linux-kernel - Re: [PATCH net-next 4/6] net: phy: Add support for inband extensions

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Message-ID: <YoZT/QMLiWVVctKx@lunn.ch>
Date:   Thu, 19 May 2022 16:28:13 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Maxime Chevallier <maxime.chevallier@...tlin.com>
Cc:     davem@...emloft.net, Rob Herring <robh+dt@...nel.org>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, thomas.petazzoni@...tlin.com,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        linux-arm-kernel@...ts.infradead.org,
        Richard Cochran <richardcochran@...il.com>,
        Horatiu.Vultur@...rochip.com, Allan.Nielsen@...rochip.com,
        UNGLinuxDriver@...rochip.com
Subject: Re: [PATCH net-next 4/6] net: phy: Add support for inband extensions

> +static int phy_set_inband_ext(struct phy_device *phydev, u32 mask, u32 ext)
> +{

> +/*
> + * TODO : Doc
> + */
> +enum {
> +	__PHY_INBAND_EXT_PCH = 0,
> +};

I'm not so happy with this API passing masks and values, when you are
actually dealing with a feature which is a boolean, exists, does not
exist.

> +int phy_inband_ext_enable(struct phy_device *phydev, u32 ext);
> +int phy_inband_ext_disable(struct phy_device *phydev, u32 ext);

I would prefer enum phy_inband_ext ext;

phy_inband_ext_set_available(struct phy_device *phydev, enum phy_inband_ext ext);

and add

phy_inband_ext_set_unavailable(struct phy_device *phydev, enum phy_inband_ext ext);

Internally you can then turn these into operations on a u32.

	   Andrew