linux-kernel - Re: [PATCH v4 3/3] ARM: dts: aspeed: ast2600-evb: Enable virtual hub

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Message-ID: <CACPK8Xev-AYtrWzZyMGj8eBkTP2YXjnX=M+4UUGgfRZYeGMPtA@mail.gmail.com>
Date:   Thu, 19 May 2022 13:15:41 +0000
From:   Joel Stanley <joel@....id.au>
To:     Howard Chiu <howard_chiu@...eedtech.com>
Cc:     Andrew Jeffery <andrew@...id.au>, Rob Herring <robh+dt@...nel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-aspeed@...ts.ozlabs.org" <linux-aspeed@...ts.ozlabs.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Troy Lee <troy_lee@...eedtech.com>
Subject: Re: [PATCH v4 3/3] ARM: dts: aspeed: ast2600-evb: Enable virtual hub

On Tue, 29 Mar 2022 at 03:24, Howard Chiu <howard_chiu@...eedtech.com> wrote:
>
> Enable Aspeed VHub for HID emulation
>
> Signed-off-by: Howard Chiu <howard_chiu@...eedtech.com>
> ---
>  arch/arm/boot/dts/aspeed-ast2600-evb.dts | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/arch/arm/boot/dts/aspeed-ast2600-evb.dts b/arch/arm/boot/dts/aspeed-ast2600-evb.dts
> index 158b88f38d2c..b98cdad86e90 100644
> --- a/arch/arm/boot/dts/aspeed-ast2600-evb.dts
> +++ b/arch/arm/boot/dts/aspeed-ast2600-evb.dts
> @@ -314,6 +314,11 @@ &sdhci1 {
>         clk-phase-sd-hs = <7>, <200>;
>  };
>
> +&vhub {
> +       status = "okay";
> +       pinctrl-names = "default";
> +};

When booting with this patch applied we see:

[    1.596377] aspeed-g6-pinctrl 1e6e2000.syscon:pinctrl: pin A4
already requested by 1e6a1000.usb; cannot claim for 1e6a0000.usb-vhub
[    1.596678] aspeed-g6-pinctrl 1e6e2000.syscon:pinctrl: pin-252
(1e6a0000.usb-vhub) status -22
[    1.596947] aspeed-g6-pinctrl 1e6e2000.syscon:pinctrl: could not
request pin 252 (A4) from group USBA  on device aspeed-g6-pinctrl
[    1.597238] aspeed_vhub 1e6a0000.usb-vhub: Error applying setting,
reverse things back


> +
>  &video {
>         status = "okay";
>         memory-region = <&video_engine_memory>;
> --
> 2.25.1
>