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arm: socfpga: reset: Add function to reset add peripherals

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Add socfpga_per_reset_all() function to reset all peripherals
but the L4 watchdog. This is needed in the SPL.

Signed-off-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Marek Vasut 2015-07-09 04:27:28 +02:00
parent 292260ca21
commit 3191611a05
2 changed files with 14 additions and 0 deletions
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1
arch/arm/mach-socfpga/include/mach/reset_manager.h
View file

@ -13,6 +13,7 @@ void reset_deassert_peripherals_handoff(void);
void socfpga_bridges_reset(int enable);
void socfpga_per_reset(u32 reset, int set);
void socfpga_per_reset_all(void);
struct socfpga_reset_manager {
u32 status;

13
arch/arm/mach-socfpga/reset_manager.c
View file

@ -39,6 +39,19 @@ void socfpga_per_reset(u32 reset, int set)
clrbits_le32(reg, 1 << RSTMGR_RESET(reset));
}
/*
* Assert reset on every peripheral but L4WD0.
* Watchdog must be kept intact to prevent glitches
* and/or hangs.
*/
void socfpga_per_reset_all(void)
{
const u32 l4wd0 = 1 << RSTMGR_RESET(SOCFPGA_RESET(L4WD0));
writel(~l4wd0, &reset_manager_base->per_mod_reset);
writel(0xffffffff, &reset_manager_base->per2_mod_reset);
}
/*
* Write the reset manager register to cause reset
*/