On Thursday, April 20, 2023 4:58 AM, Andrew Lunn wrote: > On Wed, Apr 19, 2023 at 04:27:33PM +0800, Jiawen Wu wrote: > > Wangxun 10Gb ethernet chip is connected to Designware I2C, to communicate > > with SFP. > > > > Add platform data to pass IOMEM base address, board flag and other > > parameters, since resource address was mapped on ethernet driver. > > > > The exists IP limitations are dealt as workarounds: > > - IP does not support interrupt mode, it works on polling mode. > > - I2C cannot read continuously, only one byte can at a time. > > Are you really sure about that? > > It is a major limitation for SFP devices. It means you cannot access > the diagnostics, since you need to perform an atomic 2 byte read. > > Or maybe i'm understanding you wrong. > > Andrew > Maybe I'm a little confused about this. Every time I read a byte info, I have to write a 'read command'. It can normally get the information for SFP devices. But I'm not sure if this is regular I2C behavior.
