diff options
Diffstat (limited to 'arch/arm/plat-s3c24xx/irq.c')
| -rw-r--r-- | arch/arm/plat-s3c24xx/irq.c | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/arch/arm/plat-s3c24xx/irq.c b/arch/arm/plat-s3c24xx/irq.c index 958737775ad2..ad0d44ef1f93 100644 --- a/arch/arm/plat-s3c24xx/irq.c +++ b/arch/arm/plat-s3c24xx/irq.c @@ -1,6 +1,6 @@ /* linux/arch/arm/plat-s3c24xx/irq.c * - * Copyright (c) 2003,2004 Simtec Electronics + * Copyright (c) 2003-2004 Simtec Electronics * Ben Dooks <ben@simtec.co.uk> * * This program is free software; you can redistribute it and/or modify @@ -493,6 +493,40 @@ s3c_irq_demux_extint4t7(unsigned int irq, } } +#ifdef CONFIG_FIQ +/** + * s3c24xx_set_fiq - set the FIQ routing + * @irq: IRQ number to route to FIQ on processor. + * @on: Whether to route @irq to the FIQ, or to remove the FIQ routing. + * + * Change the state of the IRQ to FIQ routing depending on @irq and @on. If + * @on is true, the @irq is checked to see if it can be routed and the + * interrupt controller updated to route the IRQ. If @on is false, the FIQ + * routing is cleared, regardless of which @irq is specified. + */ +int s3c24xx_set_fiq(unsigned int irq, bool on) +{ + u32 intmod; + unsigned offs; + + if (on) { + offs = irq - FIQ_START; + if (offs > 31) + return -EINVAL; + + intmod = 1 << offs; + } else { + intmod = 0; + } + + __raw_writel(intmod, S3C2410_INTMOD); + return 0; +} + +EXPORT_SYMBOL_GPL(s3c24xx_set_fiq); +#endif + + /* s3c24xx_init_irq * * Initialise S3C2410 IRQ system @@ -505,6 +539,10 @@ void __init s3c24xx_init_irq(void) int irqno; int i; +#ifdef CONFIG_FIQ + init_FIQ(); +#endif + irqdbf("s3c2410_init_irq: clearing interrupt status flags\n"); /* first, clear all interrupts pending... */ |