netdev - Re: [RFC PATCH net-next 3/9] net: phy: Add phy

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Date:   Wed, 22 May 2019 19:05:04 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Ioana Ciornei <ioana.ciornei@....com>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        "andrew@...n.ch" <andrew@...n.ch>,
        "hkallweit1@...il.com" <hkallweit1@...il.com>,
        "maxime.chevallier@...tlin.com" <maxime.chevallier@...tlin.com>,
        "olteanv@...il.com" <olteanv@...il.com>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>
Subject: Re: [RFC PATCH net-next 3/9] net: phy: Add phy_standalone sysfs entry



On 5/22/2019 6:20 PM, Ioana Ciornei wrote:
> Export a phy_standalone device attribute that is meant to give the
> indication that this PHY lacks an attached_dev and its corresponding
> sysfs link.
> 
> Signed-off-by: Ioana Ciornei <ioana.ciornei@....com>

I would rather have that attribute be conditionally visible/created upon
a PHY device being associated with a NULL net_device and not have it for
"non-standalone" PHY devices, that would be confusing.

> ---
>  drivers/net/phy/phy_device.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
> index 25cc7c33f8dd..30e0e73d5f86 100644
> --- a/drivers/net/phy/phy_device.c
> +++ b/drivers/net/phy/phy_device.c
> @@ -537,10 +537,22 @@ phy_has_fixups_show(struct device *dev, struct device_attribute *attr,
>  }
>  static DEVICE_ATTR_RO(phy_has_fixups);
>  
> +static ssize_t phy_standalone_show(struct device *dev,
> +				   struct device_attribute *attr,
> +				   char *buf)
> +{
> +	struct phy_device *phydev = to_phy_device(dev);
> +
> +	return sprintf(buf, "%d\n", !phydev->attached_dev);
> +}
> +
> +static DEVICE_ATTR_RO(phy_standalone);
> +
>  static struct attribute *phy_dev_attrs[] = {
>  	&dev_attr_phy_id.attr,
>  	&dev_attr_phy_interface.attr,
>  	&dev_attr_phy_has_fixups.attr,
> +	&dev_attr_phy_standalone.attr,
>  	NULL,
>  };
>  ATTRIBUTE_GROUPS(phy_dev);
> 

-- 
Florian