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[ARM] Orion: add a separate BRIDGE_INT_TIMER1_CLR define 

Some Feroceon-based SoCs have an MBUS bridge interrupt controller
that requires writing a one instead of a zero to clear edge
interrupt sources such as timer expiry.

This patch adds a new BRIDGE_INT_TIMER1_CLR define, which platform
code can set to either ~BRIDGE_INT_TIMER1 (write-zero-to-clear) or
BRIDGE_INT_TIMER1 (write-one-to-clear) depending on the platform.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
This commit is contained in:
Ke Wei 2008-05-23 10:23:22 +02:00 committed by Lennert Buytenhek
parent ab6d15d506
commit 1219715de7
2 changed files with 4 additions and 3 deletions
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6
arch/arm/plat-orion/time.c
View File

@ -74,7 +74,7 @@ orion_clkevt_next_event(unsigned long delta, struct clock_event_device *dev)
/*
* Clear and enable clockevent timer interrupt.
*/
writel(~BRIDGE_INT_TIMER1, BRIDGE_CAUSE);
writel(BRIDGE_INT_TIMER1_CLR, BRIDGE_CAUSE);
u = readl(BRIDGE_MASK);
u |= BRIDGE_INT_TIMER1;
@ -138,7 +138,7 @@ orion_clkevt_mode(enum clock_event_mode mode, struct clock_event_device *dev)
/*
* ACK pending timer interrupt.
*/
writel(~BRIDGE_INT_TIMER1, BRIDGE_CAUSE);
writel(BRIDGE_INT_TIMER1_CLR, BRIDGE_CAUSE);
}
local_irq_restore(flags);
@ -159,7 +159,7 @@ static irqreturn_t orion_timer_interrupt(int irq, void *dev_id)
/*
* ACK timer interrupt and call event handler.
*/
writel(~BRIDGE_INT_TIMER1, BRIDGE_CAUSE);
writel(BRIDGE_INT_TIMER1_CLR, BRIDGE_CAUSE);
orion_clkevt.event_handler(&orion_clkevt);
return IRQ_HANDLED;

1
include/asm-arm/arch-orion5x/orion5x.h
View File

@ -154,6 +154,7 @@
#define BRIDGE_MASK ORION5X_BRIDGE_REG(0x114)
#define BRIDGE_INT_TIMER0 0x0002
#define BRIDGE_INT_TIMER1 0x0004
#define BRIDGE_INT_TIMER1_CLR (~0x0004)
#define MAIN_IRQ_CAUSE ORION5X_BRIDGE_REG(0x200)
#define MAIN_IRQ_MASK ORION5X_BRIDGE_REG(0x204)