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Date:   Fri, 29 Jan 2021 18:31:59 +0100
From:   Andrew Lunn <andrew@lunn.ch>
To:     Vadim Pasternak <vadimp@nvidia.com>
Cc:     Jiri Pirko <jiri@resnulli.us>, David Ahern <dsahern@gmail.com>,
        Jakub Kicinski <kuba@kernel.org>,
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        "jacob.e.keller@intel.com" <jacob.e.keller@intel.com>,
        Roopa Prabhu <roopa@nvidia.com>, mlxsw <mlxsw@nvidia.com>
Subject: Re: [patch net-next RFC 00/10] introduce line card support for
 modular switch
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> Platform line card driver is aware of line card I2C topology, its
> responsibility is to detect line card basic hardware type, create I2C
> topology (mux), connect all the necessary I2C devices, like hotswap
> devices, voltage and power regulators devices, iio/a2d devices and line
> card EEPROMs, creates LED instances for LED located on a line card, exposes
> line card related attributes, like CPLD and FPGA versions, reset causes,
> required powered through line card hwmon interface.

So this driver, and the switch driver need to talk to each other, so
the switch driver actually knows what, if anything, is in the slot.

    Andrew