RE: [EXT] Re: i2c: imx: support slave mode for imx I2C driver
From: Biwen Li
Date: Mon Aug 12 2019 - 00:22:09 EST
> On Fri, Aug 09, 2019 at 03:18:01AM +0000, Biwen Li wrote:
> > > > The patch supports slave mode for imx I2C driver
> > > >
> > > > Signed-off-by: Biwen Li <biwen.li@xxxxxxx>
> > >
> > > Wow, this is much simpler than the other approach flying around:
> > >
> > > http://patchwork.ozlabs.org/patch/1124048/
> > >
> > > Can this one be master and slave on the same bus, too?
> > At the same time, the same bus is in master mode or slave mode.
> So, can someone kindly point out the key differences to me?
The I2C module cannot be a master and a slave simultaneously.
Such as: if the i2c module is used in slave mode with command
'echo slave-24c02 0x64 > /sys/bus/i2c/devices/i2c-0/new_device',
At the mean time, you cannot do master operations(i2cset/i2cget).
You can switch mode from slave to master with command 'echo 0x64
> /sys/bus/i2c/devices/i2c-0/delete_device', then you can do master
Adding Leo to this version too.