linux-kernel - Re: [PATCH] usb: typec: hd3ss3220: Check if regulator needs to be switched

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Message-ID: <aXd7EN9KAmtEHODq@kuha>
Date: Mon, 26 Jan 2026 16:32:48 +0200
From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To: Jan Remmet <j.remmet@...tec.de>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Krishna Kurapati <krishna.kurapati@....qualcomm.com>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	upstream@...ts.phytec.de
Subject: Re: [PATCH] usb: typec: hd3ss3220: Check if regulator needs to be
 switched

Mon, Jan 26, 2026 at 01:06:36PM +0100, Jan Remmet kirjoitti:
> Check regulator state as peripheral and detach can disable vbus.
> Without this check we will try to disable the regulator twice if
> we disconnect host and then connect as device.
> 
> Signed-off-by: Jan Remmet <j.remmet@...tec.de>
> ---
> This is a fixup from
> - Link to v1: https://lore.kernel.org/r/20260115-wip-jremmet-hd3ss3220_vbus-v1-1-b7d9adfbe346@phytec.de
> To
> - Link to v2: https://lore.kernel.org/r/20260123-wip-jremmet-hd3ss3220_vbus-v2-1-bcad313ce92b@phytec.de

I don't understand that, but I think you are fixing a commit in Greg's
tree, right?

If that's the case, then you need the Fixes tag.

thanks,

> ---
>  drivers/usb/typec/hd3ss3220.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/usb/typec/hd3ss3220.c b/drivers/usb/typec/hd3ss3220.c
> index a7c54aa8635f70d6979d98c95f80d4dac277fef2..3e39b800e6b5f4d0cbba957c0dd66c18f781ff38 100644
> --- a/drivers/usb/typec/hd3ss3220.c
> +++ b/drivers/usb/typec/hd3ss3220.c
> @@ -208,6 +208,9 @@ static void hd3ss3220_regulator_control(struct hd3ss3220 *hd3ss3220, bool on)
>  {
>  	int ret;
>  
> +	if (regulator_is_enabled(hd3ss3220->vbus) == on)
> +		return;
> +
>  	if (on)
>  		ret = regulator_enable(hd3ss3220->vbus);
>  	else
> 
> ---
> base-commit: 8acc379b664ec987dcc7eca25a5f5c4a9a4eb9c4
> change-id: 20260126-wip-jremmet-hd3ss3220_vbus_split-946802479e89
> 
> Best regards,
> -- 
> Jan Remmet <j.remmet@...tec.de>

-- 
heikki