MLK-20099-1 ARM64: dts: use external osc as refclk on 8mm evk board

Use the external osc as the pcie refclk on 8mm evk
rev c board.
Create another -revb.dts for the back compatible usage.
Because that internal pll is used as pcie ref clock on
the rev b board in default.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/arch/arm64/boot/dts/freescale/fsl-imx8mm-evk-revb.dts b/arch/arm64/boot/dts/freescale/fsl-imx8mm-evk-revb.dts
new file mode 100644
index 000000000000..c2f89aa7002c
--- /dev/null
+++ b/arch/arm64/boot/dts/freescale/fsl-imx8mm-evk-revb.dts
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2018 NXP
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+/dts-v1/;
+
+#include "fsl-imx8mm-evk.dts"
+
+/ {
+	model = "FSL i.MX8MM EVK RevB board";
+};
+
+/*
+ * External OSC is used as PCIe REFCLK on RevC board.
+ * Use the -revb.dts file to distiguish the different
+ * HW design.
+ */
+&pcie0{
+	ext_osc = <0>;
+	status = "okay";
+};
+