From 55ce05f270523fe0a05b5f6ca1af6da03a8ff1a9 Mon Sep 17 00:00:00 2001
From: LiPeng <lipeng@espressif.com>
Date: Mon, 1 Sep 2025 15:32:59 +0800
Subject: [PATCH] bugfix: Fix support for idf versions lower than 5.3

---
 osal/idf/usb_config.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/osal/idf/usb_config.h b/osal/idf/usb_config.h
index 76fdd397..34795f26 100644
--- a/osal/idf/usb_config.h
+++ b/osal/idf/usb_config.h
@@ -28,7 +28,12 @@
 
 // #define CONFIG_USB_DCACHE_ENABLE
 
-/* attribute data into no cache ram */
+/* attribute data into no cache ram 
+* DRAM_DMA_ALIGNED_ATTR was introduced in IDF 5.3. If not defined, it falls back to DMA_ATTR
+*/
+#ifndef DRAM_DMA_ALIGNED_ATTR
+#define DRAM_DMA_ALIGNED_ATTR DMA_ATTR
+#endif
 #define USB_NOCACHE_RAM_SECTION DRAM_DMA_ALIGNED_ATTR
 
 /* use usb_memcpy default for high performance but cost more flash memory.