linux-kernel - Re: [PATCH 7/7] usb: typec: tipd: Fail probe when the controller is in BOOT mode

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Date:   Mon, 4 Apr 2022 17:04:48 +0300
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Sebastian Krzyszkowiak <sebastian.krzyszkowiak@...i.sm>
Cc:     linux-usb@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sven Peter <sven@...npeter.dev>,
        Guido Günther <agx@...xcpu.org>,
        Angus Ainslie <angus@...ea.ca>,
        Hector Martin <marcan@...can.st>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        linux-kernel@...r.kernel.org, kernel@...i.sm
Subject: Re: [PATCH 7/7] usb: typec: tipd: Fail probe when the controller is
 in BOOT mode

On Thu, Mar 17, 2022 at 04:45:18PM +0100, Sebastian Krzyszkowiak wrote:
> BOOT mode means that the device isn't operational because of missing
> firmware, so there's no reason to try to continue in this condition
> (probe will fail in a different place anyway).
> 
> Aside of that, the warning that used to be emited about "dead-battery
> condition" was misleading, as dead-battery condition is a different
> thing that's unrelated to operation mode.
> 
> Therefore, assume that BOOT mode is not a supported mode of operation.
> 
> Signed-off-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak@...i.sm>

Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>

> ---
>  drivers/usb/typec/tipd/core.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
> index d3c70aaf1a0c..c818cc40139d 100644
> --- a/drivers/usb/typec/tipd/core.c
> +++ b/drivers/usb/typec/tipd/core.c
> @@ -729,8 +729,6 @@ static int tps6598x_check_mode(struct tps6598x *tps)
>  	case TPS_MODE_APP:
>  		return 0;
>  	case TPS_MODE_BOOT:
> -		dev_warn(tps->dev, "dead-battery condition\n");
> -		return 0;
>  	case TPS_MODE_BIST:
>  	case TPS_MODE_DISC:
>  	default:
> -- 
> 2.35.1

thanks,

-- 
heikki