ARM: qemu: add support for qemu virt platform

Necessary support to boot barebox on ARM qemu virt platforms.
No internal device tree, since it is passed by qemu. Therefore it
employs the generic 2nd stage image as the low level code and only adds
a virt specific board driver.

Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

2 files changed, 37 insertions, 0 deletions

diff --git a/arch/arm/boards/qemu-virt/Makefile b/arch/arm/boards/qemu-virt/Makefile
new file mode 100644
index 0000000000..dcfc2937d3
--- /dev/null
+++ b/arch/arm/boards/qemu-virt/Makefile
@@ -0,0 +1 @@
+obj-y += board.o
diff --git a/arch/arm/boards/qemu-virt/board.c b/arch/arm/boards/qemu-virt/board.c
new file mode 100644
index 0000000000..3aeea1a017
--- /dev/null
+++ b/arch/arm/boards/qemu-virt/board.c
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2020 Pengutronix e.K.
+ *
+ */
+#include <common.h>
+#include <init.h>
+#include <asm/system_info.h>
+
+static int virt_probe(struct device_d *dev)
+{
+	char *hostname = "virt";
+
+	if (cpu_is_cortex_a7())
+		hostname = "virt-a7";
+	else if (cpu_is_cortex_a15())
+		hostname = "virt-a15";
+
+	barebox_set_model("ARM QEMU virt");
+	barebox_set_hostname(hostname);
+
+	return 0;
+}
+
+static const struct of_device_id virt_of_match[] = {
+	{ .compatible = "linux,dummy-virt" },
+	{ /* Sentinel */},
+};
+
+static struct driver_d virt_board_driver = {
+	.name = "board-qemu-virt",
+	.probe = virt_probe,
+	.of_compatible = virt_of_match,
+};
+
+postcore_platform_driver(virt_board_driver);