Re: struct i2c_mux_pinctrl_platform_data for the i2c-mux-pinctrl driver

[Stephen Warren]

On 05/22/2017 02:24 AM, Peter Rosin wrote:
> Hi Stephen,
>
> I was looking at the i2c-mux-pinctrl driver and noticed that it has
> code to feed it platform data from C code. There has never been any
> in-kernel users of this interface and I would like to remove it. I
> wonder if you added it way back when just because the i2c-mux-gpio
> driver have such an interface or if, to your knowledge, any external
> platform exists that depends on this?
>
> I.e. I'm talking about removing include/linux/i2c-mux-pinctrl.h and
> the code supporting it in the driver, thus only allowing devicetree
> as source for the platform data.

I'm not aware of any in- or out-of-tree users of that structure/feature.

I added it because at the time I wrote that driver, it was common place 
to support both DT-based and platform-data-based 
instantiation/configuration of devices, so I did the same. If you're 
removing pdata-based configuration, it would make sense to do a blanket 
removal across the entire I2C subsystem (and other subsystems too) I 
suspect, but that's LinusW's call in the end.