From 1cdcaea940864bbe531b32f228bc169b50f4d3a9 Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Sat, 12 Nov 2022 19:36:52 -0800
Subject: [PATCH] samd21: Limit SPI baud value to 1

Keep speeds slow enough

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 src/samd21/ao_arch_funcs.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/samd21/ao_arch_funcs.h b/src/samd21/ao_arch_funcs.h
index beb8d126..32670b45 100644
--- a/src/samd21/ao_arch_funcs.h
+++ b/src/samd21/ao_arch_funcs.h
@@ -286,8 +286,8 @@ ao_spi_speed(uint32_t hz)
 {
 	int32_t	baud = (int32_t) (AO_SYSCLK / (2 * hz)) - 1;
 
-	if (baud < 0)
-		baud = 0;
+	if (baud < 1)
+		baud = 1;
 	if (baud > 255)
 		baud = 255;
 	return (uint8_t) baud;
-- 
2.30.2