From b7c72fe5eede5d5601ab7196c75556402fcf388f Mon Sep 17 00:00:00 2001
From: liquidraver <504870+liquidraver@users.noreply.github.com>
Date: Thu, 11 Jun 2026 13:58:08 +0200
Subject: [PATCH] route CAD_DONE/CAD_DETECTED to DIO1 so LR1110 LBT CAD
 completes (radio2 audit)

---
 .gitignore                                               | 2 ++
 .../patches/zephyr-new/drivers/lora/lr11xx/lr11xx_lora.c | 9 ++++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index a2f8706..f9a697b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -108,3 +108,5 @@ usb_companion_probe.py
 CORE_MESH_AUDIT_INDEX.md
 UPLINK_AUDIT_INDEX.md
 GPS_AUDIT_INDEX.md
+UI_AUDIT_INDEX.md
+RADIO2_AUDIT_INDEX.md
diff --git a/zephcore/patches/zephyr-new/drivers/lora/lr11xx/lr11xx_lora.c b/zephcore/patches/zephyr-new/drivers/lora/lr11xx/lr11xx_lora.c
index 9f9f316..b6ba6c6 100644
--- a/zephcore/patches/zephyr-new/drivers/lora/lr11xx/lr11xx_lora.c
+++ b/zephcore/patches/zephyr-new/drivers/lora/lr11xx/lr11xx_lora.c
@@ -265,7 +265,14 @@ static void lr11xx_apply_modem_config(struct lr11xx_data *data,
 		ctx,
 		LR11XX_SYSTEM_IRQ_RX_DONE | LR11XX_SYSTEM_IRQ_TX_DONE |
 		LR11XX_SYSTEM_IRQ_TIMEOUT | LR11XX_SYSTEM_IRQ_CRC_ERROR |
-		LR11XX_SYSTEM_IRQ_HEADER_ERROR,
+		LR11XX_SYSTEM_IRQ_HEADER_ERROR |
+		/* CAD_DONE/CAD_DETECTED MUST be redirected to DIO1 or the blocking
+		 * LBT CAD (run before every TX, cad.mode=LBT) never completes — its
+		 * semaphore is signaled from the DIO1 handler, so without this the
+		 * CAD times out (~200ms) every TX and LBT is dead. The SDK redirects
+		 * no IRQ to DIO by default; the SX126x driver keeps these in its mask
+		 * too. CAD_DONE only sets during a CAD op, so it's inert during RX. */
+		LR11XX_SYSTEM_IRQ_CAD_DONE | LR11XX_SYSTEM_IRQ_CAD_DETECTED,
 		0);
 }