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PCI: layerscape: Add ls_pcie_msi_host_init()

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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>
This commit is contained in:
Minghuan Lian 2015-10-16 15:19:20 +08:00 committed by Bjorn Helgaas
parent 5192ec7b24
commit bd33b87a9a
1 changed files with 23 additions and 0 deletions
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23
drivers/pci/host/pci-layerscape.c
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@ -150,14 +150,37 @@ static void ls_pcie_host_init(struct pcie_port *pp)
iowrite32(0, pcie->dbi + PCIE_DBI_RO_WR_EN); 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 = { static struct pcie_host_ops ls1021_pcie_host_ops = {
.link_up = ls1021_pcie_link_up, .link_up = ls1021_pcie_link_up,
.host_init = ls1021_pcie_host_init, .host_init = ls1021_pcie_host_init,
.msi_host_init = ls_pcie_msi_host_init,
}; };
static struct pcie_host_ops ls_pcie_host_ops = { static struct pcie_host_ops ls_pcie_host_ops = {
.link_up = ls_pcie_link_up, .link_up = ls_pcie_link_up,
.host_init = ls_pcie_host_init, .host_init = ls_pcie_host_init,
.msi_host_init = ls_pcie_msi_host_init,
}; };
static struct ls_pcie_drvdata ls1021_drvdata = { static struct ls_pcie_drvdata ls1021_drvdata = {