diff options
Diffstat (limited to 'arch/arm/plat-mxc/irq.c')
| -rw-r--r-- | arch/arm/plat-mxc/irq.c | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/arch/arm/plat-mxc/irq.c b/arch/arm/plat-mxc/irq.c index d862c9e5f8db..6e7578a3514b 100644 --- a/arch/arm/plat-mxc/irq.c +++ b/arch/arm/plat-mxc/irq.c @@ -17,9 +17,12 @@ * MA 02110-1301, USA. */ +#include <linux/module.h> #include <linux/irq.h> #include <linux/io.h> #include <mach/common.h> +#include <asm/mach/irq.h> +#include <mach/hardware.h> #define AVIC_BASE IO_ADDRESS(AVIC_BASE_ADDR) #define AVIC_INTCNTL (AVIC_BASE + 0x00) /* int control reg */ @@ -65,6 +68,28 @@ void imx_irq_set_priority(unsigned char irq, unsigned char prio) EXPORT_SYMBOL(imx_irq_set_priority); #endif +#ifdef CONFIG_FIQ +int mxc_set_irq_fiq(unsigned int irq, unsigned int type) +{ + unsigned int irqt; + + if (irq >= MXC_INTERNAL_IRQS) + return -EINVAL; + + if (irq < MXC_INTERNAL_IRQS / 2) { + irqt = __raw_readl(AVIC_INTTYPEL) & ~(1 << irq); + __raw_writel(irqt | (!!type << irq), AVIC_INTTYPEL); + } else { + irq -= MXC_INTERNAL_IRQS / 2; + irqt = __raw_readl(AVIC_INTTYPEH) & ~(1 << irq); + __raw_writel(irqt | (!!type << irq), AVIC_INTTYPEH); + } + + return 0; +} +EXPORT_SYMBOL(mxc_set_irq_fiq); +#endif /* CONFIG_FIQ */ + /* Disable interrupt number "irq" in the AVIC */ static void mxc_mask_irq(unsigned int irq) { @@ -91,7 +116,6 @@ static struct irq_chip mxc_avic_chip = { void __init mxc_init_irq(void) { int i; - u32 reg; /* put the AVIC into the reset value with * all interrupts disabled @@ -106,7 +130,7 @@ void __init mxc_init_irq(void) /* all IRQ no FIQ */ __raw_writel(0, AVIC_INTTYPEH); __raw_writel(0, AVIC_INTTYPEL); - for (i = 0; i < MXC_MAX_INT_LINES; i++) { + for (i = 0; i < MXC_INTERNAL_IRQS; i++) { set_irq_chip(i, &mxc_avic_chip); set_irq_handler(i, handle_level_irq); set_irq_flags(i, IRQF_VALID); @@ -119,5 +143,10 @@ void __init mxc_init_irq(void) /* init architectures chained interrupt handler */ mxc_register_gpios(); +#ifdef CONFIG_FIQ + /* Initialize FIQ */ + init_FIQ(); +#endif + printk(KERN_INFO "MXC IRQ initialized\n"); } |