ea8cdde86f7b40395be6817d118
Signed-off-by: Chaoyi Chen <chaoyi.chen@rock-chips.com>

arch/arm64/boot/dts/rockchip/rv1126b-evb.dtsi

@@ -10,6 +10,45 @@
 		bootargs = "earlycon=uart8250,mmio32,0x20810000 console=ttyFIQ0 root=/dev/mmcblk0p5 rootfstype=ext4 rootwait snd_soc_core.prealloc_buffer_size_kbytes=16 coherent_pool=32K";
 	};
 
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		brightness-levels = <
+			  0  20  20  21  21  22  22  23
+			 23  24  24  25  25  26  26  27
+			 27  28  28  29  29  30  30  31
+			 31  32  32  33  33  34  34  35
+			 35  36  36  37  37  38  38  39
+			 40  41  42  43  44  45  46  47
+			 48  49  50  51  52  53  54  55
+			 56  57  58  59  60  61  62  63
+			 64  65  66  67  68  69  70  71
+			 72  73  74  75  76  77  78  79
+			 80  81  82  83  84  85  86  87
+			 88  89  90  91  92  93  94  95
+			 96  97  98  99 100 101 102 103
+			104 105 106 107 108 109 110 111
+			112 113 114 115 116 117 118 119
+			120 121 122 123 124 125 126 127
+			128 129 130 131 132 133 134 135
+			136 137 138 139 140 141 142 143
+			144 145 146 147 148 149 150 151
+			152 153 154 155 156 157 158 159
+			160 161 162 163 164 165 166 167
+			168 169 170 171 172 173 174 175
+			176 177 178 179 180 181 182 183
+			184 185 186 187 188 189 190 191
+			192 193 194 195 196 197 198 199
+			200 201 202 203 204 205 206 207
+			208 209 210 211 212 213 214 215
+			216 217 218 219 220 221 222 223
+			224 225 226 227 228 229 230 231
+			232 233 234 235 236 237 238 239
+			240 241 242 243 244 245 246 247
+			248 249 250 251 252 253 254 255
+		>;
+		default-brightness-level = <200>;
+	};
+
 	vcc12v_dcin: vcc12v-dcin {
 		compatible = "regulator-fixed";
 		regulator-name = "vcc12v_dcin";

arch/arm64/boot/dts/rockchip/rv1126b-evb1-v10.dts

@@ -12,6 +12,10 @@
 	compatible = "rockchip,rv1126b-evb1-v10", "rockchip,rv1126b";
 };
 
+&backlight {
+	pwms = <&pwm2_8ch_4 0 25000 0>;
+};
+
 &i2c0 {
 	status = "okay";
 
@@ -132,3 +136,8 @@
 		};
 	};
 };
+
+&pwm2_8ch_4 {
+	pinctrl-0 = <&pwm2m1_ch4_pins>;
+	status = "okay";
+};

arch/arm64/boot/dts/rockchip/rv1126b-evb2-v10.dts

@@ -156,6 +156,10 @@
 	};
 };
 
+&backlight {
+	pwms = <&pwm2_8ch_7 0 25000 0>;
+};
+
 &pwm0_8ch_0 {
 	status = "okay";
 };
@@ -167,3 +171,7 @@
 &pwm0_8ch_2 {
 	status = "okay";
 };
+
+&pwm2_8ch_7 {
+	status = "okay";
+};