bcm27xx: update distroconfig.txt for faster RPi4

Newer RPi 4 Rev 6 (8 GB models and recent 2 GB / 4 GB models) ship with
the so-called C0 processor which can run turbo mode at 1.8 GHz max rather
than 1.5 GHz gracefully.  Add 'arm_boost=1' to pi4 section of to enable.

Note that this setting has no effect on older chips; they continue with
their 1.5 GHz max unless users overclock them.

Ref: https://www.raspberrypi.com/news/bullseye-bonus-1-8ghz-raspberry-pi-4

Signed-off-by: John Audia <graysky@archlinux.us>

diff --git a/target/linux/bcm27xx/image/distroconfig.txt b/target/linux/bcm27xx/image/distroconfig.txt
index 54cf44346fa03189df28705e1fc2786a994ef01d..103c5d2e828470d80aaec0a46e129f6af70371f1 100644 (file)
--- a/target/linux/bcm27xx/image/distroconfig.txt
+++ b/target/linux/bcm27xx/image/distroconfig.txt
@@ -12,3 +12,5 @@ dtoverlay=disable-bt
 dtoverlay=disable-bt
 [pi4]
 dtoverlay=disable-bt
+# Run as fast as firmware / board allows
+arm_boost=1