netdev - Re: [patch net-next RFC 00/10] introduce line card support for modular switch

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Date:   Sat, 30 Jan 2021 15:19:52 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Vadim Pasternak <vadimp@...dia.com>,
        David Ahern <dsahern@...il.com>,
        Jakub Kicinski <kuba@...nel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "jacob.e.keller@...el.com" <jacob.e.keller@...el.com>,
        Roopa Prabhu <roopa@...dia.com>, mlxsw <mlxsw@...dia.com>
Subject: Re: [patch net-next RFC 00/10] introduce line card support for
 modular switch

Fri, Jan 29, 2021 at 06:31:59PM CET, andrew@...n.ch wrote:
>> 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.

Not possible in case the BMC is a different host, which is common
scenario.