linux-kernel - Re: [PATCH v2 1/2 net-next] net: phy: mscc: add support for CLKOUT ctrl reg for VSC8531 and similar

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Message-ID: <cad1d05d-acdd-454b-a9f8-06262cf8495b@lunn.ch>
Date:   Thu, 13 Jul 2023 22:35:43 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Alexandru Ardelean <alex@...uggie.ro>
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, hkallweit1@...il.com, linux@...linux.org.uk,
        olteanv@...il.com, marius.muresan@....ro
Subject: Re: [PATCH v2 1/2 net-next] net: phy: mscc: add support for CLKOUT
 ctrl reg for VSC8531 and similar

> +set_reg:
> +	mutex_lock(&phydev->lock);
> +	rc = phy_modify_paged(phydev, MSCC_PHY_PAGE_EXTENDED_GPIO,
> +			      VSC8531_CLKOUT_CNTL, mask, set);
> +	mutex_unlock(&phydev->lock);

What is this mutex protecting?

     Andrew