From: Andrew Lunn <andrew@lunn.ch>
To: Heiner Kallweit <hkallweit1@gmail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>,
Russell King - ARM Linux <linux@armlinux.org.uk>,
David Miller <davem@davemloft.net>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>
Subject: Re: [PATCH net-next 1/3] net: phy: add and use phy_check_downshift
Date: Thu, 19 Mar 2020 10:10:45 +0100 [thread overview]
Message-ID: <20200319091045.GC20761@lunn.ch> (raw)
In-Reply-To: <d2822357-4c1e-a072-632e-a902b04eba7c@gmail.com>
On Wed, Mar 18, 2020 at 10:29:01PM +0100, Heiner Kallweit wrote:
> So far PHY drivers have to check whether a downshift occurred to be
> able to notify the user. To make life of drivers authors a little bit
> easier move the downshift notification to phylib. phy_check_downshift()
> compares the highest mutually advertised speed with the actual value
> of phydev->speed (typically read by the PHY driver from a
> vendor-specific register) to detect a downshift.
>
> +/**
> + * phy_check_downshift - check whether downshift occurred
> + * @phydev: The phy_device struct
> + *
> + * Check whether a downshift to a lower speed occurred. If this should be the
> + * case warn the user.
> + */
Hi Heiner
Might be worth documenting here that phydev->speed needs to contain
the real speed, which typically requires a vendor-specific register.
Andrew
next prev parent reply other threads:[~2020-03-19 9:10 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-18 21:27 [PATCH net-next 0/3] net: phy: add and use phy_check_downshift Heiner Kallweit
2020-03-18 21:29 ` [PATCH net-next 1/3] " Heiner Kallweit
2020-03-18 23:21 ` Russell King - ARM Linux admin
2020-03-19 7:30 ` Heiner Kallweit
2020-03-19 11:25 ` Russell King - ARM Linux admin
2020-03-19 13:04 ` Andrew Lunn
2020-03-19 13:58 ` Russell King - ARM Linux admin
2020-03-19 16:36 ` Heiner Kallweit
2020-03-19 16:55 ` Florian Fainelli
2020-03-19 17:04 ` Heiner Kallweit
2020-03-19 17:08 ` Russell King - ARM Linux admin
2020-03-20 8:07 ` Heiner Kallweit
2020-03-19 9:06 ` Andrew Lunn
2020-03-19 9:10 ` Andrew Lunn [this message]
2020-03-18 21:29 ` [PATCH net-next 2/3] net: phy: marvell: remove downshift warning now that phylib takes care Heiner Kallweit
2020-03-18 21:31 ` [PATCH net-next 3/3] net: phy: aquantia: " Heiner Kallweit
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