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of/platform: Assign MSI domain to platform device

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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: Marc Zyngier <[email protected]>
Cc: <[email protected]>
Cc: Yijing Wang <[email protected]>
Cc: Ma Jun <[email protected]>
Cc: Lorenzo Pieralisi <[email protected]>
Cc: Duc Dang <[email protected]>
Cc: Hanjun Guo <[email protected]>
Cc: Bjorn Helgaas <[email protected]>
Cc: Jiang Liu <[email protected]>
Cc: Jason Cooper <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>
This commit is contained in:
Marc Zyngier 2015-07-28 14:46:15 +01:00 • committed by Thomas Gleixner
commit c706c239af
4 changed files with 24 additions and 0 deletions
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21
drivers/of/irq.c
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@ -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 @@ err:
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);
}

1
drivers/of/platform.c
View file

@ -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);