From ab32a2cd2b7472966b309521d80b15488393af0e Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 9 Apr 2026 10:42:47 +0000
Subject: Clarify STM32U0 delay-default frequency usage

Agent-Logs-Url: https://github.com/hathach/tinyusb/sessions/3ec0d5b6-cb8e-48ff-8606-3371beb1efcb

Co-authored-by: HiFiPhile <4375114+HiFiPhile@users.noreply.github.com>
---
 src/portable/st/stm32_fsdev/fsdev_stm32.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src')

diff --git a/src/portable/st/stm32_fsdev/fsdev_stm32.h b/src/portable/st/stm32_fsdev/fsdev_stm32.h
index a6827cc60..5950efbe3 100644
--- a/src/portable/st/stm32_fsdev/fsdev_stm32.h
+++ b/src/portable/st/stm32_fsdev/fsdev_stm32.h
@@ -146,6 +146,7 @@
   #elif CFG_TUSB_MCU == OPT_MCU_STM32U3
     #define FSDEV_STM32_CPU_MHZ 96U
   #elif CFG_TUSB_MCU == OPT_MCU_STM32U0
+    // Used by STM32 FSDEV PMA delay defaults as a conservative max CPU frequency.
     #define FSDEV_STM32_CPU_MHZ 56U
   #elif CFG_TUSB_MCU == OPT_MCU_STM32G0
     #define FSDEV_STM32_CPU_MHZ 64U
-- 
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