arm64: dts: rockchip: add backlight support for rk3399 evb board

Add backlight node for evb board, perpare for panel device node.

Signed-off-by: Yakir Yang <ykk@rock-chips.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-evb.dts b/arch/arm64/boot/dts/rockchip/rk3399-evb.dts
index 8e82497..3040a98 100644 (file)
--- a/arch/arm64/boot/dts/rockchip/rk3399-evb.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-evb.dts
@@ -49,6 +49,46 @@
        compatible = "rockchip,rk3399-evb", "rockchip,rk3399",
                     "google,rk3399evb-rev2";
 
+       backlight: backlight {
+               compatible = "pwm-backlight";
+               brightness-levels = <
+                         0   1   2   3   4   5   6   7
+                         8   9  10  11  12  13  14  15
+                        16  17  18  19  20  21  22  23
+                        24  25  26  27  28  29  30  31
+                        32  33  34  35  36  37  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>;
+               enable-gpios = <&gpio1 13 GPIO_ACTIVE_HIGH>;
+               pwms = <&pwm0 0 25000 0>;
+       };
+
        clkin_gmac: external-gmac-clock {
                compatible = "fixed-clock";
                clock-frequency = <125000000>;