On Sun, Nov 08, 2026 at 01:32:18AM +0000, Jonathan Cameron wrote:
> On Thu, 5 Nov 2026 16:42:42 +0100
> Uwe Kleine-König <u.kleine-koenig@baylibre.com> wrote:
> 
> > On Fri, Oct 30, 2026 at 05:47:04PM +0100, Maxime Chevallier wrote:
> > > +#include <linux/i2c.h>
> > > +#include <linux/mod_devicetable.h>  
> > 
> > Please don't include <linux/mod_devicetable.h>. <linux/i2c.h> already
> > provides i2c_device_id and of_device_id. <linux/mod_devicetable.h>
> > provides many more *_device_id and thus introduces a big list of
> > unnecessary dependencies.
> > 
> > I recommend to just drop <linux/mod_devicetable.h> here. If you insist
> > on full iwyu, there is <linux/device-id/i2c.h> and
> > <linux/device-id/of.h>.
> 
> IWYU is always a bit of a 'roughly' case in the kernel.
> There are standards assumed sets of this header will always
> include this other one. I've just started assuming that is
> always the case for these ones. 

Not sure I understand you correctly, but I think it's safe to assume
that including <linux/i2c.h> will always enough to get a definition of
the structs i2c_device_id and of_device_id. My preference is also to not
add includes for <linux/device-id/*.h> in drivers, but opinions differ
and so I typically point out this possibility.

Best regards
Uwe