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authorMinghuan Lian <Minghuan.Lian@freescale.com>2015-10-16 15:19:20 +0800
committerBjorn Helgaas <bhelgaas@google.com>2015-11-02 15:38:39 -0600
commitbd33b87a9a15f8182e8c6a49f5413e7ef79372bf (patch)
treeaac2e79ae24033c2c68492bce857d87235344b98 /drivers/pci/host
parent5192ec7b24dd78bd82fe554995b8889d317da0c1 (diff)
PCI: layerscape: Add ls_pcie_msi_host_init()
Layerscape PCIe has its own MSI implementation. Register ls_pcie_msi_host_init() to avoid using DesignWare's MSI. [bhelgaas: add comment] Signed-off-by: Minghuan Lian <Minghuan.Lian@freescale.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/host')
-rw-r--r--drivers/pci/host/pci-layerscape.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/pci/host/pci-layerscape.c b/drivers/pci/host/pci-layerscape.c
index 0f6dd4456409..3923bed93c7e 100644
--- a/drivers/pci/host/pci-layerscape.c
+++ b/drivers/pci/host/pci-layerscape.c
@@ -150,14 +150,37 @@ static void ls_pcie_host_init(struct pcie_port *pp)
iowrite32(0, pcie->dbi + PCIE_DBI_RO_WR_EN);
}
+static int ls_pcie_msi_host_init(struct pcie_port *pp,
+ struct msi_controller *chip)
+{
+ struct device_node *msi_node;
+ struct device_node *np = pp->dev->of_node;
+
+ /*
+ * The MSI domain is set by the generic of_msi_configure(). This
+ * .msi_host_init() function keeps us from doing the default MSI
+ * domain setup in dw_pcie_host_init() and also enforces the
+ * requirement that "msi-parent" exists.
+ */
+ msi_node = of_parse_phandle(np, "msi-parent", 0);
+ if (!msi_node) {
+ dev_err(pp->dev, "failed to find msi-parent\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static struct pcie_host_ops ls1021_pcie_host_ops = {
.link_up = ls1021_pcie_link_up,
.host_init = ls1021_pcie_host_init,
+ .msi_host_init = ls_pcie_msi_host_init,
};
static struct pcie_host_ops ls_pcie_host_ops = {
.link_up = ls_pcie_link_up,
.host_init = ls_pcie_host_init,
+ .msi_host_init = ls_pcie_msi_host_init,
};
static struct ls_pcie_drvdata ls1021_drvdata = {