configs,rpi4: quirk, override /etc/watchdogd.conf

Apparently the BCM2835 watchdog driver does not hook into /dev/watchdog
but creates its own /dev/watchdog0, and is very picky about interval and
timeout as well it seems.

Signed-off-by: Joachim Wiberg <[email protected]>

Author: troglobit

board/aarch64/rpi/rootfs/etc/watchdogd.conf

@@ -0,0 +1,6 @@
+# Broadcom BCM2835 Watchdog timer
+device /dev/watchdog0 {
+    timeout    = 60
+    interval   = 5
+    safe-exit  = true
+}

configs/rpi4_defconfig

@@ -23,7 +23,7 @@ BR2_SYSTEM_DEFAULT_PATH="/bin:/sbin:/usr/bin:/usr/sbin"
 BR2_ENABLE_LOCALE_WHITELIST="C en_US en_CA C.UTF-8"
 BR2_GENERATE_LOCALE="en_US en_CA C.UTF-8"
 BR2_TARGET_TZ_INFO=y
-BR2_ROOTFS_OVERLAY="${BR2_EXTERNAL_INFIX_PATH}/board/common/rootfs ${BR2_EXTERNAL_INFIX_PATH}/board/aarch64/rootfs"
+BR2_ROOTFS_OVERLAY="${BR2_EXTERNAL_INFIX_PATH}/board/common/rootfs ${BR2_EXTERNAL_INFIX_PATH}/board/aarch64/rootfs ${BR2_EXTERNAL_INFIX_PATH}/board/aarch64/rpi/rootfs"
 BR2_ROOTFS_POST_BUILD_SCRIPT="board/raspberrypi4-64/post-build.sh ${BR2_EXTERNAL_INFIX_PATH}/board/common/post-build.sh"
 BR2_ROOTFS_POST_IMAGE_SCRIPT="board/raspberrypi4-64/post-image.sh"
 BR2_LINUX_KERNEL=y