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Date:   Thu, 29 Apr 2021 23:26:06 +0200
From:   Andrew Lunn <andrew@lunn.ch>
To:     DENG Qingfang <dqfext@gmail.com>
Cc:     "David S. Miller" <davem@davemloft.net>,
        Florian Fainelli <f.fainelli@gmail.com>,
        Heiner Kallweit <hkallweit1@gmail.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Landen Chao <Landen.Chao@mediatek.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Russell King <linux@armlinux.org.uk>,
        Sean Wang <sean.wang@mediatek.com>,
        Vivien Didelot <vivien.didelot@gmail.com>,
        Vladimir Oltean <olteanv@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        Linus Walleij <linus.walleij@linaro.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Sergio Paracuellos <sergio.paracuellos@gmail.com>,
        linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org,
        linux-staging@lists.linux.dev, devicetree@vger.kernel.org,
        netdev@vger.kernel.org, Weijie Gao <weijie.gao@mediatek.com>,
        Chuanhong Guo <gch981213@gmail.com>,
        =?iso-8859-1?Q?Ren=E9?= van Dorst <opensource@vdorst.com>,
        Frank Wunderlich <frank-w@public-files.de>,
        Thomas Gleixner <tglx@linutronix.de>,
        Marc Zyngier <maz@kernel.org>
Subject: Re: [PATCH net-next 1/4] net: phy: add MediaTek PHY driver
Message-ID: <YIskbqKwhZA3n1Av@lunn.ch>
References: <20210429062130.29403-1-dqfext@gmail.com>
 <20210429062130.29403-2-dqfext@gmail.com>
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On Thu, Apr 29, 2021 at 02:21:27PM +0800, DENG Qingfang wrote:
> Add support for MediaTek PHYs found in MT7530 and MT7531 switches.
> The initialization procedure is from the vendor driver, but due to lack
> of documentation, the function of some register values remains unknown.
> 
> Signed-off-by: DENG Qingfang <dqfext@gmail.com>

Reviewed-by: Andrew Lunn <andrew@lunn.ch>

> +
> +	/* Enable HW auto downshift */
> +	phy_modify_paged(phydev, MTK_PHY_PAGE_EXTENDED, 0x14, 0, BIT(4));

As a follow up patch, you could add support for controlling this via a
PHY tunable.

    Andrew