ARM: dts: da850-evm: Enable LCD and Backlight
PATCH v6 1/1 ARM: dts: da850-evm: Enable LCD and Backlight
When using the board files the LCD works, but not with the DT. This adds enables the original da850-evm to work with the same LCD in device tree mode.
The EVM has a gpio for the regulator and a PWM for dimming the backlight. The LCD and the vpif display pins are mutually exclusive, so if using the LCD, do not load the vpif driver.
---
V6: Fix some whitespace and comment formatting. Rename backlight_reg to
backlight_lcd
V5: Resync against v4.18/dt
V4: Move the backlight to PWM, so the driver can control the regulator allowing the
regulator to power down and enabling the ability to change the brightness of the backlight
V3: Fix errant GPIO, label GPIO pins, and rename the regulator to be more explict to
backlight which better matches the schematic. Updated the description to explain that it cannot be used at the same time as the vpif driver.
V2: Add regulator and GPIO enable pins. Remove PWM backlight and replace with GPIO
arch/arm/boot/dts/da850-evm.dts +77 -1
@@ -27,6 +27,60 @@ spi0 = &spi1; }; + backlight: backlight-pwm { + pinctrl-names = "default"; + pinctrl-0 = <&ecap2_pins>; + power-supply = <&backlight_reg>; + compatible = "pwm-backlight"; + pwms = <&ecap2 0 50000 0>; + brightness-levels = <0 10 20 30 40 50 60 70 80 90 99>; + default-brightness-level = <7>; + }; + + panel { + compatible = "ti,tilcdc,panel"; + pinctrl-names = "default"; + pinctrl-0 = <&lcd_pins>; + /* + * The vpif and the LCD are mutually exclusive. + * To enable VPIF, change the status below to 'disabled' then + * then change the status of the vpif below to 'okay' + */ + status = "okay"; + enable-gpios = <&gpio 40 GPIO_ACTIVE_HIGH>; /* lcd_panel_pwr */ + + panel-info { + ac-bias = <255>; + ac-bias-intrpt = <0>; + dma-burst-sz = <16>; + bpp = <16>; + fdd = <0x80>; + sync-edge = <0>; + sync-ctrl = <1>; + raster-order = <0>; + fifo-th = <0>; + }; + + display-timings { + native-mode = <&timing0>; + timing0: 480x272 { + clock-frequency = <9000000>; + hactive = <480>; + vactive = <272>; + hfront-porch = <3>; + hback-porch = <2>; + hsync-len = <42>; + vback-porch = <3>; + vfront-porch = <4>; + vsync-len = <11>; + hsync-active = <0>; + vsync-active = <0>; + de-active = <1>; + pixelclk-active = <1>; + }; + }; + }; + vbat: fixedregulator0 { compatible = "regulator-fixed"; regulator-name = "vbat";
@@ -35,6 +89,15 @@ regulator-boot-on; }; + backlight_lcd: backlight-regulator { + compatible = "regulator-fixed"; + regulator-name = "lcd_backlight_pwr"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + gpio = <&gpio 47 GPIO_ACTIVE_HIGH>; /* lcd_backlight_pwr */ + enable-active-high; + }; + sound { compatible = "simple-audio-card"; simple-audio-card,name = "DA850/OMAP-L138 EVM";
@@ -63,6 +126,10 @@ }; }; +&ecap2 { + status = "okay"; +}; + &pmx_core { status = "okay";
@@ -109,6 +176,10 @@ status = "okay"; }; +&lcdc { + status = "okay"; +}; + &i2c0 { status = "okay"; clock-frequency = <100000>;
@@ -336,5 +407,10 @@ &vpif { pinctrl-names = "default"; pinctrl-0 = <&vpif_capture_pins>, <&vpif_display_pins>; - status = "okay"; + /* + * The vpif and the LCD are mutually exclusive. + * To enable VPIF, disable the ti,tilcdc,panel then + * changed the status below to 'okay' + */ + status = "disabled"; };
Signature · 1 line
2.17.0