linux-kernel - [PATCH 2/2] PCI: generic: Add set_msi

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Message-ID: <1415647480-3320-3-git-send-email-suravee.suthikulpanit@amd.com>
Date:	Mon, 10 Nov 2014 13:24:40 -0600
From:	<suravee.suthikulpanit@....com>
To:	<bhelgaas@...gle.com>
CC:	<liviu.dudau@....com>, <lorenzo.pieralisi@....com>,
	<will.deacon@....com>, <linux-pci@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>,
	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
Subject: [PATCH 2/2] PCI: generic: Add set_msi_parent callback

From: Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>

This patch implement set_msi_parent callback for PCI generic host controller.

Cc: Bjorn Helgass <bhelgaas@...gle.com>
Cc: Liviu Dudau <liviu.dudau@....com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
---
 drivers/pci/host/pci-host-generic.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/pci/host/pci-host-generic.c b/drivers/pci/host/pci-host-generic.c
index 036ab1b..f9bb97a 100644
--- a/drivers/pci/host/pci-host-generic.c
+++ b/drivers/pci/host/pci-host-generic.c
@@ -42,6 +42,7 @@ struct gen_pci {
 	struct pci_host_bridge			host;
 	struct gen_pci_cfg_windows		cfg;
 	struct list_head			resources;
+	struct msi_chip				*mchip;
 };
 
 #ifdef CONFIG_ARM
@@ -128,9 +129,19 @@ static int gen_pci_config_write(struct pci_bus *bus, unsigned int devfn,
 	return PCIBIOS_SUCCESSFUL;
 }
 
+static int gen_pci_set_msi_parent(struct pci_bus *bus)
+{
+	struct gen_pci *pci = bus_to_gen_pci(bus);
+
+	bus->msi = pci->mchip;
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
 static struct pci_ops gen_pci_ops = {
 	.read	= gen_pci_config_read,
 	.write	= gen_pci_config_write,
+	.set_msi_parent = gen_pci_set_msi_parent,
 };
 
 static const struct of_device_id gen_pci_of_match[] = {
@@ -313,6 +324,9 @@ static int gen_pci_probe(struct platform_device *pdev)
 		return err;
 	}
 
+	pci->mchip = of_pci_find_msi_chip_by_node(of_parse_phandle(np,
+						  "msi-parent", 0));
+
 #ifdef CONFIG_ARM
 	pci_common_init_dev(dev, &hw);
 #else
-- 
1.9.3

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