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irqchip: omap-intc: enable IP protection

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When PROTECTION bit in enabled in PROTECTION
register, INTC's registers are only accessible
from privileged mode.

Acked-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Felipe Balbi 2014-09-15 16:15:06 -05:00 committed by Tony Lindgren
parent 8bb3b375c8
commit 9836ee9f87
1 changed files with 20 additions and 2 deletions
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22
drivers/irqchip/irq-omap-intc.c
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@ -51,6 +51,8 @@
#define INTCPS_NR_ILR_REGS 128
#define INTCPS_NR_MIR_REGS 3
#define INTC_PROTECTION_ENABLE (1 << 0)
/*
* OMAP2 has a number of different interrupt controllers, each interrupt
* controller is identified as its own "bank". Register definitions are
@ -290,12 +292,28 @@ static int __init omap_init_irq_legacy(u32 base)
return 0;
}
static void __init omap_irq_enable_protection(void)
{
u32 reg;
reg = intc_readl(INTC_PROTECTION);
reg |= INTC_PROTECTION_ENABLE;
intc_writel(INTC_PROTECTION, reg);
}
static int __init omap_init_irq(u32 base, struct device_node *node)
{
int ret;
if (node)
return omap_init_irq_of(node);
ret = omap_init_irq_of(node);
else
return omap_init_irq_legacy(base);
ret = omap_init_irq_legacy(base);
if (ret == 0)
omap_irq_enable_protection();
return ret;
}
static asmlinkage void __exception_irq_entry