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From 8f6cc1607cb38e53b0638be389fceaafb48b3f34 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Tue, 5 Apr 2016 13:01:54 +0100
Subject: [PATCH] BCM270X_DT: Add dpi24 overlay
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 8 +++++++
arch/arm/boot/dts/overlays/dpi24-overlay.dts | 31 ++++++++++++++++++++++++++++
3 files changed, 40 insertions(+)
create mode 100644 arch/arm/boot/dts/overlays/dpi24-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -15,6 +15,7 @@ endif
dtbo-$(RPI_DT_OVERLAYS) += ads7846.dtbo
dtbo-$(RPI_DT_OVERLAYS) += at86rf233.dtbo
dtbo-$(RPI_DT_OVERLAYS) += bmp085_i2c-sensor.dtbo
+dtbo-$(RPI_DT_OVERLAYS) += dpi24.dtbo
dtbo-$(RPI_DT_OVERLAYS) += dwc2.dtbo
dtbo-$(RPI_DT_OVERLAYS) += dwc-otg.dtbo
dtbo-$(RPI_DT_OVERLAYS) += dht11.dtbo
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -213,6 +213,14 @@ Params: gpiopin GPIO con
(default 4)
+Name: dpi24
+Info: Overlay for a generic 24-bit DPI display
+ This uses GPIOs 0-27 (so no I2C, uart etc.), and activates the output
+ 2-3 seconds after the kernel has started.
+Load: dtoverlay=dpi24
+Params: <None>
+
+
Name: dwc-otg
Info: Selects the dwc_otg USB controller driver which has fiq support. This
is the default on all except the Pi Zero which defaults to dwc2.
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/dpi24-overlay.dts
@@ -0,0 +1,31 @@
+/dts-v1/;
+/plugin/;
+
+/{
+ compatible = "brcm,bcm2708";
+
+ // There is no DPI driver module, but we need a platform device
+ // node (that doesn't already use pinctrl) to hang the pinctrl
+ // reference on - leds will do
+
+ fragment@0 {
+ target = <&leds>;
+ __overlay__ {
+ pinctrl-names = "default";
+ pinctrl-0 = <&dpi24_pins>;
+ };
+ };
+
+ fragment@1 {
+ target = <&gpio>;
+ __overlay__ {
+ dpi24_pins: dpi24_pins {
+ brcm,pins = <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>;
+ brcm,function = <6>; /* alt2 */
+ brcm,pull = <0>; /* no pull */
+ };
+ };
+ };
+};
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