usb: host: xhci-tegra: Tegra186/Tegra194 LPM

Tegra186 and Tegra194 xHC supports USB 3.0 LPM. This commit enables
XHCI_LPM_SUPPORT quirk for Tegra186 and Tegra194.

Signed-off-by: JC Kuo <jckuo@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20200312144517.1593-6-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c
index 8163aef..a6e36b3 100644 (file)
--- a/drivers/usb/host/xhci-tegra.c
+++ b/drivers/usb/host/xhci-tegra.c
@@ -203,6 +203,7 @@ struct tegra_xusb_soc {
 
        bool scale_ss_clock;
        bool has_ipfs;
+       bool lpm_support;
 };
 
 struct tegra_xusb_context {
@@ -1779,6 +1780,7 @@ static const struct tegra_xusb_soc tegra186_soc = {
                .data_out = 0xec,
                .owner = 0xf0,
        },
+       .lpm_support = true,
 };
 
 static const char * const tegra194_supply_names[] = {
@@ -1808,6 +1810,7 @@ static const struct tegra_xusb_soc tegra194_soc = {
                .data_out = 0x70,
                .owner = 0x74,
        },
+       .lpm_support = true,
 };
 MODULE_FIRMWARE("nvidia/tegra194/xusb.bin");
 
@@ -1832,7 +1835,11 @@ static struct platform_driver tegra_xusb_driver = {
 
 static void tegra_xhci_quirks(struct device *dev, struct xhci_hcd *xhci)
 {
+       struct tegra_xusb *tegra = dev_get_drvdata(dev);
+
        xhci->quirks |= XHCI_PLAT;
+       if (tegra && tegra->soc->lpm_support)
+               xhci->quirks |= XHCI_LPM_SUPPORT;
 }
 
 static int tegra_xhci_setup(struct usb_hcd *hcd)