From b64bda7e4e0f133a753525ee399b455df89338cc Mon Sep 17 00:00:00 2001
From: suda-morris <362953310@qq.com>
Date: Thu, 26 Sep 2019 17:32:20 +0800
Subject: [PATCH] make psram workaround depend on chip revison

Since ESP32 revision 3, the PSRAM workaround is not needed.
---
 components/esp32/Kconfig | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/components/esp32/Kconfig b/components/esp32/Kconfig
index 8f9f5b5a8c..59c44f3669 100644
--- a/components/esp32/Kconfig
+++ b/components/esp32/Kconfig
@@ -138,7 +138,7 @@ config SPIRAM_MEMTEST
 
 config SPIRAM_CACHE_WORKAROUND
     bool "Enable workaround for bug in SPI RAM cache for Rev1 ESP32s"
-    depends on SPIRAM_USE_MEMMAP || SPIRAM_USE_CAPS_ALLOC || SPIRAM_USE_MALLOC
+    depends on (SPIRAM_USE_MEMMAP || SPIRAM_USE_CAPS_ALLOC || SPIRAM_USE_MALLOC) && (ESP32_REV_MIN < 3)
     default "y"
     help
         Revision 1 of the ESP32 has a bug that can cause a write to PSRAM not to take place in some situations
@@ -149,6 +149,8 @@ config SPIRAM_CACHE_WORKAROUND
         This will also not use any bits of newlib that are located in ROM, opting for a version that is compiled
         with the workaround and located in flash instead.
 
+        The workaround is not required for ESP32 revision 3 and above.
+
 config SPIRAM_MALLOC_ALWAYSINTERNAL
     int "Maximum malloc() size, in bytes, to always put in internal memory"
     depends on SPIRAM_USE_MALLOC