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-rw-r--r--arch/arm/boards/netgear-rn2120/lowlevel.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm/boards/netgear-rn2120/lowlevel.c b/arch/arm/boards/netgear-rn2120/lowlevel.c
new file mode 100644
index 0000000000..29c8b43c44
--- /dev/null
+++ b/arch/arm/boards/netgear-rn2120/lowlevel.c
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2015 Pengutronix, Uwe Kleine-K├Ânig <kernel@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2, as published by the Free Software Foundation.
+ *
+ * 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 <common.h>
+#include <asm/barebox-arm.h>
+#include <asm/barebox-arm-head.h>
+#include <asm/io.h>
+#include <mach/lowlevel.h>
+
+extern char __dtb_armada_xp_rn2120_bb_start[];
+
+ENTRY_FUNCTION(start_netgear_rn2120, r0, r1, r2)
+{
+ void *fdt;
+
+ arm_cpu_lowlevel_init();
+
+ /*
+ * This is necessary to allow the machine to draw more power. Probably
+ * connected to a TI TPS65251. Without this resetting a phy makes the
+ * SoC reset.
+ * This is effectively gpio_direction_output(42, 1);
+ */
+ writel((1 << 10) | readl((void *)0xd0018140), (void *)0xd0018140);
+ writel(~(1 << 10) & readl((void *)0xd0018144), (void *)0xd0018144);
+
+ fdt = __dtb_armada_xp_rn2120_bb_start -
+ get_runtime_offset();
+
+ mvebu_barebox_entry(fdt);
+}