From 7bc401647e53c1a34c65508d26c492b8514570cf Mon Sep 17 00:00:00 2001
From: Andrew Dunai <a@dun.ai>
Date: Mon, 9 Dec 2024 14:54:11 +0200
Subject: [PATCH] fix(hal): force spiTransaction to update clock line
 immediately (backport of espressif#9333)

---
 cores/esp32/esp32-hal-spi.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/cores/esp32/esp32-hal-spi.c b/cores/esp32/esp32-hal-spi.c
index 43ea98b9608..c635b836e8e 100644
--- a/cores/esp32/esp32-hal-spi.c
+++ b/cores/esp32/esp32-hal-spi.c
@@ -1135,6 +1135,11 @@ void spiTransaction(spi_t * spi, uint32_t clockDiv, uint8_t dataMode, uint8_t bi
         spi->dev->ctrl.wr_bit_order = 1;
         spi->dev->ctrl.rd_bit_order = 1;
     }
+#if CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S3
+    // Sync new config with hardware, backported from https://github.com/espressif/arduino-esp32/pull/9333
+    spi->dev->cmd.update = 1;
+    while (spi->dev->cmd.update);
+#endif
 }
 
 void spiSimpleTransaction(spi_t * spi)