netdev - Re: [PATCH net-next v2 2/6] net: txgbe: Implement I2C bus master driver

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Date:   Sat, 15 Apr 2023 17:11:04 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Jiawen Wu <jiawenwu@...stnetic.com>
Cc:     'Wolfram Sang' <wsa@...nel.org>,
        'Jarkko Nikula' <jarkko.nikula@...ux.intel.com>,
        netdev@...r.kernel.org, linux@...linux.org.uk,
        linux-i2c@...r.kernel.org, linux-gpio@...r.kernel.org,
        mengyuanlou@...-swift.com
Subject: Re: [PATCH net-next v2 2/6] net: txgbe: Implement I2C bus master
 driver

> I don't quite understand how to get the clock rate. I tried to add a software
> node of clock with property ("clock-frequency", 100000) and referenced by
> I2C node. But it didn't work.

I've not spent the time to fully understand the code, so i could be
very wrong....

>From what you said above, you clock is fixed? So maybe you can do
something like:

mfld_get_clk_rate_khz()

https://elixir.bootlin.com/linux/latest/source/drivers/i2c/busses/i2c-designware-pcidrv.c#L97

How are you instantiating the driver? Can you add to
i2_designware_pci_ids[]?

    Andrew