Re: [PATCH 7/7] arm64: dts: exynos: Add initial E850-96 board support

E850-96 is a 96boards development board manufactured by WinLink. It
incorporates Samsung Exynos850 SoC, and is compatible with 96boards
mezzanine boards [1], as it follows 96boards standards.

This patch adds minimal support for E850-96 board. Next features are
enabled in board dts file and verified with minimal BusyBox rootfs:

 * User buttons
 * LEDs
 * Serial console
 * Watchdog timers
 * RTC
 * eMMC

[1] https://www.96boards.org/products/mezzanine/

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
---
 arch/arm64/boot/dts/exynos/Makefile           |   3 +-
 .../boot/dts/exynos/exynos850-e850-96.dts     | 157 ++++++++++++++++++
 2 files changed, 159 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm64/boot/dts/exynos/exynos850-e850-96.dts

diff --git a/arch/arm64/boot/dts/exynos/Makefile b/arch/arm64/boot/dts/exynos/Makefile
index b41e86df0a84..803548ccc537 100644
--- a/arch/arm64/boot/dts/exynos/Makefile
+++ b/arch/arm64/boot/dts/exynos/Makefile

@@ -3,4 +3,5 @@ dtb-$(CONFIG_ARCH_EXYNOS) += \
 	exynos5433-tm2.dtb	\
 	exynos5433-tm2e.dtb	\
 	exynos7-espresso.dtb	\
-	exynosautov9-sadk.dtb
+	exynosautov9-sadk.dtb	\
+	exynos850-e850-96.dtb

diff --git a/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
new file mode 100644
index 000000000000..fd611906d81c
--- /dev/null
+++ b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts

@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * WinLink E850-96 board device tree source
+ *
+ * Copyright (C) 2018 Samsung Electronics Co., Ltd.
+ * Copyright (C) 2021 Linaro Ltd.
+ *
+ * Device tree source file for WinLink's E850-96 board which is based on
+ * Samsung Exynos850 SoC.
+ */
+
+/dts-v1/;
+
+#include "exynos850.dtsi"
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+#define BOARD_ID	0x0
+#define BOARD_REV	0x2
+
+/ {
+	model = "WinLink E850-96 board";
+	compatible = "winlink,e850-96", "samsung,exynos850";
+	board_id = <BOARD_ID>;
+	board_rev = <BOARD_REV>;
+
+	chosen {
+		stdout-path = &serial_0;
+	};
+