Index: m25p.c
===================================================================
RCS file: /cvsroot/src/sys/dev/spi/m25p.c,v
retrieving revision 1.18
diff -p -u -r1.18 m25p.c
--- m25p.c	14 May 2021 09:25:14 -0000	1.18
+++ m25p.c	15 May 2021 22:52:57 -0000
@@ -125,14 +125,17 @@ static int
 m25p_match(device_t parent, cfdata_t cf, void *aux)
 {
 	struct spi_attach_args *sa = aux;
+	uint32_t maxfreq;
 	int res;
 
 	res = spi_compatible_match(sa, cf, compat_data);
 	if (!res)
 		return res;
 
+	if (!prop_dictionary_get_uint32(sa->sa_prop, "spi-max-frequency", &maxfreq))
+		maxfreq = 20000000;
 	/* configure for 20MHz, which is the max for normal reads */
-	if (spi_configure(sa->sa_handle, SPI_MODE_0, 20000000))
+	if (spi_configure(sa->sa_handle, SPI_MODE_0, maxfreq))
 		res = 0;
 
 	return res;