netdev - Re: Query on acpi support for dsa driver

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Date: Fri, 14 Jul 2023 17:47:42 -0700
From: SIMON BABY <simonkbaby@...il.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: netdev@...r.kernel.org
Subject: Re: Query on acpi support for dsa driver

Thank you Andrew for your inputs . 
Do I need ACPI tables ( similar to DT ) and changes in the device driver code for invoking the correct probe function ?

Regards
Simon

Sent from my iPhone

> On Jul 14, 2023, at 4:01 PM, Andrew Lunn <andrew@...n.ch> wrote:
> 
> On Fri, Jul 14, 2023 at 12:38:24PM -0700, SIMON BABY wrote:
>> Hello Team ,
> 
>> I am new to this group . I have a query on adding a switch device (
>> microchip EVB-KSZ9897) to my Intel based x86 board which uses ACPI
>> instead of device tree. The Intel x86 is running Linux Ubuntu 5.15
>> kernel .
> 
>> Do I need any changes in the drive code to get the acpi table and
>> invoke the functions ? When I looked the code
>> drivers/net/dsa/microchip/ksz9477_i2c.c it has support only for DSA.
> 
>> Please provide your inputs .
> 
> ACPI is generally not used for networking. Nobody who cares enough
> about ACPI has taken the time to understand the DT concepts, find the
> equivalent in ACPI, write a proposal to extend the ACPI standard, get
> it accepted in, and then done the implementation work.
> 
> What some people have tried in the past is just accept DT is the way
> describe this sort of hardware, and stuff all the DT properties into
> ACPI tables. But they often do it wrongly, including all the DT
> legacy, deprecated properties etc.
> 
> The mv88e6xxx driver can be instantiated via a platform driver. I have
> a couple of x86 targets with drivers placed in drivers/platform/x86
> which instantiate mv88e6xxx instances. For simple setups, using just
> the internal PHYs that is sufficient.
> 
> Take a look at drivers/platform/x86/asus-tf103c-dock.c and how it uses
> i2c_new_client_device() to instantiate i2c devices. And
> mv88e6xxx_probe() and its use of pdata.
> 
>    Andrew