BCM270X_DT: Add PaPiRus overlay

Add Device Tree overlay for the PaPiRus ePaper Screens by Pi Supply.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

diff --git a/arch/arm/boot/dts/overlays/Makefile b/arch/arm/boot/dts/overlays/Makefile
index c50b1dfa9d7334df47ce087f9d2a7a816afa05ba..758fc6e2cc2764f28e3c50f98a332349bdec86e0 100644 (file)
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -64,6 +64,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
        mmc.dtbo \
        mpu6050.dtbo \
        mz61581.dtbo \
+       papirus.dtbo \
        pi3-act-led.dtbo \
        pi3-disable-bt.dtbo \
        pi3-disable-wifi.dtbo \

diff --git a/arch/arm/boot/dts/overlays/README b/arch/arm/boot/dts/overlays/README
index e6d777a601c91d192bc5713f9a73e1a2d4d708ef..16c0a9e043ecc59cb7b04107050b0a2749b325f1 100644 (file)
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -1001,6 +1001,17 @@ Params: speed                   Display SPI bus speed
         xohms                   Touchpanel sensitivity (X-plate resistance)
 
 
+Name:   papirus
+Info:   PaPiRus ePaper Screen by Pi Supply (both HAT and pHAT)
+Load:   dtoverlay=papirus,<param>=<val>
+Params: panel                   Display panel (required):
+                                1.44": e1144cs021
+                                2.0":  e2200cs021
+                                2.7":  e2271cs021
+
+        speed                   Display SPI bus speed
+
+
 [ The pcf2127-rtc overlay has been deleted. See i2c-rtc. ]
 
 

diff --git a/arch/arm/boot/dts/overlays/papirus-overlay.dts b/arch/arm/boot/dts/overlays/papirus-overlay.dts
new file mode 100644 (file)
index 0000000..58eb884
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/papirus-overlay.dts
@@ -0,0 +1,89 @@
+/* PaPiRus ePaper Screen by Pi Supply */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+       compatible = "brcm,bcm2708";
+
+       fragment@0 {
+               target = <&i2c_arm>;
+               __overlay__ {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+                       status = "okay";
+
+                       display_temp: lm75@48 {
+                               compatible = "lm75b";
+                               reg = <0x48>;
+                               status = "okay";
+                               #thermal-sensor-cells = <0>;
+                       };
+               };
+       };
+
+       fragment@1 {
+               target-path = "/";
+               __overlay__ {
+                       thermal-zones {
+                               display {
+                                       polling-delay-passive = <0>;
+                                       polling-delay = <0>;
+                                       thermal-sensors = <&display_temp>;
+                               };
+                       };
+               };
+       };
+
+       fragment@2 {
+               target = <&spi0>;
+               __overlay__ {
+                       status = "okay";
+
+                       spidev@0{
+                               status = "disabled";
+                       };
+               };
+       };
+
+       fragment@3 {
+               target = <&gpio>;
+               __overlay__ {
+                       repaper_pins: repaper_pins {
+                               brcm,pins = <14 15 23 24 25>;
+                               brcm,function = <1 1 1 1 0>; /* out out out out in */
+                       };
+               };
+       };
+
+       fragment@4 {
+               target = <&spi0>;
+               __overlay__ {
+                       /* needed to avoid dtc warning */
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+
+                       repaper: repaper@0{
+                               compatible = "not_set";
+                               reg = <0>;
+                               pinctrl-names = "default";
+                               pinctrl-0 = <&repaper_pins>;
+
+                               spi-max-frequency = <8000000>;
+
+                               panel-on-gpios = <&gpio 23 0>;
+                               border-gpios = <&gpio 14 0>;
+                               discharge-gpios = <&gpio 15 0>;
+                               reset-gpios = <&gpio 24 0>;
+                               busy-gpios = <&gpio 25 0>;
+
+                               repaper-thermal-zone = "display";
+                       };
+               };
+       };
+
+       __overrides__ {
+               panel = <&repaper>, "compatible";
+               speed = <&repaper>, "spi-max-frequency:0";
+       };
+};