Re: [PATCH v3 2/2] usb: phy: Add USB3 PHY support for Intel LGM SoC

[Ramuthevar, Vadivel MuruganX]

Hi Andy,

Thank you very much for the review comments and your time...

On 12/6/2020 9:18 pm, Andy Shevchenko wrote:
> On Fri, Jun 12, 2020 at 10:59:41AM +0800, Ramuthevar,Vadivel MuruganX wrote:
> > From: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@xxxxxxxxxxxxxxx>
> >
> > Add support for USB PHY on Intel LGM SoC.
>
> Thank you for an update, looks pretty much good, my comments below.
Sure, will update.
> ...
>
> > +static int get_flipped(struct tca_apb *ta, bool *flipped)
> > +{
> > +	union extcon_property_value property;
> > +	int ret;
> > +
> > +	ret = extcon_get_property(ta->phy.edev, EXTCON_USB_HOST,
> > +				  EXTCON_PROP_USB_TYPEC_POLARITY, &property);
> > +	if (ret) {
>
> > +		dev_err(ta->phy.dev, "no polarity property from extcon\n");
>
> (1)
Noted.
> > +		return ret;
> > +	}
> > +
> > +	*flipped = property.intval;
> > +
> > +	return ret;
> > +}
>
> ...
>
> > +	ret = get_flipped(ta, &flipped);
> > +	if (ret)
> > +		dev_err(ta->phy.dev, "no polarity property from extcon\n");
>
> You already has a message in (1). You should decide which one to leave.
>
> But note, if it's a fatal error, you have to return here, otherwise, if you
> decide to leave message here, it should be not on error level.
Agreed!, let double and update as per your suggestion if it is fatal error.
> > +	connected = extcon_get_state(ta->phy.edev, EXTCON_USB_HOST);
> > +	if (connected == ta->connected)
> > +		return;
> > +
> > +	ta->connected = connected;
> > +	if (connected) {
> > +		val = TCPC_VALID | FIELD_PREP(TCPC_MUX_CTL, MUX_USB);
> > +		if (flipped)
> > +			val |= TCPC_FLIPPED;
> > +		dev_info(ta->phy.dev, "connected%s\n", flipped ? " flipped" : "");
> > +	} else {
> > +		val = TCPC_DISCONN;
> > +		dev_info(ta->phy.dev, "disconnected\n");
> > +	}
> > +
> > +	writel(val, ta->phy.io_priv + TCPC_OFFSET);
> > +
>
> > +	if (ta->phy.set_vbus(&ta->phy, connected))
> > +		dev_err(ta->phy.dev, "failed to set VBUS\n");
>
> Please, split it to
> 	ret = ...;
Noted, will update.
> 	if (ret)
>
> > +}
>
> ...
>
> > +static int vbus_notifier(struct notifier_block *nb,
> > +			 unsigned long event, void *ptr)
>
> Consider to put it on one line (you can also shrink the names of unused
> parameters.
Sure, will try to reduce the length of the variable names.

Regards
Vadivel
> > +{
> > +	return NOTIFY_DONE;
> > +}