ARM: imx: Add support for ZII RDU2 board

Add support for RDU2 board from Zodiac Inflight Innovations.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 53 insertions, 0 deletions

diff --git a/arch/arm/boards/zii-imx6q-rdu2/lowlevel.c b/arch/arm/boards/zii-imx6q-rdu2/lowlevel.c
new file mode 100644
index 0000000000..df35aaee15
--- /dev/null
+++ b/arch/arm/boards/zii-imx6q-rdu2/lowlevel.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2016 Zodiac Inflight Innovation
+ * Author: Andrey Smirnov <andrew.smirnov@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <debug_ll.h>
+#include <common.h>
+#include <mach/esdctl.h>
+#include <mach/generic.h>
+#include <mach/imx6.h>
+#include <asm/barebox-arm.h>
+
+static inline void setup_uart(void)
+{
+	void __iomem *iomuxbase = IOMEM(MX6_IOMUXC_BASE_ADDR);
+
+	imx6_ungate_all_peripherals();
+
+	writel(0x1b0b1, iomuxbase + 0x0650);
+	writel(3, iomuxbase + 0x0280);
+
+	writel(0x1b0b1, iomuxbase + 0x0654);
+	writel(3, iomuxbase + 0x0284);
+	writel(1, iomuxbase + 0x0920);
+
+	imx6_uart_setup_ll();
+
+	putc_ll('>');
+}
+
+extern char __dtb_imx6q_zii_rdu2_start[];
+
+ENTRY_FUNCTION(start_imx6q_zii_rdu2, r0, r1, r2)
+{
+	void *fdt = __dtb_imx6q_zii_rdu2_start;
+
+	imx6_cpu_lowlevel_init();
+
+	if (IS_ENABLED(CONFIG_DEBUG_LL))
+		setup_uart();
+
+	imx6q_barebox_entry(fdt - get_runtime_offset());
+}