[RFC 2/4] dwc3: host: Set xhci quirk for LPM if a platform supports it

[Pratyush Anand]

If a platform supports LPM then enable quirk in XHCI for the same.

Signed-off-by: Pratyush Anand <pratyush.an...@st.com>
---
 drivers/usb/dwc3/core.c | 1 +
 drivers/usb/dwc3/core.h | 1 +
 drivers/usb/dwc3/host.c | 2 ++
 3 files changed, 4 insertions(+)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 358375e..119dea3 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -490,6 +490,7 @@ static int dwc3_probe(struct platform_device *pdev)
                dwc->maximum_speed = DWC3_DCFG_SUPERSPEED;
 
        dwc->needs_fifo_resize = of_property_read_bool(node, "tx-fifo-resize");
+       dwc->lpm_capable = of_property_read_bool(node, "lpm-capable");
 
        pm_runtime_enable(dev);
        pm_runtime_get_sync(dev);
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 27dad99..f7bf6da 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -725,6 +725,7 @@ struct dwc3 {
        unsigned                setup_packet_pending:1;
        unsigned                delayed_status:1;
        unsigned                needs_fifo_resize:1;
+       unsigned                lpm_capable:1;
        unsigned                resize_fifos:1;
        unsigned                pullups_connected:1;
 
diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
index a362ed9..38b5c41 100644
--- a/drivers/usb/dwc3/host.c
+++ b/drivers/usb/dwc3/host.c
@@ -86,6 +86,8 @@ int dwc3_host_init(struct dwc3 *dwc)
        hcd = platform_get_drvdata(xhci);
        xhci_dev = hcd_to_xhci(hcd);
        xhci_dev->shared_hcd->phy = dwc->usb3_phy;
+       if (dwc->lpm_capable)
+               xhci_dev->quirks |= XHCI_LPM_SUPPORT;
 
        return 0;
 
-- 
1.8.1.2

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