ARM: imx6: add Embest MarSBoard support

This board is produced by Embest/Element 14 and is based on i.MX6 Dual.

For more informations on this board :
http://www.embest-tech.com/shop/star/marsboard.html

Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Tested-by: Stefan Lengfeld <contact@stefanchrist.eu>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 41 insertions, 0 deletions

diff --git a/arch/arm/boards/embest-marsboard/lowlevel.c b/arch/arm/boards/embest-marsboard/lowlevel.c
new file mode 100644
index 0000000000..9e20a2ec06
--- /dev/null
+++ b/arch/arm/boards/embest-marsboard/lowlevel.c
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 Ahmad Fatoum - Pengutronix
+ */
+
+#include <common.h>
+#include <io.h>
+#include <asm/barebox-arm.h>
+#include <mach/imx6.h>
+#include <mach/esdctl.h>
+#include <mach/iomux-mx6.h>
+#include <debug_ll.h>
+
+static inline void setup_uart(void)
+{
+	void __iomem *iomuxbase = IOMEM(MX6_IOMUXC_BASE_ADDR);
+
+	imx6_ungate_all_peripherals();
+
+	imx_setup_pad(iomuxbase, MX6Q_PAD_EIM_D26__UART2_TXD);
+
+	imx6_uart_setup_ll();
+
+	putc_ll('>');
+}
+
+extern char __dtb_z_imx6q_marsboard_start[];
+
+ENTRY_FUNCTION(start_imx6q_marsboard, r0, r1, r2)
+{
+	void *fdt;
+
+	imx6_cpu_lowlevel_init();
+
+	if (IS_ENABLED(CONFIG_DEBUG_LL))
+		setup_uart();
+
+	fdt = __dtb_z_imx6q_marsboard_start + get_runtime_offset();
+
+	imx6q_barebox_entry(fdt);
+}