From: Miroslav Ondra <ondra@faster.cz>
Date: Mon, 19 Aug 2019 16:23:29 +0000 (+0200)
Subject: fix spi baudrate to 6MHz on arm64. H5 can set only 6MHz or 12MHz
X-Git-Url: http://git.graph-it.com/?a=commitdiff_plain;h=4096cf95485229d985efd260cb4fbee687ae2c80;p=graphit%2Funipi-kernel.git

fix spi baudrate to 6MHz on arm64. H5 can set only 6MHz or 12MHz
---

diff --git a/modules/unipi/src/unipi_common.h b/modules/unipi/src/unipi_common.h
index 603456b..5a79c20 100644
--- a/modules/unipi/src/unipi_common.h
+++ b/modules/unipi/src/unipi_common.h
@@ -64,7 +64,14 @@
 #define NEURONSPI_B_PER_WORD 			8
 #define NEURONSPI_DEFAULT_FREQ			600000
 #define NEURONSPI_COMMON_FREQ			12000000
-#define NEURONSPI_SLOWER_FREQ			7500000
+
+#if defined(CONFIG_ARM64)
+/* on NanoPi there are only 12MHz and 6MHz available, not in between */
+   #define NEURONSPI_SLOWER_FREQ			6000000
+#else
+   #define NEURONSPI_SLOWER_FREQ			7500000
+#endif
+
 #define NEURONSPI_MAX_TX				60
 //#define NEURONSPI_MAX_TX				256
 #define NEURONSPI_MAX_BAUD				115200