linux-kernel - [PATCH v3 3/3] ARM: dts: rockchip: Allow wakeup from rk3288-veyron's dwc2 USB ports

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Message-Id: <20190520175605.2405-4-dianders@chromium.org>
Date:   Mon, 20 May 2019 10:56:05 -0700
From:   Douglas Anderson <dianders@...omium.org>
To:     Minas Harutyunyan <hminas@...opsys.com>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>, heiko@...ech.de
Cc:     Alan Stern <stern@...land.harvard.edu>,
        Artur Petrosyan <Arthur.Petrosyan@...opsys.com>,
        amstan@...omium.org, linux-rockchip@...ts.infradead.org,
        William Wu <william.wu@...k-chips.com>,
        linux-usb@...r.kernel.org, Stefan Wahren <stefan.wahren@...e.com>,
        Randy Li <ayaka@...lik.info>, zyw@...k-chips.com,
        mka@...omium.org, ryandcase@...omium.org,
        Amelie Delaunay <amelie.delaunay@...com>, jwerner@...omium.org,
        Elaine Zhang <zhangqing@...k-chips.com>,
        Douglas Anderson <dianders@...omium.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v3 3/3] ARM: dts: rockchip: Allow wakeup from rk3288-veyron's dwc2 USB ports

We want to be able to wake from USB if a device is plugged in that
wants remote wakeup.  Enable it on both dwc2 controllers.

NOTE: this is added specifically to veyron and not to rk3288 in
general since it's not known whether all rk3288 boards are designed to
support USB wakeup.  It is plausible that some boards could shut down
important rails in S3.

Also note that currently wakeup doesn't seem to happen unless you use
the "deep" suspend mode (where SDRAM is turned off).  Presumably the
shallow suspend mode is gating some sort of clock that's important but
I couldn't easily figure out how to get it working.

Signed-off-by: Douglas Anderson <dianders@...omium.org>
---

Changes in v3: None
Changes in v2:
- rk3288-veyron dts patch new for v2.

 arch/arm/boot/dts/rk3288-veyron.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/rk3288-veyron.dtsi b/arch/arm/boot/dts/rk3288-veyron.dtsi
index 1252522392c7..1d8bfed7830c 100644
--- a/arch/arm/boot/dts/rk3288-veyron.dtsi
+++ b/arch/arm/boot/dts/rk3288-veyron.dtsi
@@ -424,6 +424,7 @@
 
 &usb_host1 {
 	status = "okay";
+	snps,need-phy-for-wake;
 };
 
 &usb_otg {
@@ -432,6 +433,7 @@
 	assigned-clocks = <&cru SCLK_USBPHY480M_SRC>;
 	assigned-clock-parents = <&usbphy0>;
 	dr_mode = "host";
+	snps,need-phy-for-wake;
 };
 
 &vopb {
-- 
2.21.0.1020.gf2820cf01a-goog