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patch-mxc-fiq 

Drivers which are going to use it will have to select it and use
mxc_set_irq_fiq() to set FIQ mode for this interrupt.

Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Paulius Zaleckas 2008-11-14 11:01:39 +01:00 committed by Sascha Hauer
parent bd006a9bfe
commit d7927e1916
2 changed files with 34 additions and 0 deletions
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5
arch/arm/plat-mxc/include/mach/irqs.h
View File

@ -14,4 +14,9 @@
#include <mach/hardware.h>
extern void imx_irq_set_priority(unsigned char irq, unsigned char prio);
/* all normal IRQs can be FIQs */
#define FIQ_START 0
/* switch betwean IRQ and FIQ */
extern int mxc_set_irq_fiq(unsigned int irq, unsigned int type);
#endif /* __ASM_ARCH_MXC_IRQS_H__ */

29
arch/arm/plat-mxc/irq.c
View File

@ -17,9 +17,11 @@
* 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>
#define AVIC_BASE IO_ADDRESS(AVIC_BASE_ADDR)
#define AVIC_INTCNTL (AVIC_BASE + 0x00) /* int control reg */
@ -65,6 +67,28 @@ 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_MAX_INT_LINES)
return -EINVAL;
if (irq < MXC_MAX_INT_LINES / 2) {
irqt = __raw_readl(AVIC_INTTYPEL) & ~(1 << irq);
__raw_writel(irqt | (!!type << irq), AVIC_INTTYPEL);
} else {
irq -= MXC_MAX_INT_LINES / 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)
{
@ -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");
}