fix four minor gaps: rtl8188eus udev rule, bfq scope, hostname, tsadc

Found during the live multi-device SSH sweep; none break a single device but
each is a real defect:

- linux-drivers/RTL8188EUS 99-rtl8188eus.rules: the RUN line used single `$`
  for its shell vars, which udev parses as its own specifier ("invalid
  substitution type") and rejects the whole rule, so the rtl8xxxu->8188eu
  rebind never ran (the dongle stayed on the better driver only by probe-order
  luck). Double them to `$$`.

- linux 10-bfq-sched.rules: `KERNEL=="mmcblk[0-9]*"` matched partitions too,
  whose queue/* knobs do not exist, spamming the boot log with ~15 ENOENT
  write failures. Gate on SUBSYSTEM=="block", DEVTYPE=="disk".

- hostname: system.cfg shipped `system.hostname=@DEVICENAME@` -> "RK3326" (the
  SoC name, identical on every unit), so two ArchR consoles on one LAN collide
  on NetBIOS/mDNS registration (nmbd "Failed to register my name"). Set the
  base name to "archr" and append a short per-device machine-id suffix in
  network-base-setup so each device is unique.

- tsadc: r3xs.dtsi and eeclone.dts enabled tsadc without
  rockchip,hw-tshut-mode/-polarity, so the driver logged "Missing tshut ...
  using default" on every boot. Spell out the defaults (CRU reset, active-low);
  behaviour unchanged. DTS compiles clean (eeclone + soysauce).

The "GO-Super Gamepad" joypad name on the Soysauce was investigated and is
intentional (soysauce.dts sets joypad-name with a matching retroarch config),
so it is left as-is.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

projects/ArchR/devices/RK3326/linux/dts/rockchip/rk3326-gameconsole-eeclone.dts

@@ -798,6 +798,14 @@
 
 &tsadc {
     status = "okay";
+    /*
+     * Explicit hardware thermal-shutdown config (CRU self-reset on
+     * over-temp, active-low) matching the driver defaults, to silence the
+     * "Missing tshut mode/polarity property" boot warning. No behaviour
+     * change.
+     */
+    rockchip,hw-tshut-mode = <0>;
+    rockchip,hw-tshut-polarity = <0>;
 };
 
 &u2phy {

projects/ArchR/devices/RK3326/linux/dts/rockchip/rk3326-gameconsole-r3xs.dtsi

@@ -471,6 +471,15 @@
 
 &tsadc {
 	status = "okay";
+	/*
+	 * Spell out the hardware thermal-shutdown config the driver otherwise
+	 * warns about ("Missing tshut mode/polarity property, using default"):
+	 * CRU self-reset on over-temp, active-low. These match the driver
+	 * defaults already in use, so behaviour is unchanged; this just makes
+	 * the config explicit and silences the boot warning.
+	 */
+	rockchip,hw-tshut-mode = <0>;
+	rockchip,hw-tshut-polarity = <0>;
 };
 
 &u2phy {

projects/ArchR/packages/archr/config/system/configs/system.cfg

@@ -179,7 +179,7 @@ system.autohotkeys=1
 system.automount=1
 system.battery.warning=0
 system.battery.warning_threshold=25
-system.hostname=@DEVICENAME@
+system.hostname=archr
 system.language=en_US
 enable.turbo-mode=1
 system.cpugovernor=ondemand

projects/ArchR/packages/linux-drivers/RTL8188EUS/udev.d/99-rtl8188eus.rules

@@ -31,6 +31,10 @@ LABEL="rtl8188eus_swap"
 # mesmo tempo); depois carrega 8188eu, que vai bindar pela alias
 # table. ${BUSNUM} e ${DEVNUM} são fornecidos por udev e identificam
 # o device USB sem ambiguidade.
-RUN+="/usr/bin/sh -c 'busid=$(basename %p); for drv in /sys/bus/usb/drivers/rtl8xxxu; do [ -e \"$drv/$busid\" ] && echo \"$busid\" > \"$drv/unbind\" 2>/dev/null; done; modprobe 8188eu 2>/dev/null'"
+# udev parses `$` in RUN as its own specifier prefix, so shell variables
+# must be doubled (`$$` -> literal `$`). The previous single-`$` form made
+# udev reject the whole rule ("invalid substitution type"), so the rebind
+# never ran and the dongle was left on rtl8xxxu by luck of probe order.
+RUN+="/usr/bin/sh -c 'busid=$$(basename %p); for drv in /sys/bus/usb/drivers/rtl8xxxu; do [ -e \"$$drv/$$busid\" ] && echo \"$$busid\" > \"$$drv/unbind\" 2>/dev/null; done; modprobe 8188eu 2>/dev/null'"
 
 LABEL="rtl8188eus_end"

projects/ArchR/packages/linux/udev.d/10-bfq-sched.rules

@@ -1,5 +1,9 @@
-ACTION=="add|change", KERNEL=="mmcblk[0-9]*", ATTR{queue/scheduler}="bfq"
-ACTION=="add|change", KERNEL=="mmcblk[0-9]*", ATTR{queue/iosched/low_latency}="1"
-ACTION=="add|change", KERNEL=="mmcblk[0-9]*", ATTR{queue/read_ahead_kb}="2048"
-ACTION=="add|change", KERNEL=="mmcblk[0-9]*", ATTR{queue/nr_requests}="128"
-ACTION=="add|change", KERNEL=="mmcblk[0-9]*", ATTR{queue/rq_affinity}="2"
+# Tune the I/O scheduler on the whole SD/eMMC disks. The queue/* knobs live
+# on the disk, not its partitions, so we gate on DEVTYPE=="disk": matching
+# `mmcblk[0-9]*` alone also hit mmcblk1p1/p2/p3 and spammed the boot log with
+# "Failed to write ATTR{.../queue/scheduler}: No such file or directory".
+ACTION=="add|change", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", KERNEL=="mmcblk[0-9]*", ATTR{queue/scheduler}="bfq"
+ACTION=="add|change", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", KERNEL=="mmcblk[0-9]*", ATTR{queue/iosched/low_latency}="1"
+ACTION=="add|change", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", KERNEL=="mmcblk[0-9]*", ATTR{queue/read_ahead_kb}="2048"
+ACTION=="add|change", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", KERNEL=="mmcblk[0-9]*", ATTR{queue/nr_requests}="128"
+ACTION=="add|change", SUBSYSTEM=="block", ENV{DEVTYPE}=="disk", KERNEL=="mmcblk[0-9]*", ATTR{queue/rq_affinity}="2"

projects/ArchR/packages/sysutils/systemd/scripts/network-base-setup

@@ -1,6 +1,14 @@
 #!/bin/sh
 . /etc/profile
 HOSTNAME=$(get_setting system.hostname)
+# Make the hostname unique per device. Multiple ArchR consoles on one LAN
+# otherwise share a name and collide on NetBIOS / mDNS registration (nmbd
+# "Failed to register my name ..."). Append a short, stable suffix derived
+# from the per-device machine-id (the same id the gadget uses for its
+# serial). Skip if no machine-id is available yet.
+MID="$(cat /storage/.cache/systemd-machine-id 2>/dev/null)"
+[ -z "${MID}" ] && MID="$(cat /etc/machine-id 2>/dev/null)"
+[ -n "${MID}" ] && HOSTNAME="${HOSTNAME}-$(echo "${MID}" | cut -c1-4)"
 echo ${HOSTNAME} >/proc/sys/kernel/hostname
 hostnamectl --transient hostname ${HOSTNAME}
 avahi-set-host-name ${HOSTNAME}