LF-1189-14 arm64: imx8qxp-mek: Add backlight support for LCDIF display

This patch adds backlight support for LCDIF display on
i.MX8qxp mek platform.
The backlight brightness is controlled by PWM.

Reviewed-by: Robert Chiras <robert.chiras@nxp.com>
Tested-by: Robert Chiras <robert.chiras@nxp.com>
Signed-off-by: Liu Ying <victor.liu@nxp.com>

diff --git a/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts b/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts
index a7d437b..f019970 100755 (executable)
--- a/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts
+++ b/arch/arm64/boot/dts/freescale/imx8qxp-mek.dts
@@ -24,6 +24,24 @@
                pinctrl-2 = <&pinctrl_wifi>;
        };
 
+       lcdif_backlight: lcdif-backlight {
+               compatible = "pwm-backlight";
+               pwms = <&adma_pwm 0 100000 0>;
+
+               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>;
+               default-brightness-level = <80>;
+       };
+
        lvds_backlight0: lvds_backlight@0 {
                compatible = "pwm-backlight";
                pwms = <&pwm_mipi_lvds0 0 100000 0>;