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ARM: zynq: Introduce zynq_slcr_unlock() 

Call special function for unlocking SLCR.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek 2013-11-26 14:46:58 +01:00
parent 871c6971ec
commit 568800731a
1 changed files with 14 additions and 2 deletions
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16
arch/arm/mach-zynq/slcr.c
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@ -70,6 +70,18 @@ static int zynq_slcr_read(u32 *val, u32 offset)
return 0;
}
/**
* zynq_slcr_unlock - Unlock SLCR registers
*
* Return: a negative value on error, 0 on success
*/
static inline int zynq_slcr_unlock(void)
{
zynq_slcr_write(SLCR_UNLOCK_MAGIC, SLCR_UNLOCK_OFFSET);
return 0;
}
/**
* zynq_slcr_system_reset - Reset the entire system.
*/
@ -82,7 +94,7 @@ void zynq_slcr_system_reset(void)
* Note that this seems to require raw i/o
* functions or there's a lockup?
*/
writel(SLCR_UNLOCK_MAGIC, zynq_slcr_base + SLCR_UNLOCK_OFFSET);
zynq_slcr_unlock();
/*
* Clear 0x0F000000 bits of reboot status register to workaround
@ -166,7 +178,7 @@ int __init zynq_early_slcr_init(void)
np->data = (__force void *)zynq_slcr_base;
/* unlock the SLCR so that registers can be changed */
writel(SLCR_UNLOCK_MAGIC, zynq_slcr_base + SLCR_UNLOCK_OFFSET);
zynq_slcr_unlock();
pr_info("%s mapped to %p\n", np->name, zynq_slcr_base);