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| author | Felipe Balbi <felipe.balbi@linux.intel.com> | 2017-04-04 22:32:25 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-04-12 13:41:19 +0300 |
| commit | ae3a3e209ef1e2fa7efac9bb54c6fe934755bff6 (patch) | |
| tree | e78c1b0a95a1c8d1e976c4d0a184213888975c6a /drivers/usb/dwc3 | |
| parent | 7bdf7bebbbedb2bfe1dc3bcad71acb77bf660113 (diff) | |
| download | linux-ae3a3e209ef1e2fa7efac9bb54c6fe934755bff6.tar.xz | |
usb: dwc3: host: pass quirk-broken-port-ped property for known broken revisions
[ Upstream commit e42a5dbb8a3d14f5a35bffa3bf7dcb87883f767a ]
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>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 f6533c68fed1..626d87d545fc 100644 --- a/drivers/usb/dwc3/host.c +++ b/drivers/usb/dwc3/host.c @@ -21,11 +21,12 @@ 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 = platform_get_irq_byname(dwc3_pdev, "host"); if (irq == -EPROBE_DEFER) @@ -89,8 +90,22 @@ 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"); |