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| author | Felipe Balbi <felipe.balbi@linux.intel.com> | 2017-01-26 11:17:37 +0200 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2017-01-26 11:17:37 +0200 |
| commit | e42a5dbb8a3d14f5a35bffa3bf7dcb87883f767a (patch) | |
| tree | 8444c587ac4351063297e0c07969980c0b63bae7 /drivers/usb/dwc3 | |
| parent | 4fe160d51e4226a80f81b3d9b5193e0b8d2ebcbd (diff) | |
| download | linux-e42a5dbb8a3d14f5a35bffa3bf7dcb87883f767a.tar.bz2 | |
usb: dwc3: host: pass quirk-broken-port-ped property for known broken revisions
dwc3 revisions <=3.00a have a limitation where Port Disable command
doesn't work. Set the quirk-broken-port-ped property for such
controllers so XHCI core can do the necessary workaround.
[rogerq@ti.com] Updated code from platform data to device property.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc3')
| -rw-r--r-- | drivers/usb/dwc3/host.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c index 487f0ff6ae25..76f0b0df37c1 100644 --- a/drivers/usb/dwc3/host.c +++ b/drivers/usb/dwc3/host.c @@ -54,11 +54,12 @@ out: int dwc3_host_init(struct dwc3 *dwc) { - struct property_entry props[2]; + struct property_entry props[3]; struct platform_device *xhci; int ret, irq; struct resource *res; struct platform_device *dwc3_pdev = to_platform_device(dwc->dev); + int prop_idx = 0; irq = dwc3_host_get_irq(dwc); if (irq < 0) @@ -97,8 +98,22 @@ int dwc3_host_init(struct dwc3 *dwc) memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props)); - if (dwc->usb3_lpm_capable) { - props[0].name = "usb3-lpm-capable"; + if (dwc->usb3_lpm_capable) + props[prop_idx++].name = "usb3-lpm-capable"; + + /** + * WORKAROUND: dwc3 revisions <=3.00a have a limitation + * where Port Disable command doesn't work. + * + * The suggested workaround is that we avoid Port Disable + * completely. + * + * This following flag tells XHCI to do just that. + */ + if (dwc->revision <= DWC3_REVISION_300A) + props[prop_idx++].name = "quirk-broken-port-ped"; + + if (prop_idx) { ret = platform_device_add_properties(xhci, props); if (ret) { dev_err(dwc->dev, "failed to add properties to xHCI\n"); |