diff options
author | Chin Liang See <clsee@altera.com> | 2013-08-07 10:08:03 -0500 |
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committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2013-09-06 12:09:06 +0200 |
commit | 68e1747f9c0506159e8ecc9a4feb58e9c65a7b39 (patch) | |
tree | c4b1a1ba9d50e05a3839b51a8f4cbeeb6762f3fd /arch/arm/cpu/armv7/socfpga/reset_manager.c | |
parent | 31ad864e47f03288bf1d4232913b38ddb624345c (diff) | |
download | talos-obmc-uboot-68e1747f9c0506159e8ecc9a4feb58e9c65a7b39.tar.gz talos-obmc-uboot-68e1747f9c0506159e8ecc9a4feb58e9c65a7b39.zip |
socfpga: Creating driver for Reset Manager
Consolidating reset code into reset_manager.c. Also
separating reset configuration for virtual target and
real hardware Cyclone V development kit
Signed-off-by: Chin Liang See <clsee@altera.com>
Reviewed-by: Pavel Machek <pavel@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Pavel Machek <pavel@denx.de>
Cc: Dinh Nguyen <dinguyen@altera.com>
Cc: Tom Rini <trini@ti.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Diffstat (limited to 'arch/arm/cpu/armv7/socfpga/reset_manager.c')
-rw-r--r-- | arch/arm/cpu/armv7/socfpga/reset_manager.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/socfpga/reset_manager.c b/arch/arm/cpu/armv7/socfpga/reset_manager.c new file mode 100644 index 0000000000..e320c011ae --- /dev/null +++ b/arch/arm/cpu/armv7/socfpga/reset_manager.c @@ -0,0 +1,39 @@ +/* + * Copyright (C) 2013 Altera Corporation <www.altera.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/reset_manager.h> + +DECLARE_GLOBAL_DATA_PTR; + +static const struct socfpga_reset_manager *reset_manager_base = + (void *)SOCFPGA_RSTMGR_ADDRESS; + +/* + * Write the reset manager register to cause reset + */ +void reset_cpu(ulong addr) +{ + /* request a warm reset */ + writel((1 << RSTMGR_CTRL_SWWARMRSTREQ_LSB), + &reset_manager_base->ctrl); + /* + * infinite loop here as watchdog will trigger and reset + * the processor + */ + while (1) + ; +} + +/* + * Release peripherals from reset based on handoff + */ +void reset_deassert_peripherals_handoff(void) +{ + writel(0, &reset_manager_base->per_mod_reset); +} |