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, 50 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.15/950-0566-overlays-Additional-parameters-for-gpio-poweroff.patch b/target/linux/bcm27xx/patches-5.15/950-0566-overlays-Additional-parameters-for-gpio-poweroff.patch
new file mode 100644
index 0000000000..e6c7b5fd15
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.15/950-0566-overlays-Additional-parameters-for-gpio-poweroff.patch
@@ -0,0 +1,50 @@
+From ae5bd19ff96560fb75a75c7d2374bed60bbd9669 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.com>
+Date: Thu, 11 Nov 2021 10:24:02 +0000
+Subject: [PATCH] overlays: Additional parameters for gpio-poweroff
+
+The gpio-poweroff driver supports active-delay-ms and inactive-delay-ms
+properties. Add parameters to set these parameters - active_delay_ms
+and inactive_delay_ms.
+
+See: https://forums.raspberrypi.com/viewtopic.php?t=323508
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.com>
+---
+ arch/arm/boot/dts/overlays/README                    | 7 +++++++
+ arch/arm/boot/dts/overlays/gpio-poweroff-overlay.dts | 2 ++
+ 2 files changed, 9 insertions(+)
+
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -1155,6 +1155,11 @@ Info:   Drives a GPIO high or low on pow
+         or reboot). This also disables the ability to trigger a boot by driving
+         GPIO3 low.
+ 
++        The GPIO starts in an inactive state. At poweroff time it is driven
++        active for 100ms, then inactive for 100ms, then active again. It is
++        safe to remove the power at any point after the initial activation of
++        the GPIO.
++
+         Users of this overlay are required to provide an external mechanism to
+         switch off the power supply when signalled - failure to do so results
+         in a kernel BUG, increased power consumption and undefined behaviour.
+@@ -1170,6 +1175,8 @@ Params: gpiopin                 GPIO for
+         input                   Set if the gpio pin should be configured as
+                                 an input.
+         export                  Set to export the configured pin to sysfs
++        active_delay_ms         Initial GPIO active period (default 100)
++        inactive_delay_ms       Subsequent GPIO inactive period (default 100)
+         timeout_ms              Specify (in ms) how long the kernel waits for
+                                 power-down before issuing a WARN (default 3000).
+ 
+--- a/arch/arm/boot/dts/overlays/gpio-poweroff-overlay.dts
++++ b/arch/arm/boot/dts/overlays/gpio-poweroff-overlay.dts
+@@ -33,5 +33,7 @@
+ 		input =         <&power_ctrl>,"input?";
+ 		export =        <&power_ctrl>,"export?";
+ 		timeout_ms =    <&power_ctrl>,"timeout-ms:0";
++		active_delay_ms = <&power_ctrl>,"active-delay-ms:0";
++		inactive_delay_ms = <&power_ctrl>,"inactive-delay-ms:0";
+ 	};
+ };