From f768e718911e03a4a20b65f984eaa9b09045e4cd Mon Sep 17 00:00:00 2001
From: Peter Chen <peter.chen@nxp.com>
Date: Fri, 18 Sep 2020 16:17:46 +0300
Subject: [PATCH] usb: host: xhci-plat: add priv quirk for skip PHY
initialization
Git-commit: f768e718911e03a4a20b65f984eaa9b09045e4cd
References: jsc#SLE-14911
Patch-mainline: v5.10-rc1
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>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
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
@@ -177,6 +177,8 @@ 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;
@@ -275,8 +277,7 @@ static int xhci_plat_probe(struct platfo
priv_match = dev_get_platdata(&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;
@@ -326,6 +327,9 @@ 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
@@ -1875,6 +1875,7 @@ 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)
unsigned int num_active_eps;
unsigned int limit_active_eps;