Re: [PATCH 1/8] rust: kernel: Add Platform device and driver abstractions

[Danilo Krummrich]

On Wed, Sep 11, 2024 at 04:56:14PM +0200, Greg Kroah-Hartman wrote:
> On Wed, Sep 11, 2024 at 07:57:18PM +0530, Ayush Singh wrote:
> > +/// An identifier for Platform devices.
> > +///
> > +/// Represents the kernel's [`struct of_device_id`]. This is used to find an appropriate
> > +/// Platform driver.
> > +///
> > +/// [`struct of_device_id`]: srctree/include/linux/mod_devicetable.h
> > +pub struct DeviceId(&'static CStr);
> > +
> > +impl DeviceId {
> 
> <snip>
> 
> I appreciate posting this, but this really should go on top of the
> device driver work Danilo Krummrich has been doing.

If everyone agrees, I'd offer to just provide platform device / driver
abstractions with my next patch series. This way you don't need to worry
about aligning things with the rest of the abstractions yourself and throughout
potential further versions of the series.

Just be aware that I probably won't get to work on it until after LPC.

> He and I spent a
> lot of time working through this this past weekend (well, him talking
> and explaining, and me asking too many stupid questions...)
> 
> I think what he has will make the platform driver/device work simpler
> here, and I'll be glad to take it based on that, this "independent" code
> that doesn't interact with that isn't the best idea overall.
> 
> It also will properly handle the "Driver" interaction as well, which we
> need to get right, not a one-off like this for a platform driver.
> Hopefully that will not cause much, if any, changes for your use of this
> in your driver, but let's see.
> 
> thanks,
> 
> greg k-h
>