On 05/10/2021 18:22:12+0200, Arnd Bergmann wrote: > On Tue, Oct 5, 2021 at 4:37 PM Paweł Anikiel <pan@xxxxxxxxxxxx> wrote: > > > > On SoCFPGA systems, it's desireable to have fixed numbering for > > i2c busses, while being able to enable/disable them (e.g. have i2c1 > > be mapped to /dev/i2c-1, even though i2c0 is disabled). This can also > > be achieved using devicetree aliases (see i2c_add_adapter). However, > > having the driver be self-contained without relying on aliases is more > > robust. > > > > Signed-off-by: Paweł Anikiel <pan@xxxxxxxxxxxx> > > I don't see how adding a nonstandard property in one of the i2c bus > drivers helps at all. How do you expect this to work when there are > multiple i2c controllers in the system using different drivers? What > should happen if both an alias and the busno property are set? > What happens when two nodes have the same busno property because e.g. one is in a dtsi and the other one is in a dts? -- Alexandre Belloni, co-owner and COO, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
