On 22/08/2019 13:36, Rob Herring wrote:
+soundwire@c2d0000 {
+ compatible = "qcom,soundwire-v1.5.0"
+ reg = <0x0c2d0000 0x2000>;
+
+ spkr_left:wsa8810-left{
+ compatible = "sdw0110217201000";
+ ...
+ };
+
+ spkr_right:wsa8810-right{
+ compatible = "sdw0120217201000";
The normal way to distinguish instances is with 'reg'. So I think you
need 'reg' with Instance ID moved there at least. Just guessing, but
perhaps Link ID, too? And for 2 different classes of device is that
enough?
In previous bindings (https://lists.gt.net/linux/kernel/3403276 ) we
did have instance-id as different property, however Pierre had some good
suggestion to make it align with _ADR encoding as per MIPI DisCo spec.
Do you still think that we should split the instance id to reg property?
Assuming you could have more than 1 of the same device on the bus,
then you need some way to distinguish them and the way that's done for
DT is unit-address/reg. And compatible strings should be constant for
each instance.
That is a good point!
Okay that makes more sense keep compatible string constant.
Class ID would be constant for given functionality that the driver will
provide.
So we will end up with some thing like this:
soundwire@c2d0000 {
compatible = "qcom,soundwire-v1.5.0"
reg = <0x0c2d0000 0x2000>;
#address-cells = <1>;
#size-cells = <0>;
spkr_left:skpr@1{
compatible = "sdw10217201000";
reg = <0x1>
sdw-link-id = <0>;
...
};
spkr_right:spkr@2{
compatible = "sdw10217201000";
reg = <0x2>
sdw-link-id = <0>;
};
};
I will spin this in next version!
Thanks,
srini
Rob
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