Re: [PATCH v2 2/4] dt-bindings: add bus number property
From: Alexandre Belloni <alexandre.belloni@bootlin.com>
Date: 2021-10-05 16:31:43
Also in:
linux-devicetree, linux-i2c, lkml
On 05/10/2021 18:22:12+0200, Arnd Bergmann wrote:
On Tue, Oct 5, 2021 at 4:37 PM Paweł Anikiel [off-list ref] wrote:quoted
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 <redacted>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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel