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Arm platforms implement PSCI standards (mandated by BSA spec) and rather than introducing the sleep control and status register could make use of the PSCI standard for putting CPU and platform to suspend state.
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PSCI_CPU_SUSPEND API has a power_state parameter and some of the bits are vendor-specific and this is typically defined in the DT. How do we derive this for ACPI?
Linux commands to test ACPI suspend states
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