[PATCH 5.4 31/65] usb: host: xhci-plat: add priv quirk for skip PHY initialization

Greg Kroah-Hartman
2021-02-08T16:31:13Z

From: Peter Chen <peter.chen@nxp.com>

commit f768e718911e03a4a20b65f984eaa9b09045e4cd upstream.

Some DRD controllers (eg, dwc3 & cdns3) have PHY management at
their own driver to cover both device and host mode, so add one
priv quirk for such users to skip PHY management from HCD core.

Reviewed-by: Jun Li <jun.li@nxp.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20200918131752.16488-5-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/usb/host/xhci-plat.c | 8 ++++++--
drivers/usb/host/xhci.h | 1 +
2 files changed, 7 insertions(+), 2 deletions(-)

--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -163,6 +163,8 @@ static int xhci_plat_probe(struct platfo
struct usb_hcd *hcd;
int ret;
int irq;
+ struct xhci_plat_priv *priv = NULL;
+

if (usb_disabled())
return -ENODEV;
@@ -257,8 +259,7 @@ static int xhci_plat_probe(struct platfo

priv_match = of_device_get_match_data(&pdev->dev);
if (priv_match) {
- struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
-
+ priv = hcd_to_xhci_priv(hcd);
/* Just copy data for now */
if (priv_match)
*priv = *priv_match;
@@ -307,6 +308,9 @@ static int xhci_plat_probe(struct platfo

hcd->tpl_support = of_usb_host_tpl_support(sysdev->of_node);
xhci->shared_hcd->tpl_support = hcd->tpl_support;
+ if (priv && (priv->quirks & XHCI_SKIP_PHY_INIT))
+ hcd->skip_phy_initialization = 1;
+
ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
if (ret)
goto disable_usb_phy;
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1873,6 +1873,7 @@ struct xhci_hcd {
#define XHCI_DEFAULT_PM_RUNTIME_ALLOW BIT_ULL(33)
#define XHCI_RESET_PLL_ON_DISCONNECT BIT_ULL(34)
#define XHCI_SNPS_BROKEN_SUSPEND BIT_ULL(35)
+#define XHCI_SKIP_PHY_INIT BIT_ULL(37)
#define XHCI_DISABLE_SPARSE BIT_ULL(38)

unsigned int num_active_eps;