mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-29 10:08:59 +00:00
78 lines
2.5 KiB
Diff
78 lines
2.5 KiB
Diff
From 265838d467aedd75abf2949373d889cfec090168 Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.org>
|
|
Date: Tue, 30 Jun 2015 09:10:36 +0100
|
|
Subject: [PATCH 107/121] BCM270X_DT: Overlay for the Fen Logic VGA666 board
|
|
|
|
The VGA666 board requires GPIOs 2-21 (so no I2C or UART). Using the
|
|
overlay (instead of a custom dt-blob.bin) has the advantage that it will
|
|
reserve those pins and stop other devices using them (except for GPIO),
|
|
but it does delay the point at which the output becomes valid until 2-3
|
|
seconds after the kernel has started.
|
|
---
|
|
arch/arm/boot/dts/overlays/Makefile | 1 +
|
|
arch/arm/boot/dts/overlays/README | 8 +++++++
|
|
arch/arm/boot/dts/overlays/vga666-overlay.dts | 30 +++++++++++++++++++++++++++
|
|
3 files changed, 39 insertions(+)
|
|
create mode 100644 arch/arm/boot/dts/overlays/vga666-overlay.dts
|
|
|
|
--- a/arch/arm/boot/dts/overlays/Makefile
|
|
+++ b/arch/arm/boot/dts/overlays/Makefile
|
|
@@ -43,6 +43,7 @@ dtb-$(RPI_DT_OVERLAYS) += spi-bcm2708-ov
|
|
dtb-$(RPI_DT_OVERLAYS) += spi-bcm2835-overlay.dtb
|
|
dtb-$(RPI_DT_OVERLAYS) += tinylcd35-overlay.dtb
|
|
dtb-$(RPI_DT_OVERLAYS) += uart1-overlay.dtb
|
|
+dtb-$(RPI_DT_OVERLAYS) += vga666-overlay.dtb
|
|
dtb-$(RPI_DT_OVERLAYS) += w1-gpio-overlay.dtb
|
|
dtb-$(RPI_DT_OVERLAYS) += w1-gpio-pullup-overlay.dtb
|
|
|
|
--- a/arch/arm/boot/dts/overlays/README
|
|
+++ b/arch/arm/boot/dts/overlays/README
|
|
@@ -497,6 +497,14 @@ Params: txd1_pin GPIO pi
|
|
rxd1_pin GPIO pin for RXD1 (15, 33 or 41 - default 15)
|
|
|
|
|
|
+Name: vga666
|
|
+Info: Overlay for the Fen Logic VGA666 board
|
|
+ This uses GPIOs 2-21 (so no I2C), and activates the output 2-3 seconds
|
|
+ after the kernel has started.
|
|
+Load: dtoverlay=vga666
|
|
+Params: <None>
|
|
+
|
|
+
|
|
Name: w1-gpio
|
|
Info: Configures the w1-gpio Onewire interface module.
|
|
Use this overlay if you *don't* need a GPIO to drive an external pullup.
|
|
--- /dev/null
|
|
+++ b/arch/arm/boot/dts/overlays/vga666-overlay.dts
|
|
@@ -0,0 +1,30 @@
|
|
+/dts-v1/;
|
|
+/plugin/;
|
|
+
|
|
+/{
|
|
+ compatible = "brcm,bcm2708";
|
|
+
|
|
+ // There is no VGA 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 = <&vga666_pins>;
|
|
+ };
|
|
+ };
|
|
+
|
|
+ fragment@1 {
|
|
+ target = <&gpio>;
|
|
+ __overlay__ {
|
|
+ vga666_pins: vga666_pins {
|
|
+ brcm,pins = <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 */
|
|
+ };
|
|
+ };
|
|
+ };
|
|
+};
|