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83 lines
2.4 KiB
Diff
83 lines
2.4 KiB
Diff
6 years ago
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From 8134311059a478a79f7c9c9d08163bafa972fd39 Mon Sep 17 00:00:00 2001
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From: Alexander Graf <agraf@suse.de>
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Date: Tue, 20 Feb 2018 17:36:21 +0100
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Subject: [PATCH 226/454] overlays: Add overlay for missing AUX interrupt
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controller support (#2391)
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Upstream Linux today does not support the AUX interrupt controller
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yet. To make sure it can use our device tree, add an overlay that
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reverts it to something upstream understands again.
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See: https://github.com/raspberrypi/firmware/issues/943
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Signed-off-by: Alexander Graf <agraf@suse.de>
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---
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arch/arm/boot/dts/overlays/Makefile | 1 +
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arch/arm/boot/dts/overlays/README | 7 ++++
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.../upstream-aux-interrupt-overlay.dts | 33 +++++++++++++++++++
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3 files changed, 41 insertions(+)
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create mode 100644 arch/arm/boot/dts/overlays/upstream-aux-interrupt-overlay.dts
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--- a/arch/arm/boot/dts/overlays/Makefile
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+++ b/arch/arm/boot/dts/overlays/Makefile
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@@ -122,6 +122,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
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tinylcd35.dtbo \
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uart0.dtbo \
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uart1.dtbo \
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+ upstream-aux-interrupt.dtbo \
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vc4-fkms-v3d.dtbo \
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vc4-kms-v3d.dtbo \
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vga666.dtbo \
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -1721,6 +1721,13 @@ Params: txd1_pin GPIO pin
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rxd1_pin GPIO pin for RXD1 (15, 33 or 41 - default 15)
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+Name: upstream-aux-interrupt
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+Info: Allow usage of downstream .dtb with upstream kernel by binding AUX
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+ devices directly to the shared AUX interrupt line.
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+Load: dtoverlay=upstream-aux-interrupt
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+Params: <None>
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+
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+
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Name: vc4-fkms-v3d
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Info: Enable Eric Anholt's DRM VC4 V3D driver on top of the dispmanx
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display stack.
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/upstream-aux-interrupt-overlay.dts
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@@ -0,0 +1,33 @@
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+// Overlay for missing AUX interrupt controller
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+// Instead we bind all AUX devices to the generic AUX interrupt line
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+/dts-v1/;
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+/plugin/;
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+
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+/ {
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+ compatible = "brcm,bcm2708";
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+
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+ fragment@0 {
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+ target = <&uart1>;
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+ __overlay__ {
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+ interrupt-parent = <&intc>;
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+ interrupts = <0x1 0x1d>;
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+ };
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+ };
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+
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+ fragment@1 {
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+ target = <&spi1>;
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+ __overlay__ {
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+ interrupt-parent = <&intc>;
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+ interrupts = <0x1 0x1d>;
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+ };
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+ };
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+
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+ fragment@2 {
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+ target = <&spi2>;
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+ __overlay__ {
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+ interrupt-parent = <&intc>;
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+ interrupts = <0x1 0x1d>;
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+ };
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+ };
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+};
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+
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