diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0500-overlays-Add-dpi18-overlay-1634.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0500-overlays-Add-dpi18-overlay-1634.patch | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0500-overlays-Add-dpi18-overlay-1634.patch b/target/linux/brcm2708/patches-4.4/0500-overlays-Add-dpi18-overlay-1634.patch new file mode 100644 index 0000000000..4335b20398 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0500-overlays-Add-dpi18-overlay-1634.patch @@ -0,0 +1,75 @@ +From 654ea8a724a4abaf000841788cec8f90756682a7 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <pelwell@users.noreply.github.com> +Date: Mon, 12 Sep 2016 13:46:56 +0100 +Subject: [PATCH] overlays: Add dpi18 overlay (#1634) + +Add support for 18-bit DPI displays. Although the dpi24 overlay could +be used, this overlay leaves GPIOs 22-27 free for other uses. +--- + arch/arm/boot/dts/overlays/Makefile | 1 + + arch/arm/boot/dts/overlays/README | 8 +++++++ + arch/arm/boot/dts/overlays/dpi18-overlay.dts | 31 ++++++++++++++++++++++++++++ + 3 files changed, 40 insertions(+) + create mode 100644 arch/arm/boot/dts/overlays/dpi18-overlay.dts + +--- a/arch/arm/boot/dts/overlays/Makefile ++++ b/arch/arm/boot/dts/overlays/Makefile +@@ -22,6 +22,7 @@ dtbo-$(RPI_DT_OVERLAYS) += audremap.dtbo + dtbo-$(RPI_DT_OVERLAYS) += bmp085_i2c-sensor.dtbo + dtbo-$(RPI_DT_OVERLAYS) += dht11.dtbo + dtbo-$(RPI_DT_OVERLAYS) += dionaudio-loco.dtbo ++dtbo-$(RPI_DT_OVERLAYS) += dpi18.dtbo + dtbo-$(RPI_DT_OVERLAYS) += dpi24.dtbo + dtbo-$(RPI_DT_OVERLAYS) += dwc-otg.dtbo + dtbo-$(RPI_DT_OVERLAYS) += dwc2.dtbo +--- a/arch/arm/boot/dts/overlays/README ++++ b/arch/arm/boot/dts/overlays/README +@@ -283,6 +283,14 @@ Load: dtoverlay=dionaudio-loco + Params: <None> + + ++Name: dpi18 ++Info: Overlay for a generic 18-bit DPI display ++ This uses GPIOs 0-21 (so no I2C, uart etc.), and activates the output ++ 2-3 seconds after the kernel has started. ++Load: dtoverlay=dpi18 ++Params: <None> ++ ++ + 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 +--- /dev/null ++++ b/arch/arm/boot/dts/overlays/dpi18-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 = <&dpi18_pins>; ++ }; ++ }; ++ ++ fragment@1 { ++ target = <&gpio>; ++ __overlay__ { ++ dpi18_pins: dpi18_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>; ++ brcm,function = <6>; /* alt2 */ ++ brcm,pull = <0>; /* no pull */ ++ }; ++ }; ++ }; ++}; |