System Power Management Interface

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The System Power Management Interface (SPMI){{cite web|url=https://www.mipi.org/sites/default/files/MIPI_SPM_Interface_Overview_r01.pdf|title=System Power Management Interface Overview}} is a high-speed, low-latency, bi-directional, two-wire serial bus suitable for real-time control of voltage and frequency scaled multi-core application processors and its power management of auxiliary components. SPMI obsoletes a number of legacy, custom point-to-point interfaces and provides a low pin count, high-speed control bus for up to 4 master and 16 slave devices.{{Cite web|url=https://lwn.net/Articles/564637/|title=Add support for the System Power Management Interface (SPMI)}} SPMI is specified by the MIPI Alliance (Mobile Industry Process Interface Alliance).