From b3720f80c772a275f71327f04cc35ab1c2c918ec Mon Sep 17 00:00:00 2001
From: suda-morris <362953310@qq.com>
Date: Thu, 10 Oct 2019 11:38:14 +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 8c60767c6..9245420f5 100644
--- a/components/esp32/Kconfig
+++ b/components/esp32/Kconfig
@@ -155,7 +155,7 @@ menu "ESP32-specific"
 
         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
@@ -166,6 +166,8 @@ menu "ESP32-specific"
                 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_BANKSWITCH_ENABLE
             bool "Enable bank switching for >4MiB external RAM"
             default y