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Commit d7927e19 authored by Paulius Zaleckas's avatar Paulius Zaleckas Committed by Sascha Hauer
Browse files

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: default avatarPaulius Zaleckas <paulius.zaleckas@teltonika.lt>
Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
parent bd006a9b

arch/arm/plat-mxc/include/mach/irqs.h

+5 −0
Original line number Diff line number Diff line
@@ -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__ */

arch/arm/plat-mxc/irq.c

+29 −0
Original line number Diff line number Diff line
@@ -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");

}