Re: [PATCH 1/5] i3c: master: svc: enable hotjoin default

[Alexandre Belloni]

Hello,

On 17/10/2023 10:51:25-0400, Frank Li wrote:
> On Tue, Oct 17, 2023 at 04:04:57PM +0200, Miquel Raynal wrote:
> > Hi Frank,
> > 
> > Frank.Li@xxxxxxx wrote on Mon, 16 Oct 2023 11:46:28 -0400:
> > 
> > > Hotjoin require clock running and enable SLVSTART irq.
> > > Add module parameter 'hotjoin' to disable hotjoin and enable runtime_pm to
> > > save power.
> > 
> > I am really not a big fan of the use of modules parameters. Maybe it
> > makes sense here. Alex, a better idea?
> 
> Maybe we can create sys entry to enable/disable hotjoin. I think i3c
> should default support hotjoin, but it exist user case that needn't hj and
> want more aggressive power saving.
> 
> If create /sys/ entry, it need change driver/i3c/master.c.
> 

If this can be changed dynamically, I guess ideally, we should be able
to set it independently per controller so it could be disabled on a bus
but kept enabled on others.


-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com