[openwrt/openwrt] wifi-scripts: add hotplug handler for slow-to-initialize ath12k radios

[LEDE Commits]

ansuel pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/6bbf4a540dcb7d66ef35ca8c9739c2f71e9a149d

commit 6bbf4a540dcb7d66ef35ca8c9739c2f71e9a149d
Author: Mantas Pucka <mantas at 8devices.com>
AuthorDate: Fri Apr 4 12:46:58 2025 +0300

    wifi-scripts: add hotplug handler for slow-to-initialize ath12k radios
    
    Some ath12k radios can take long time to initialize and register a
    phy. This can cause netifd to fail to detect them during initial scan.
    To address this issue, a hotplug script has been added to retry
    configuration once they have registered their phy.
    
    Signed-off-by: Mantas Pucka <mantas at 8devices.com>
    Link: https://github.com/openwrt/openwrt/pull/18459
    Signed-off-by: Christian Marangi <ansuelsmth at gmail.com>
---
 .../etc/hotplug.d/ieee80211/11-ath12k-trigger      | 36 ++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/package/network/config/wifi-scripts/files/etc/hotplug.d/ieee80211/11-ath12k-trigger b/package/network/config/wifi-scripts/files/etc/hotplug.d/ieee80211/11-ath12k-trigger
new file mode 100755
index 0000000000..3c07e52882
--- /dev/null
+++ b/package/network/config/wifi-scripts/files/etc/hotplug.d/ieee80211/11-ath12k-trigger
@@ -0,0 +1,36 @@
+#!/bin/sh
+
+# Restart ath12k radios that take long time to initialize on boot
+
+[ "${ACTION}" = "add" ] || exit 0
+[ $(grep -c DRIVER=ath12k_pci /sys/$DEVPATH/device/uevent) -gt 0 ] || exit 0
+
+. /usr/share/libubox/jshn.sh
+
+restart_radio() {
+	radio=$1
+	arg="{\"radio\": \"$radio\"}"
+	ubus call network reload
+	ubus call network.wireless down "$arg"
+	ubus call network.wireless up "$arg"
+}
+
+json_init
+json_load "$(ubus -S call network.wireless status)"
+json_get_keys radios
+for radio in $radios; do
+	json_select $radio
+	json_get_vars up
+	json_get_vars retry_setup_failed
+
+	json_select config
+	json_get_vars path
+	json_select ..
+
+	if [ $up = 0 -a $retry_setup_failed = 1 ] &&
+	   [ $(iwinfo nl80211 phyname "path=$path") = "$DEVICENAME" ]; then
+		restart_radio $radio
+	fi
+
+	json_select ..
+done