The BPI-M1+ has an FPC connector for connecting an RGB (parallel) or
LVDS LCD panel. One of the compatible panels is a 7" 800x480 RGB panel
from Bananapi. The backlight can be controlled by driving a PWM signal
from the SoC at different duty cycles. The LCD enable pin does not seem
to do anything, but it is nevertheless included for completeness. There
is also a FT5306 capacitive touchscreen controller.
This should not be confused with the other 7" LCD that is LVDS based
and has a resolution of 1024x600.
This patch enables all of the above for the BPI-M1+.
Signed-off-by: Chen-Yu Tsai <wens@xxxxxxxx>
---
.../boot/dts/sun7i-a20-bananapi-m1-plus.dts | 56 +++++++++++++++++++
1 file changed, 56 insertions(+)
diff --git a/arch/arm/boot/dts/sun7i-a20-bananapi-m1-plus.dts b/arch/arm/boot/dts/sun7i-a20-bananapi-m1-plus.dts
index 763cb03033c4..9fa58adade56 100644
--- a/arch/arm/boot/dts/sun7i-a20-bananapi-m1-plus.dts
+++ b/arch/arm/boot/dts/sun7i-a20-bananapi-m1-plus.dts
@@ -47,6 +47,7 @@
#include "sunxi-common-regulators.dtsi"
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/pwm/pwm.h>
/ {
model = "Banana Pi BPI-M1-Plus";
@@ -71,6 +72,29 @@
};
};
+ lcd_backlight: lcd-backlight {
+ compatible = "pwm-backlight";
+ pwms = <&pwm 0 20000 PWM_POLARITY_INVERTED>; /* 50 kHz */
+ enable-gpios = <&pio 7 9 GPIO_ACTIVE_HIGH>; /* PH9 */
+ brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>;
+ default-brightness-level = <8>;
+ };
+
+ lcd_panel: lcd-panel {
+ compatible = "bananapi,s070wv20-ct16", "simple-panel";
+ power-supply = <®_vcc5v0>; /* Actually driven from IPSOUT */
+ /* This doesn't do anything for this particular connector */
+ enable-gpios = <&pio 7 12 GPIO_ACTIVE_HIGH>; /* PH12 */
+
+ port {
+ backlight = <&lcd_backlight>;
+
+ lcd_panel_input: endpoint {
+ remote-endpoint = <&tcon0_out_lcd>;
+ };
+ };
+ };
+
leds {
compatible = "gpio-leds";
pinctrl-names = "default";
@@ -173,6 +197,20 @@
status = "okay";
};
+&i2c3 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2c3_pins_a>;
+ status = "okay";
+
+ touchscreen@38 {
+ compatible = "edt,edt-ft5306", "edt,edt-ft5x06";
+ reg = <0x38>;
+ interrupt-parent = <&pio>;
+ interrupts = <7 7 IRQ_TYPE_EDGE_FALLING>; /* PH7 */
+ reset-gpios = <&pio 7 8 GPIO_ACTIVE_LOW>; /* PH8 */
+ };
+};
+
&ir0 {
pinctrl-names = "default";
pinctrl-0 = <&ir0_rx_pins_a>;
@@ -249,6 +287,12 @@
};
};
+&pwm {
+ pinctrl-names = "default";
+ pinctrl-0 = <&pwm0_pins_a>;
+ status = "okay";
+};
+
®_dcdc2 {
regulator-always-on;
regulator-min-microvolt = <1000000>;
@@ -278,6 +322,18 @@
status = "okay";
};
+&tcon0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&lcd0_rgb888_pins>;
+};
+
+&tcon0_out {
+ tcon0_out_lcd: endpoint@0 {
+ reg = <0>;
+ remote-endpoint = <&lcd_panel_input>;
+ };
+};
+
&uart0 {
pinctrl-names = "default";
pinctrl-0 = <&uart0_pins_a>;
--
2.19.0.rc1
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