linux-kernel - [tip:irq/core] of/platform: Assign MSI domain to platform device

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Message-ID: <tip-c706c239af5bc297b5fbf1adc715632e1c222f7a@git.kernel.org>
Date:	Wed, 29 Jul 2015 15:27:12 -0700
From:	tip-bot for Marc Zyngier <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	tglx@...utronix.de, marc.zyngier@....com, jason@...edaemon.net,
	wangyijing@...wei.com, hanjun.guo@...aro.org,
	linux-kernel@...r.kernel.org, majun258@...wei.com,
	bhelgaas@...gle.com, lorenzo.pieralisi@....com, hpa@...or.com,
	dhdang@....com, linux-arm-kernel@...ts.infradead.org,
	mingo@...nel.org, jiang.liu@...ux.intel.com
Subject: [tip:irq/core] of/platform: Assign MSI domain to platform device

Commit-ID:  c706c239af5bc297b5fbf1adc715632e1c222f7a
Gitweb:     http://git.kernel.org/tip/c706c239af5bc297b5fbf1adc715632e1c222f7a
Author:     Marc Zyngier <marc.zyngier@....com>
AuthorDate: Tue, 28 Jul 2015 14:46:15 +0100
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Thu, 30 Jul 2015 00:14:37 +0200

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: Marc Zyngier <marc.zyngier@....com>
Cc: <linux-arm-kernel@...ts.infradead.org>
Cc: Yijing Wang <wangyijing@...wei.com>
Cc: Ma Jun <majun258@...wei.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc: Duc Dang <dhdang@....com>
Cc: Hanjun Guo <hanjun.guo@...aro.org>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Jiang Liu <jiang.liu@...ux.intel.com>
Cc: Jason Cooper <jason@...edaemon.net>
Link: http://lkml.kernel.org/r/1438091186-10244-9-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 drivers/of/irq.c          | 21 +++++++++++++++++++++
 drivers/of/platform.c     |  1 +
 include/linux/irqdomain.h |  1 +
 include/linux/of_irq.h    |  1 +
 4 files changed, 24 insertions(+)

diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 3cf7a01..2956d72 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -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);
+}
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index ddf8e42..8a002d6 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -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);
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index 25e9e66..b4a74f7 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -55,6 +55,7 @@ struct irq_data;
 enum irq_domain_bus_token {
 	DOMAIN_BUS_ANY		= 0,
 	DOMAIN_BUS_PCI_MSI,
+	DOMAIN_BUS_PLATFORM_MSI,
 };
 
 /**
diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h
index d884929..4bcbd58 100644
--- a/include/linux/of_irq.h
+++ b/include/linux/of_irq.h
@@ -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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