[lkml]   [2018]   [Jul]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v6 00/10] Add the I3C subsystem
Hi Arnd,

On Tue, Jul 24, 2018 at 5:40 PM Arnd Bergmann <> wrote:
> On Tue, Jul 24, 2018 at 5:15 PM, Geert Uytterhoeven
> <> wrote:
> > On Tue, Jul 24, 2018 at 5:05 PM Arnd Bergmann <> wrote:
> >> That's not the case I was describing here, I was thinking of what
> >> Wolfram described with the Renesas SoC that has two i2c masters
> >> multiplexed through the pinmux layer. I would assume that we
> >> can still do the same thing in i3c by shutting down the current
> >> master without a handover, and reprobing everything from scratch.
> >
> > The major disadvantage of reprobing is that it may cause visual disturbances
> > when i2c slaves are involved with e.g. the display pipeline (think HDMI encoders
> > etc.).
> Do you mean we should reuse the device pointer and association with
> the driver even when we switch out the i3c master using the pinmux?
> Or do you mean we need to be prepared for driving a single
> slave through multiple masters over the lifetime of that device,
> but using the i3c master handover protocol?
> In the second case, how do we decide which master to use
> for accessing a device for a given request?

I'll have to defer to Wolfram. He's the i2c and muxing expert.



Geert Uytterhoeven -- There's lots of Linux beyond ia32 --

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds

 \ /
  Last update: 2018-07-24 17:47    [W:0.083 / U:2.492 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site