linux-kernel - Re: [PATCH 05/13] usb: dwc3: meson-g12a: refactor usb2 phy init

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Date:   Tue, 24 Mar 2020 15:35:58 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     kishon@...com, balbi@...nel.org, khilman@...libre.com,
        linux-amlogic@...ts.infradead.org, linux-usb@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 05/13] usb: dwc3: meson-g12a: refactor usb2 phy init

On 24/03/2020 15:33, Martin Blumenstingl wrote:
> Hi Neil,
> 
> On Tue, Mar 24, 2020 at 11:20 AM Neil Armstrong <narmstrong@...libre.com> wrote:
> [...]
>> @@ -195,23 +239,9 @@ static int dwc3_meson_g12a_usb2_init(struct dwc3_meson_g12a *priv)
>>                 if (!strstr(priv->drvdata->phy_names[i], "usb2"))
>>                         continue;
>>
>> -               regmap_update_bits(priv->u2p_regmap[i], U2P_R0,
>> -                                  U2P_R0_POWER_ON_RESET,
>> -                                  U2P_R0_POWER_ON_RESET);
>> -
>> -               if (priv->drvdata->otg_switch_supported && i == USB2_OTG_PHY) {
>> -                       regmap_update_bits(priv->u2p_regmap[i], U2P_R0,
>> -                               U2P_R0_ID_PULLUP | U2P_R0_DRV_VBUS,
>> -                               U2P_R0_ID_PULLUP | U2P_R0_DRV_VBUS);
>> -
>> -                       dwc3_meson_g12a_usb2_set_mode(priv, i,
>> -                                                     priv->otg_phy_mode);
>> -               } else
>> -                       dwc3_meson_g12a_usb2_set_mode(priv, i,
>> -                                                     PHY_MODE_USB_HOST);
>> -
>> -               regmap_update_bits(priv->u2p_regmap[i], U2P_R0,
>> -                                  U2P_R0_POWER_ON_RESET, 0);
>> +               ret = priv->drvdata->usb2_init_phy(priv, i, mode);
>> +               if (ret)
>> +                       return ret;
>>         }
> this doesn't compile for me, it complains that mode is undefined
> I believe we need something like the attached patch on top.

I'll investigate

> 
> [...]
>> @@ -580,7 +612,9 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev)
>>         /* Get dr_mode */
>>         priv->otg_mode = usb_get_dr_mode(dev);
>>
>> -       dwc3_meson_g12a_usb_init(priv);
>> +       ret = dwc3_meson_g12a_usb_init(priv);
>> +       if (ret)
>> +               goto err_disable_clks;
> this looks like an unrelated fix, dwc3_meson_g12a_usb_init has always
> returned int (as potential error)
> also the same check is missing in dwc3_meson_g12a_resume
> can you please move this to a separate patch with the appropriate tag:
> Fixes: c99993376f72ca ("usb: dwc3: Add Amlogic G12A DWC3 glue")

Ok

Thanks,
Neil

> 
> 
> Martin
>