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PCI: kirin: Add MSI support 

Add support for MSI to the kirin host controller driver, based
on the generic dwc infrastructure.

Signed-off-by: Xiaowei Song <songxiaowei@hisilicon.com>
Signed-off-by: Yao Chen <chenyao11@huawei.com>
[lorenzo.pieralisi@arm.com: updated commit log]
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
This commit is contained in:
Xiaowei Song 2018-07-11 16:09:46 +08:00 committed by Lorenzo Pieralisi
parent ce397d215c
commit 141cb3d4ee
1 changed files with 28 additions and 0 deletions
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28
drivers/pci/controller/dwc/pcie-kirin.c
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@ -430,6 +430,9 @@ static int kirin_pcie_host_init(struct pcie_port *pp)
{
kirin_pcie_establish_link(pp);
if (IS_ENABLED(CONFIG_PCI_MSI))
dw_pcie_msi_init(pp);
return 0;
}
@ -445,9 +448,34 @@ static const struct dw_pcie_host_ops kirin_pcie_host_ops = {
.host_init = kirin_pcie_host_init,
};
static int kirin_pcie_add_msi(struct dw_pcie *pci,
struct platform_device *pdev)
{
int irq;
if (IS_ENABLED(CONFIG_PCI_MSI)) {
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev,
"failed to get MSI IRQ (%d)\n", irq);
return irq;
}
pci->pp.msi_irq = irq;
}
return 0;
}
static int __init kirin_add_pcie_port(struct dw_pcie *pci,
struct platform_device *pdev)
{
int ret;
ret = kirin_pcie_add_msi(pci, pdev);
if (ret)
return ret;
pci->pp.ops = &kirin_pcie_host_ops;
return dw_pcie_host_init(&pci->pp);