From: Sandeep Maheswaram <quic_c_sanm@quicinc.com>
To: Rob Herring <robh+dt@kernel.org>, Andy Gross <agross@kernel.org>,
"Bjorn Andersson" <bjorn.andersson@linaro.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Felipe Balbi <balbi@kernel.org>,
Stephen Boyd <swboyd@chromium.org>,
Doug Anderson <dianders@chromium.org>,
"Matthias Kaehlcke" <mka@chromium.org>,
Mathias Nyman <mathias.nyman@intel.com>
Cc: <devicetree@vger.kernel.org>, <linux-arm-msm@vger.kernel.org>,
<linux-usb@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<quic_pkondeti@quicinc.com>, <quic_ppratap@quicinc.com>,
Sandeep Maheswaram <quic_c_sanm@quicinc.com>
Subject: [PATCH v2 2/3] usb: host: xhci-plat: Add device property to set XHCI_SKIP_PHY_INIT quirk
Date: Mon, 8 Nov 2021 12:11:49 +0530 [thread overview]
Message-ID: <1636353710-25582-3-git-send-email-quic_c_sanm@quicinc.com> (raw)
In-Reply-To: <1636353710-25582-1-git-send-email-quic_c_sanm@quicinc.com>
Add device property usb-skip-phy-init to check and set XHCI_SKIP_PHY_INIT
quirk.
Runtime suspend of phy drivers was failing from DWC3 driver as
runtime usage value is 2 because the phy is initialized from
DWC3 core and HCD core.
Some controllers like DWC3 and CDNS3 manage phy in their core drivers.
This property can be set to avoid phy initialization in HCD core.
Signed-off-by: Sandeep Maheswaram <quic_c_sanm@quicinc.com>
---
drivers/usb/host/xhci-plat.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index c1edcc9..2a45f89 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -323,6 +323,9 @@ static int xhci_plat_probe(struct platform_device *pdev)
if (device_property_read_bool(tmpdev, "quirk-broken-port-ped"))
xhci->quirks |= XHCI_BROKEN_PORT_PED;
+ if (device_property_read_bool(tmpdev, "usb-skip-phy-init"))
+ xhci->quirks |= XHCI_SKIP_PHY_INIT;
+
device_property_read_u32(tmpdev, "imod-interval-ns",
&xhci->imod_interval);
}
--
2.7.4
next prev parent reply other threads:[~2021-11-08 6:42 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-08 6:41 [PATCH v2 0/3] Skip phy initialization for DWC3 USB Controllers Sandeep Maheswaram
2021-11-08 6:41 ` [PATCH v2 1/3] dt-bindings: usb: usb-xhci: Add bindings for usb-skip-phy-init property Sandeep Maheswaram
2021-11-12 22:47 ` Rob Herring
2021-11-16 10:41 ` Sandeep Maheswaram
2021-11-17 5:27 ` Pavan Kondeti
2021-11-23 11:17 ` Sandeep Maheswaram
2021-11-08 6:41 ` Sandeep Maheswaram [this message]
2021-11-08 6:41 ` [PATCH v2 3/3] usb: dwc3: host: Set the property usb-skip-phy-init Sandeep Maheswaram
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