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| author | Minghuan Lian <Minghuan.Lian@freescale.com> | 2015-10-16 15:19:20 +0800 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2015-11-02 15:38:39 -0600 |
| commit | bd33b87a9a15f8182e8c6a49f5413e7ef79372bf (patch) | |
| tree | aac2e79ae24033c2c68492bce857d87235344b98 /drivers/pci | |
| parent | 5192ec7b24dd78bd82fe554995b8889d317da0c1 (diff) | |
| download | linux-bd33b87a9a15f8182e8c6a49f5413e7ef79372bf.tar.bz2 | |
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')
| -rw-r--r-- | drivers/pci/host/pci-layerscape.c | 23 |
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 = { |