spmi_bus: spmi@c42d000 compatible = "qcom,spmi-pmic-arb"; reg = <0xc42d000 0x4000>; #address-cells = <1>; #size-cells = <0>;
When laying out an SPMI bus on a PCB:
SPMI uses a 4-bit Slave ID (SID). This limits the bus to 16 devices, keeping the address overhead small and transmission efficient. spmi interface
The interface supports up to 4 master devices (such as application processors) and up to 16 slave devices (such as PMICs or sensors) on a single shared bus. spmi_bus: spmi@c42d000 compatible = "qcom