bcm27xx: import latest patches from the RPi foundation

bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G

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

1 files changed, 32 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0858-overlays-Fix-miniuart-bt-krnbt-parameter.patch b/target/linux/bcm27xx/patches-5.4/950-0858-overlays-Fix-miniuart-bt-krnbt-parameter.patch
new file mode 100644
index 0000000000..f7edf8a5b5
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0858-overlays-Fix-miniuart-bt-krnbt-parameter.patch
@@ -0,0 +1,32 @@
+From 2d54451c77c85e153046baebdfedeabc224a59d7 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.com>
+Date: Thu, 2 Jul 2020 15:21:05 +0100
+Subject: [PATCH] overlays: Fix miniuart-bt "krnbt" parameter
+
+Although superficially appealing, an overlay parameter that targets a
+label in the base DTB is not currently supported. Instead it is
+necessary to create a fragment targeting the label which is patched
+by the parameter.
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.com>
+---
+ arch/arm/boot/dts/overlays/miniuart-bt-overlay.dts | 8 +++++++-
+ 1 file changed, 7 insertions(+), 1 deletion(-)
+
+--- a/arch/arm/boot/dts/overlays/miniuart-bt-overlay.dts
++++ b/arch/arm/boot/dts/overlays/miniuart-bt-overlay.dts
+@@ -81,7 +81,13 @@
+ 		};
+ 	};
+ 
++	fragment@7 {
++		target = <&minibt>;
++		minibt_frag: __overlay__ {
++		};
++	};
++
+ 	__overrides__ {
+-		krnbt = <&minibt>,"status";
++		krnbt = <&minibt_frag>,"status";
+ 	};
+ };