Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 9836ee9f authored by Felipe Balbi's avatar Felipe Balbi Committed by Tony Lindgren
Browse files

irqchip: omap-intc: enable IP protection 



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

Acked-by: default avatarJason Cooper <jason@lakedaemon.net>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent 8bb3b375

drivers/irqchip/irq-omap-intc.c

+20 −2
Original line number Diff line number Diff line
@@ -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