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

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.comSigned-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent d8a1cb75
......@@ -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);
}
......@@ -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);
......
......@@ -55,6 +55,7 @@ struct irq_data;
enum irq_domain_bus_token {
DOMAIN_BUS_ANY = 0,
DOMAIN_BUS_PCI_MSI,
DOMAIN_BUS_PLATFORM_MSI,
};
/**
......
......@@ -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,
......
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