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Commit f800ab44 authored by Sascha Hauer's avatar Sascha Hauer Committed by Grant Likely
Browse files

[POWERPC] mpc5200: add interrupt type function 



Add a set_type function for external (GPIO) interrupts.

Signed-off-by: default avatarJuergen Beisert <j.beisert@pengutronix.de>
Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
parent bc775eac

arch/powerpc/platforms/52xx/mpc52xx_pic.c

+38 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 


#undef DEBUG



#include <linux/interrupt.h>

#include <linux/irq.h>

#include <linux/of.h>

#include <asm/io.h>
@@ -109,11 +110,48 @@ static void mpc52xx_extirq_ack(unsigned int virq) 
	io_be_setbit(&intr->ctrl, 27-l2irq);

}



static int mpc52xx_extirq_set_type(unsigned int virq, unsigned int flow_type)

{

	u32 ctrl_reg, type;

	int irq;

	int l2irq;



	irq = irq_map[virq].hwirq;

	l2irq = (irq & MPC52xx_IRQ_L2_MASK) >> MPC52xx_IRQ_L2_OFFSET;



	pr_debug("%s: irq=%x. l2=%d flow_type=%d\n", __func__, irq, l2irq, flow_type);



	switch (flow_type) {

	case IRQF_TRIGGER_HIGH:

		type = 0;

		break;

	case IRQF_TRIGGER_RISING:

		type = 1;

		break;

	case IRQF_TRIGGER_FALLING:

		type = 2;

		break;

	case IRQF_TRIGGER_LOW:

		type = 3;

		break;

	default:

		type = 0;

	}



	ctrl_reg = in_be32(&intr->ctrl);

	ctrl_reg &= ~(0x3 << (22 - (l2irq * 2)));

	ctrl_reg |= (type << (22 - (l2irq * 2)));

	out_be32(&intr->ctrl, ctrl_reg);



	return 0;

}



static struct irq_chip mpc52xx_extirq_irqchip = {

	.typename = " MPC52xx IRQ[0-3] ",

	.mask = mpc52xx_extirq_mask,

	.unmask = mpc52xx_extirq_unmask,

	.ack = mpc52xx_extirq_ack,

	.set_type = mpc52xx_extirq_set_type,

};



/*