drivers: firmware: psci: add extended stateid power_state support

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PSCI v1.0 augmented the power_state parameter format specification
(extended stateid) and introduced a way to probe it through the
PSCI_FEATURES interface.

This patch implements code that detects the power_state format at
run-time through the PSCI_FEATURES interface, so that the power_state
argument can be properly detected and validated in the kernel according
to the information provided through firmware.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Jisheng Zhang <jszhang@marvell.com>
Cc: Mark Rutland <mark.rutland@arm.com>

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Lorenzo Pieralisi 2015-05-26 17:10:32 +01:00

parent 5f004e0c9f

commit a5c00bb28d

2 changed files with 44 additions and 2 deletions

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include/uapi/linux/psci.h

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