linux-kernel - Re: [PATCH v5 2/2] usb: typec: hd3ss3220: Enable VBUS based on ID pin state

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Message-ID: <aP9ynU8tDho5PBAx@kuha.fi.intel.com>
Date: Mon, 27 Oct 2025 15:24:45 +0200
From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: Krishna Kurapati <krishna.kurapati@....qualcomm.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Biju Das <biju.das.jz@...renesas.com>, linux-usb@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 2/2] usb: typec: hd3ss3220: Enable VBUS based on ID
 pin state

On Mon, Oct 27, 2025 at 03:19:04PM +0200, Dmitry Baryshkov wrote:
> On Mon, Oct 27, 2025 at 11:47:13AM +0200, Heikki Krogerus wrote:
> > Hi Krishna,
> > 
> > > +static int hd3ss3220_get_vbus_supply(struct hd3ss3220 *hd3ss3220)
> > > +{
> > > +	struct device_node *hd3ss3220_node = hd3ss3220->dev->of_node;
> > > +	struct device_node *np;
> > > +
> > > +	np = of_graph_get_remote_node(hd3ss3220_node, 0, 0);
> > > +	if (!np) {
> > > +		dev_err(hd3ss3220->dev, "failed to get device node");
> > > +		return -ENODEV;
> > > +	}
> > 
> > So I guess that's the connector node. Why can't you just place the
> > regulator reference to the hd3ss3220 controller node instead of the
> > connector like the port controllers do?
> > 
> > That would allow us to do a simple devm_regulator_get_optional() call
> > that's not tied to DT only.
> 
> But we have devm_of_regulator_get_optional(), it was mentioned in the
> previous email if I'm not mistaken. If we need, we should add
> devm_fwnode_regulator_get(_optional).
> 
> vbus supply is described as a part of the usb-c-connector schema, so
> it is not that logical to describe it as a part of the Type-C
> controller.

Okay, got it. This is OK by me then.

Thanks Dmitry,

-- 
heikki