diff options
Diffstat (limited to 'arch/arm/boards/netgear-rn2120/lowlevel.c')
-rw-r--r-- | arch/arm/boards/netgear-rn2120/lowlevel.c | 41 |
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-König <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); +} |