bcm27xx: add support for linux v5.15

Build system: x86_64
Build-tested: bcm2708, bcm2709, bcm2710, bcm2711
Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B

Signed-off-by: Marty Jones <mj8263788@gmail.com>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.15/950-0531-ARM-dts-Make-vcio-a-child-of-the-firmware-node.patch b/target/linux/bcm27xx/patches-5.15/950-0531-ARM-dts-Make-vcio-a-child-of-the-firmware-node.patch
new file mode 100644
index 0000000000..c1adbb8df3
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.15/950-0531-ARM-dts-Make-vcio-a-child-of-the-firmware-node.patch
@@ -0,0 +1,30 @@
+From 52186b585d8834085c14fc088f1a36cd6184365c Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.com>
+Date: Tue, 12 Oct 2021 09:59:54 +0100
+Subject: [PATCH] ARM: dts: Make vcio a child of the firmware node
+
+In order to resolve a potential startup order bug, the vcio driver has
+been rewritten as a platform driver that depends on a DT node for
+its instantiation and to locate the firmware driver.
+
+Add that DT node.
+
+See: https://github.com/raspberrypi/linux/issues/4620
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.com>
+---
+ arch/arm/boot/dts/bcm270x-rpi.dtsi | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+--- a/arch/arm/boot/dts/bcm270x-rpi.dtsi
++++ b/arch/arm/boot/dts/bcm270x-rpi.dtsi
+@@ -152,3 +152,9 @@
+ 		status = "disabled";
+ 	};
+ };
++
++&firmware {
++	vcio: vcio {
++		compatible = "raspberrypi,vcio";
++	};
++};