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Commit c706c239 authored by Marc Zyngier's avatar Marc Zyngier Committed by Thomas Gleixner
Browse files

of/platform: Assign MSI domain to platform device 



As for PCI, we're able to populate the msi_domain field at probe time,
provided that the device tree has an "msi-parent" property.

Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
Cc: <linux-arm-kernel@lists.infradead.org>
Cc: Yijing Wang <wangyijing@huawei.com>
Cc: Ma Jun <majun258@huawei.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Duc Dang <dhdang@apm.com>
Cc: Hanjun Guo <hanjun.guo@linaro.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Link: http://lkml.kernel.org/r/1438091186-10244-9-git-send-email-marc.zyngier@arm.com


Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent d8a1cb75

drivers/of/irq.c

+21 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
 * driver.

 */



#include <linux/device.h>

#include <linux/errno.h>

#include <linux/list.h>

#include <linux/module.h>
@@ -576,3 +577,23 @@ void __init of_irq_init(const struct of_device_id *matches) 
		kfree(desc);

	}

}



/**

 * of_msi_configure - Set the msi_domain field of a device

 * @dev: device structure to associate with an MSI irq domain

 * @np: device node for that device

 */

void of_msi_configure(struct device *dev, struct device_node *np)

{

	struct device_node *msi_np;

	struct irq_domain *d;



	msi_np = of_parse_phandle(np, "msi-parent", 0);

	if (!msi_np)

		return;



	d = irq_find_matching_host(msi_np, DOMAIN_BUS_PLATFORM_MSI);

	if (!d)

		d = irq_find_host(msi_np);

	dev_set_msi_domain(dev, d);

}

drivers/of/platform.c

+1 −0
Original line number Diff line number Diff line
@@ -184,6 +184,7 @@ static struct platform_device *of_platform_device_create_pdata( 
	dev->dev.bus = &platform_bus_type;

	dev->dev.platform_data = platform_data;

	of_dma_configure(&dev->dev, dev->dev.of_node);

	of_msi_configure(&dev->dev, dev->dev.of_node);



	if (of_device_add(dev) != 0) {

		of_dma_deconfigure(&dev->dev);

include/linux/irqdomain.h

+1 −0
Original line number Diff line number Diff line
@@ -55,6 +55,7 @@ struct irq_data; 
enum irq_domain_bus_token {

	DOMAIN_BUS_ANY		= 0,

	DOMAIN_BUS_PCI_MSI,

	DOMAIN_BUS_PLATFORM_MSI,

};



/**

include/linux/of_irq.h

+1 −0
Original line number Diff line number Diff line
@@ -74,6 +74,7 @@ static inline int of_irq_to_resource_table(struct device_node *dev, 
 */

extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);

extern struct device_node *of_irq_find_parent(struct device_node *child);

extern void of_msi_configure(struct device *dev, struct device_node *np);



#else /* !CONFIG_OF */

static inline unsigned int irq_of_parse_and_map(struct device_node *dev,