linux-kernel - Re: [PATCH v7 9/9] arm64: dts: qcom: sa8540-ride: Enable first port of tertiary usb controller

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Message-ID: <20230504200659.aphlfmk5przvfthi@halaney-x13s>
Date:   Thu, 4 May 2023 15:06:59 -0500
From:   Andrew Halaney <ahalaney@...hat.com>
To:     Krishna Kurapati PSSNV <quic_kriskura@...cinc.com>
Cc:     Konrad Dybcio <konrad.dybcio@...aro.org>,
        Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Felipe Balbi <balbi@...nel.org>,
        Wesley Cheng <quic_wcheng@...cinc.com>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        quic_pkondeti@...cinc.com, quic_ppratap@...cinc.com,
        quic_jackp@...cinc.com, quic_harshq@...cinc.com,
        quic_shazhuss@...cinc.com
Subject: Re: [PATCH v7 9/9] arm64: dts: qcom: sa8540-ride: Enable first port
 of tertiary usb controller

nit I just noticed: s/sa8540-ride/sa8540p-ride/
please during the next spin!

On Thu, May 04, 2023 at 11:33:44PM +0530, Krishna Kurapati PSSNV wrote:
> 
> 
> On 5/2/2023 4:37 PM, Konrad Dybcio wrote:
> > 
> > 
> > On 1.05.2023 16:34, Krishna Kurapati wrote:
> > > There is now support for the multiport USB controller this uses so
> > > enable it.
> > > 
> > > The board only has a single port hooked up (despite it being wired up to
> > > the multiport IP on the SoC). There's also a USB 2.0 mux hooked up,
> > > which by default on boot is selected to mux properly. Grab the gpio
> > > controlling that and ensure it stays in the right position so USB 2.0
> > > continues to be routed from the external port to the SoC.
> > > 
> > > Signed-off-by: Andrew Halaney <ahalaney@...hat.com>
> > > Signed-off-by: Krishna Kurapati <quic_kriskura@...cinc.com>
> > > ---
> > same comments as patch 8
> > 
> > Konrad
> 
> Hi Konrad,
> 
>   Sure, will add a default value for drive-strength for this pinctrl node.
> 
> Hi Andrew Halaney,
> 
>  I currently don't have a Ride device with me to test this change. Can you
> help test this patch on SA8540-Ride including (drive-strength = <2>;)
> property (which I believe is the default value).
> 
> I can test the same on SA8295-ADP and can push the next version quickly.
> 

The patch here for sa8540p-ride already includes the drive strength. I
did pull this on top of usb-next and it is working well for me in a
quick sanity test. Konrad's pinctrl-names/pinctrl-0 swap is purely
cosmetic of course, but for what is worth that works fine too.

I'd add my Tested-by for this patch, but it seems silly since I authored
the original :)

Also, make CHECK_DTBS=y qcom/sa8540p-ride.dtb is still reporting issues,
but other reviewers have highlighted that I believe. Just for the record
though, make sure you get those silenced!

I look forward to the next revision.

Thanks,
Andrew

> Regards,
> Krishna,
> 
> > >   arch/arm64/boot/dts/qcom/sa8540p-ride.dts | 22 ++++++++++++++++++++++
> > >   1 file changed, 22 insertions(+)
> > > 
> > > diff --git a/arch/arm64/boot/dts/qcom/sa8540p-ride.dts b/arch/arm64/boot/dts/qcom/sa8540p-ride.dts
> > > index 24fa449d48a6..53d47593306e 100644
> > > --- a/arch/arm64/boot/dts/qcom/sa8540p-ride.dts
> > > +++ b/arch/arm64/boot/dts/qcom/sa8540p-ride.dts
> > > @@ -309,6 +309,19 @@ &usb_2_qmpphy0 {
> > >   	status = "okay";
> > >   };
> > > +&usb_2 {
> > > +	pinctrl-names = "default";
> > > +	pinctrl-0 = <&usb2_en_state>;
> > > +
> > > +	status = "okay";
> > > +};
> > > +
> > > +&usb_2_dwc3 {
> > > +	dr_mode = "host";
> > > +	phy-names = "usb2-port0", "usb3-port0";
> > > +	phys = <&usb_2_hsphy0>, <&usb_2_qmpphy0>;
> > > +};
> > > +
> > >   &xo_board_clk {
> > >   	clock-frequency = <38400000>;
> > >   };
> > > @@ -401,4 +414,13 @@ wake-pins {
> > >   			bias-pull-up;
> > >   		};
> > >   	};
> > > +
> > > +	usb2_en_state: usb2-en-state {
> > > +		/* TS3USB221A USB2.0 mux select */
> > > +		pins = "gpio24";
> > > +		function = "gpio";
> > > +		drive-strength = <2>;
> > > +		bias-disable;
> > > +		output-low;
> > > +	};
> > >   };
>