On 29/01/2024 04:38, Chen-Yu Tsai wrote: >>> +allOf: >>> + - $ref: bluetooth-controller.yaml# >>> + >>> +properties: >>> + compatible: >>> + enum: >>> + - mediatek,mt7921s-bluetooth >> >> Can it be also WiFi on separate bus? How many device nodes do you need >> for this device? > > For the "S" variant, WiFi is also on SDIO. For the other two variants, > "U" and "E", WiFi goes over USB and PCIe respectively. On both those > variants, Bluetooth can either go over USB or UART. That is what I > gathered from the pinouts. There are a dozen GPIO pins which don't > have detailed descriptions though. If you want a comprehensive > binding of the whole chip and all its variants, I suggest we ask > MediaTek to provide it instead. My goal with the binding is to document > existing usage and allow me to upstream new device trees. > > For now we only need the Bluetooth node. The WiFi part is perfectly > detectable, and the driver doesn't seem to need the WiFi reset pin. > The Bluetooth driver only uses its reset pin to reset a hung controller. Then suffix "bluetooth" seems redundant. Best regards, Krzysztof
