From: Keith Packard <keithp@keithp.com>
Date: Sun, 13 Nov 2022 03:36:52 +0000 (-0800)
Subject: samd21: Limit SPI baud value to 1
X-Git-Tag: 1.9.13~1^2~26^2~15
X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=commitdiff_plain;h=1cdcaea940864bbe531b32f228bc169b50f4d3a9

samd21: Limit SPI baud value to 1

Keep speeds slow enough

Signed-off-by: Keith Packard <keithp@keithp.com>
---

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;