[PATCH 4/4] board: asus: transformer: add DTSI file for enabling UART over uSD slot

[Artur Kowalski]

It is required to set

CONFIG_DEVICE_TREE_INCLUDES="tegra20-asus-transformer-uart-usd.dtsi"

if CONFIG_TEGRA_ENABLE_UARTA (and only if) is enabled for U-Boot to
boot properly, otherwise only SPL will work, but U-Boot when trying
to use UART that wasn't enabled by SPL.

Signed-off-by: Artur Kowalski <arturkow2000 at gmail.com>
---

 .../tegra20-asus-transformer-uart-usd.dtsi    | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 arch/arm/dts/tegra20-asus-transformer-uart-usd.dtsi

diff --git a/arch/arm/dts/tegra20-asus-transformer-uart-usd.dtsi b/arch/arm/dts/tegra20-asus-transformer-uart-usd.dtsi
new file mode 100644
index 00000000000..accb086774c
--- /dev/null
+++ b/arch/arm/dts/tegra20-asus-transformer-uart-usd.dtsi
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR BSD-3-Clause
+
+/ {
+	chosen {
+		stdout-path = &uarta;
+	};
+
+	serial at 70006300 {
+		status = "disabled";
+	};
+
+	serial at 70006000 {
+		status = "okay";
+		clock-frequency = <216000000>;
+	};
+
+	sdhci at c8000400 {
+		status = "disabled";
+	};
+
+	pinmux at 70000014 {
+		pinmux {
+			/delete-node/ sdb;
+
+			dbguart {
+				nvidia,pins = "sdb", "sdd";
+				nvidia,function = "uarta";
+			};
+		};
+	};
+};
-- 
2.48.1