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Commit f1497f3d authored by Linus Walleij's avatar Linus Walleij
Browse files

irqchip: ixp4xx: Add OF initialization support 



This adds support for probing and settin up the IXP4xx
irqchip from device tree.

Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Acked-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 167c6b5e

drivers/irqchip/irq-ixp4xx.c

+41 −0
Original line number Diff line number Diff line
@@ -15,6 +15,9 @@ 
#include <linux/irqchip.h>

#include <linux/irqchip/irq-ixp4xx.h>

#include <linux/irqdomain.h>

#include <linux/of.h>

#include <linux/of_address.h>

#include <linux/of_irq.h>

#include <linux/platform_device.h>

#include <linux/cpu.h>
@@ -360,3 +363,41 @@ void __init ixp4xx_irq_init(resource_size_t irqbase, 
	}

}

EXPORT_SYMBOL_GPL(ixp4xx_irq_init);



#ifdef CONFIG_OF

int __init ixp4xx_of_init_irq(struct device_node *np,

			      struct device_node *parent)

{

	struct ixp4xx_irq *ixi = &ixirq;

	void __iomem *base;

	struct fwnode_handle *fwnode;

	bool is_356;

	int ret;



	base = of_iomap(np, 0);

	if (!base) {

		pr_crit("IXP4XX: could not ioremap interrupt controller\n");

		return -ENODEV;

	}

	fwnode = of_node_to_fwnode(np);



	/* These chip variants have 64 interrupts */

	is_356 = of_device_is_compatible(np, "intel,ixp43x-interrupt") ||

		of_device_is_compatible(np, "intel,ixp45x-interrupt") ||

		of_device_is_compatible(np, "intel,ixp46x-interrupt");



	ret = ixp4xx_irq_setup(ixi, base, fwnode, is_356);

	if (ret)

		pr_crit("IXP4XX: failed to set up irqchip\n");



	return ret;

}

IRQCHIP_DECLARE(ixp42x, "intel,ixp42x-interrupt",

		ixp4xx_of_init_irq);

IRQCHIP_DECLARE(ixp43x, "intel,ixp43x-interrupt",

		ixp4xx_of_init_irq);

IRQCHIP_DECLARE(ixp45x, "intel,ixp45x-interrupt",

		ixp4xx_of_init_irq);

IRQCHIP_DECLARE(ixp46x, "intel,ixp46x-interrupt",

		ixp4xx_of_init_irq);

#endif