DTS: Add imx6q-display5-u-boot.dtsi file with u-boot specific properties

This file setups UART5 based serial to be used as pre-relocation
console in the U-Boot proper.

On purpose pinux configuration is omitted here as it has been already
done in SPL. For early pre-relocation code we only need the serial
device from DTS.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Peng Fan <peng.fan@nxp.com>

diff --git a/arch/arm/dts/imx6q-display5-u-boot.dtsi b/arch/arm/dts/imx6q-display5-u-boot.dtsi
new file mode 100644 (file)
index 0000000..b942218
--- /dev/null
+++ b/arch/arm/dts/imx6q-display5-u-boot.dtsi
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2019
+ * Lukasz Majewski, DENX Software Engineering, lukma@denx.de
+ *
+ * SPDX-License-Identifier:     GPL-2.0+ or X11
+ */
+
+/*
+ * The minimal augmentation DTS U-Boot file to allow UART5
+ * configuration in the pre-relocation stage of U-Boot
+ * proper.
+ *
+ * As the same UART is already configured in SPL, we don't need
+ * setup pinmux for it again.
+ */
+
+/ {
+       aliases {
+               mmc0 = &usdhc4;
+       };
+
+       soc {
+               u-boot,dm-pre-reloc;
+
+               aips-bus@2100000 {
+                       u-boot,dm-pre-reloc;
+               };
+       };
+
+       chosen {
+               stdout-path = &uart5;
+       };
+};
+
+&i2c3 {
+       at24@50 {
+               u-boot,i2c-offset-len = <2>;
+       };
+};
+
+&uart5 {
+       u-boot,dm-pre-reloc;
+};