Re: [RFC PATCH 0/7] i2c: of: reserve unknown and ancillary addresses

From: Geert Uytterhoeven
Date: Fri Feb 21 2020 - 05:15:17 EST

Hi Wolfram,

On Thu, Feb 20, 2020 at 6:26 PM Wolfram Sang
<wsa+renesas@xxxxxxxxxxxxxxxxxxxx> wrote:
> One outcome of my dynamic address assignment RFC series[1] was that we
> need a way to describe an I2C bus in DT fully. This includes unknown
> devices and devices requiring multiple addresses. This series implements
> that.
> Patches 1+2 do some preparational refactoring. After patch 3, we can
> have child nodes with an address, but no compatible. Those addresses
> will be marked busy now. They are handled by the dummy driver as well,
> but named "reserved" instead of dummy. Patches 4+5 are again some
> preparational refactoring. After patch 6, all addresses in a 'reg' array
> are now blocked by the I2C core, also using the dummy driver but named
> "reserved". So, we can have something like this:
> dummy@13 {

Hence should that be "reserved@13"?

> reg = <0x13>, <0x14>;
> };



Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

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