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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: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2019-01-27 14:05:53 +01:00
parent 167c6b5ece
commit f1497f3d06
1 changed files with 41 additions and 0 deletions
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41
drivers/irqchip/irq-ixp4xx.c
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@ -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