[PATCH v8 03/32] arm: qemu: Add a devicetree file for qemu_arm

[Simon Glass]

This uses QEMU virt which creates its own devicetree.

Add an empty version of this file, so that we can at least build this
board when devicetrees are required.

Tested-by: Heinrich Schuchardt <heinrich.schuchardt at canaonical.com>
Signed-off-by: Simon Glass <sjg at chromium.org>
---

(no changes since v7)

Changes in v7:
- Switch to using an empty file for qemu virt

Changes in v6:
- Expand the commit message based on comments

 arch/arm/dts/Makefile      |  2 ++
 arch/arm/dts/qemu-arm.dts  | 11 +++++++++++
 configs/qemu_arm_defconfig |  1 +
 3 files changed, 14 insertions(+)
 create mode 100644 arch/arm/dts/qemu-arm.dts

diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 7f622fedbda..eaad3b679cc 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -1162,6 +1162,8 @@ dtb-$(CONFIG_TARGET_IMX8MM_CL_IOT_GATE_OPTEE) += imx8mm-cl-iot-gate-optee.dtb
 
 dtb-$(CONFIG_TARGET_EA_LPC3250DEVKITV2) += lpc3250-ea3250.dtb
 
+dtb-$(CONFIG_ARCH_QEMU) += qemu-arm.dtb
+
 targets += $(dtb-y)
 
 # Add any required device tree compiler flags here
diff --git a/arch/arm/dts/qemu-arm.dts b/arch/arm/dts/qemu-arm.dts
new file mode 100644
index 00000000000..230c630f04f
--- /dev/null
+++ b/arch/arm/dts/qemu-arm.dts
@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * Empty device tree for qemu_arm
+
+ * Copyright 2021 Google LLC
+ */
+
+/dts-v1/;
+
+/ {
+};
diff --git a/configs/qemu_arm_defconfig b/configs/qemu_arm_defconfig
index d4f6d0b4373..a644a5f3e79 100644
--- a/configs/qemu_arm_defconfig
+++ b/configs/qemu_arm_defconfig
@@ -5,6 +5,7 @@ CONFIG_SYS_MALLOC_LEN=0x1000000
 CONFIG_NR_DRAM_BANKS=1
 CONFIG_ENV_SIZE=0x40000
 CONFIG_ENV_SECT_SIZE=0x40000
+CONFIG_DEFAULT_DEVICE_TREE="qemu-arm"
 CONFIG_TARGET_QEMU_ARM_32BIT=y
 CONFIG_DEBUG_UART_BASE=0x9000000
 CONFIG_DEBUG_UART_CLOCK=0
-- 
2.34.1.173.g76aa8bc2d0-goog