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>
(cherry-picked from commit f07e572f64)

1 files changed, 51 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0754-overlays-gpio-shutdown-Add-information-for-SysV-init.patch b/target/linux/bcm27xx/patches-5.4/950-0754-overlays-gpio-shutdown-Add-information-for-SysV-init.patch
new file mode 100644
index 0000000000..ca0fd4942b
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0754-overlays-gpio-shutdown-Add-information-for-SysV-init.patch
@@ -0,0 +1,51 @@
+From 047041db91fabcb768c3e5680645b69fa9528e86 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org>
+Date: Thu, 30 Apr 2020 19:40:07 +0200
+Subject: [PATCH] overlays: gpio-shutdown: Add information for SysV
+ init / inittab
+
+KeyboardSignal and kb::kbrequest can be used to call /sbin/shutdown
+---
+ arch/arm/boot/dts/overlays/README | 24 ++++++++++++++++++++++++
+ 1 file changed, 24 insertions(+)
+
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -847,6 +847,7 @@ Params: gpiopin                 GPIO for
+ Name:   gpio-shutdown
+ Info:   Initiates a shutdown when GPIO pin changes. The given GPIO pin
+         is configured as an input key that generates KEY_POWER events.
++
+         This event is handled by systemd-logind by initiating a
+         shutdown. Systemd versions older than 225 need an udev rule
+         enable listening to the input device:
+@@ -855,6 +856,29 @@ Info:   Initiates a shutdown when GPIO p
+                         SUBSYSTEMS=="platform", DRIVERS=="gpio-keys", \
+                         ATTRS{keys}=="116", TAG+="power-switch"
+ 
++        Alternatively this event can be handled also on systems without
++        systemd, just by traditional SysV init daemon. KEY_POWER event
++        (keycode 116) needs to be mapped to KeyboardSignal on console
++        and then kb::kbrequest inittab action which is triggered by
++        KeyboardSignal from console can be configured to issue system
++        shutdown. Steps for this configuration are:
++
++            Add following lines to the /etc/console-setup/remap.inc file:
++
++                # Key Power as special keypress
++                keycode 116 = KeyboardSignal
++
++            Then add following lines to /etc/inittab file:
++
++                # Action on special keypress (Key Power)
++                kb::kbrequest:/sbin/shutdown -t1 -a -h -P now
++
++            And finally reload configuration by calling following commands:
++
++                # dpkg-reconfigure console-setup
++                # service console-setup reload
++                # init q
++
+         This overlay only handles shutdown. After shutdown, the system
+         can be powered up again by driving GPIO3 low. The default
+         configuration uses GPIO3 with a pullup, so if you connect a