From c09a13c13123f0d1f86025cfa0da62e9ed230ae4 Mon Sep 17 00:00:00 2001
From: Zhaoqi Xu <lzy00419@outlook.com>
Date: Fri, 30 Oct 2026 18:16:21 +0800
Subject: [PATCH] [bsp][dm365] reject zero max_hz in SPI setup to avoid
 divide-by-zero

---
 bsp/dm365/drivers/spi-davinci.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/bsp/dm365/drivers/spi-davinci.c b/bsp/dm365/drivers/spi-davinci.c
index 35de558e14ea..2aac181316d9 100644
--- a/bsp/dm365/drivers/spi-davinci.c
+++ b/bsp/dm365/drivers/spi-davinci.c
@@ -328,6 +328,12 @@ static int davinci_spi_setup_transfer(struct rt_spi_device *spi,
     } else
         return -RT_ERROR;
 
+    /* the prescaler divides by the requested rate */
+    if (hz == 0)
+    {
+        return -RT_EINVAL;
+    }
+
     /* Set up SPIFMTn register, unique to this chipselect. */
 
     prescale = davinci_spi_get_prescale(dspi, hz);