From: Andrew Lunn <andrew@lunn.ch>
To: "Marek Behún" <kabel@kernel.org>
Cc: netdev@vger.kernel.org, Russell King <rmk+kernel@armlinux.org.uk>,
Jakub Kicinski <kuba@kernel.org>,
davem@davemloft.net, pali@kernel.org
Subject: Re: [PATCH net-next v4 1/4] net: phy: mdio-i2c: support I2C MDIO protocol for RollBall SFP modules
Date: Tue, 12 Jan 2021 21:20:48 +0100 [thread overview]
Message-ID: <X/4EoCx9vjRBZleO@lunn.ch> (raw)
In-Reply-To: <20210111050044.22002-2-kabel@kernel.org>
> -struct mii_bus *mdio_i2c_alloc(struct device *parent, struct i2c_adapter *i2c)
> +/* RollBall SFPs do not access internal PHY via I2C address 0x56, but
> + * instead via address 0x51, when SFP page is set to 0x03 and password to
> + * 0xffffffff.
> + * Since current SFP code does not modify SFP_PAGE, we set it to 0x03 only at
> + * bus creation time, and expect it to remain set to 0x03 throughout the
> + * lifetime of the module plugged into the system. If the SFP code starts
> + * modifying SFP_PAGE in the future, this code will need to change.
Just an FYI: This is likely to change. NVIDIA are working on
generalizing the API ethtool -m uses. The new API should allow access
to pages and banks. I've already said i will implement the API in the
generic phylink SFP code. But no need to address this now.
Andrew
next prev parent reply other threads:[~2021-01-12 21:47 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-11 5:00 [PATCH net-next v4 0/4] Support for RollBall 10G copper SFP modules Marek Behún
2021-01-11 5:00 ` [PATCH net-next v4 1/4] net: phy: mdio-i2c: support I2C MDIO protocol for RollBall " Marek Behún
2021-01-12 8:42 ` Heiner Kallweit
2021-01-12 14:02 ` Andrew Lunn
2021-01-12 14:40 ` Heiner Kallweit
2021-01-12 17:49 ` Marek Behún
2021-01-12 19:22 ` Russell King - ARM Linux admin
2021-01-18 12:13 ` Pali Rohár
2021-01-18 15:45 ` Russell King - ARM Linux admin
2021-01-12 20:20 ` Andrew Lunn [this message]
2021-01-12 20:43 ` Andrew Lunn
2021-01-12 20:53 ` Marek Behún
2021-01-12 20:55 ` Andrew Lunn
2021-01-12 20:54 ` Andrew Lunn
2021-01-12 21:01 ` Marek Behún
2021-01-13 10:51 ` Pali Rohár
2021-01-12 21:22 ` Russell King - ARM Linux admin
2021-01-13 11:22 ` Pali Rohár
2021-01-13 13:56 ` Andrew Lunn
2021-01-13 13:58 ` Pali Rohár
2021-01-13 16:14 ` Russell King - ARM Linux admin
2021-01-11 5:00 ` [PATCH net-next v4 2/4] net: phylink: allow attaching phy for SFP modules on 802.3z mode Marek Behún
2021-01-13 10:38 ` Pali Rohár
2021-01-11 5:00 ` [PATCH net-next v4 3/4] net: sfp: create/destroy I2C mdiobus before PHY probe/after PHY release Marek Behún
2021-01-13 10:41 ` Pali Rohár
2021-01-11 5:00 ` [PATCH net-next v4 4/4] net: sfp: add support for multigig RollBall transceivers Marek Behún
2021-01-13 10:49 ` Pali Rohár
2021-01-13 11:08 ` Russell King - ARM Linux admin
2021-01-13 11:26 ` Pali Rohár
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