Driver compilation on Raspberry Pi (CM4) / Pi OS

I'm working on getting this thing working on a Raspberry Pi, running the latest version of Raspberry Pi OS:

$ uname -a
Linux cm4 5.10.52-v8+ #1441 SMP PREEMPT Tue Aug 3 18:14:03 BST 2021 aarch64 GNU/Linux

$ cat /etc/os-release
PRETTY_NAME="Debian GNU/Linux 10 (buster)"
NAME="Debian GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"
VERSION_CODENAME=buster
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

Right now the remake script fails with:

$ ./remake 
Could not locate kernel source for distribution 'debiangnu/linux'

But if I update the script to allow debian in addition to ubuntu:

diff --git a/Time-Card/DRV/remake b/Time-Card/DRV/remake
index 61e0c73..77ed189 100755
--- a/Time-Card/DRV/remake
+++ b/Time-Card/DRV/remake
@@ -10,7 +10,7 @@ if [ "$*" == "install" ]; then
 fi

 case "$DIST" in
-    ubuntu)
+    debian*|ubuntu)
         KDIR=/usr/src/linux-headers-${KVER}
         ;;
     centos*)

Then I get:

$ ./remake 
make: Entering directory '/usr/src/linux-headers-5.10.52-v8+'
  CC [M]  /home/pi/Time-Appliance-Project/Time-Card/DRV/ptp_ocp.o
/home/pi/Time-Appliance-Project/Time-Card/DRV/ptp_ocp.c:956:22: warning: ‘struct firmware’ declared inside parameter list will not be visible outside of this definition or declaration
         const struct firmware *fw)
                      ^~~~~~~~
/home/pi/Time-Appliance-Project/Time-Card/DRV/ptp_ocp.c: In function ‘ptp_ocp_devlink_flash’:
/home/pi/Time-Appliance-Project/Time-Card/DRV/ptp_ocp.c:968:12: error: dereferencing pointer to incomplete type ‘const struct firmware’
  resid = fw->size;
            ^~
/home/pi/Time-Appliance-Project/Time-Card/DRV/ptp_ocp.c: In function ‘ptp_ocp_devlink_flash_update’:
/home/pi/Time-Appliance-Project/Time-Card/DRV/ptp_ocp.c:1012:50: error: ‘struct devlink_flash_update_params’ has no member named ‘fw’
  err = ptp_ocp_devlink_flash(devlink, dev, params->fw);
                                                  ^~
make[1]: *** [scripts/Makefile.build:280: /home/pi/Time-Appliance-Project/Time-Card/DRV/ptp_ocp.o] Error 1
make: *** [Makefile:1824: /home/pi/Time-Appliance-Project/Time-Card/DRV] Error 2
make: Leaving directory '/usr/src/linux-headers-5.10.52-v8+'

opencomputeproject / Time-Appliance-Project

Driver compilation on Raspberry Pi (CM4) / Pi OS #23