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

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Message-ID: <024001d970ce$62482750$26d875f0$@trustnetic.com>
Date:   Mon, 17 Apr 2023 09:46:09 +0800
From:   Jiawen Wu <jiawenwu@...stnetic.com>
To:     "'Andrew Lunn'" <andrew@...n.ch>
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

On Saturday, April 15, 2023 11:11 PM, Andrew Lunn wrote:
> > 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
> 

There is no PCI ID for our I2C device, so I register the platform I2C device.