diff options
Diffstat (limited to 'drivers/usb/host/uhci-platform.c')
| -rw-r--r-- | drivers/usb/host/uhci-platform.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/usb/host/uhci-platform.c b/drivers/usb/host/uhci-platform.c index 32a6f3d8deec..1b4e086c33a0 100644 --- a/drivers/usb/host/uhci-platform.c +++ b/drivers/usb/host/uhci-platform.c @@ -15,7 +15,9 @@ static int uhci_platform_init(struct usb_hcd *hcd) { struct uhci_hcd *uhci = hcd_to_uhci(hcd); - uhci->rh_numports = uhci_count_ports(hcd); + /* Probe number of ports if not already provided by DT */ + if (!uhci->rh_numports) + uhci->rh_numports = uhci_count_ports(hcd); /* Set up pointers to to generic functions */ uhci->reset_hc = uhci_generic_reset_hc; @@ -63,6 +65,7 @@ static const struct hc_driver uhci_platform_hc_driver = { static int uhci_hcd_platform_probe(struct platform_device *pdev) { + struct device_node *np = pdev->dev.of_node; struct usb_hcd *hcd; struct uhci_hcd *uhci; struct resource *res; @@ -98,6 +101,23 @@ static int uhci_hcd_platform_probe(struct platform_device *pdev) uhci->regs = hcd->regs; + /* Grab some things from the device-tree */ + if (np) { + u32 num_ports; + + if (of_property_read_u32(np, "#ports", &num_ports) == 0) { + uhci->rh_numports = num_ports; + dev_info(&pdev->dev, + "Detected %d ports from device-tree\n", + num_ports); + } + if (of_device_is_compatible(np, "aspeed,ast2400-uhci") || + of_device_is_compatible(np, "aspeed,ast2500-uhci")) { + uhci->is_aspeed = 1; + dev_info(&pdev->dev, + "Enabled Aspeed implementation workarounds\n"); + } + } ret = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_SHARED); if (ret) goto err_rmr; |