From cb7dd37f781ffa161b0db3e3872ee25689d4348e Mon Sep 17 00:00:00 2001
From: Stuart Ianna <stuart.ianna@motec.com.au>
Date: Fri, 5 Apr 2024 15:02:25 +1100
Subject: [PATCH] system/spi: Set SPI delay characteristics to zero when
 enabled.

Previously, when delay control was enabled, spi_transfer would pass junk
values down to the underlying driver because these values where not
initialized.

Setting them to zero provides a predictable result considering they are
not controlled by this tool.
---
 system/spi/spi_exch.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/system/spi/spi_exch.c b/system/spi/spi_exch.c
index 31db5d83e..1a898484e 100644
--- a/system/spi/spi_exch.c
+++ b/system/spi/spi_exch.c
@@ -154,6 +154,13 @@ int spicmd_exch(FAR struct spitool_s *spitool, int argc, FAR char **argv)
   seq.ntrans = 1;
   seq.trans = &trans;
 
+#ifdef CONFIG_SPI_DELAY_CONTROL
+  seq.a = 0;
+  seq.b = 0;
+  seq.i = 0;
+  seq.c = 0;
+#endif
+
   trans.deselect = true;
 #ifdef CONFIG_SPI_CMDDATA
   trans.cmd = spitool->command;