linux-kernel - Re: [PATCH] phy: phy-twl4030-usb: emit VBUS status events to userspace

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Message-ID: <20160921212439.sjccqx3jg5gpcqaw@atomide.com>
Date:   Wed, 21 Sep 2016 14:24:39 -0700
From:   Tony Lindgren <tony@...mide.com>
To:     Matt Ranostay <mranostay@...il.com>
Cc:     linux-kernel@...r.kernel.org,
        Kishon Vijay Abraham I <kishon@...com>,
        Matt Ranostay <matt@...ostay.consulting>
Subject: Re: [PATCH] phy: phy-twl4030-usb: emit VBUS status events to
 userspace

* Matt Ranostay <mranostay@...il.com> [160920 19:58]:
> Emit KOBJ_ONLINE/KOBJ_OFFLINE action uevent on VBUS status changes.

Makes sense for configuring USB gadgets on demand when connected:

Acked-by: Tony Lindgren <tony@...mide.com>

> 
> Cc: Tony Lindgren <tony@...mide.com>
> Signed-off-by: Matt Ranostay <matt@...ostay.consulting>
> ---
>  drivers/phy/phy-twl4030-usb.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/phy/phy-twl4030-usb.c b/drivers/phy/phy-twl4030-usb.c
> index d9b10a39a2cf..4830392c2fe1 100644
> --- a/drivers/phy/phy-twl4030-usb.c
> +++ b/drivers/phy/phy-twl4030-usb.c
> @@ -316,6 +316,9 @@ static enum musb_vbus_id_status
>  			linkstat = MUSB_VBUS_OFF;
>  	}
>  
> +	kobject_uevent(&twl->dev->kobj, linkstat == MUSB_VBUS_VALID
> +					? KOBJ_ONLINE : KOBJ_OFFLINE);
> +
>  	dev_dbg(twl->dev, "HW_CONDITIONS 0x%02x/%d; link %d\n",
>  			status, status, linkstat);
>  
> -- 
> 2.7.4
>