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Apple SoCs have PMGR blocks that control a bunch of power-related features. Besides the existing device power state controls (which are very uniform and handled by apple-pmgr-pwrstate), we also need to manage more random registers such as SoC-wide fabric and memory controller power states, which have a different interface. Add a driver for these kitchen sink controls. Right now it implements fabric and memory controller power state switching on system standby/s2idle, which saves about 1W of power or so on t60xx platforms. Signed-off-by: Hector Martin <marcan@marcan.st> Reviewed-by: Sven Peter <sven@kernel.org> Co-developed-by: Sasha Finkelstein <k@chaosmail.tech> Signed-off-by: Sasha Finkelstein <k@chaosmail.tech> Reviewed-by: Joshua Peisach <jpeisach@ubuntu.com> Link: https://patch.msgid.link/20260705-pmgr-misc-v3-2-51b75fed6f73@chaosmail.tech Signed-off-by: Sven Peter <sven@kernel.org>
58 lines
1.6 KiB
Plaintext
58 lines
1.6 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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if ARCH_APPLE || COMPILE_TEST
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menu "Apple SoC drivers"
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config APPLE_MAILBOX
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tristate "Apple SoC mailboxes"
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depends on PM
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depends on ARCH_APPLE || (64BIT && COMPILE_TEST)
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help
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Apple SoCs have various co-processors required for certain
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peripherals to work (NVMe, display controller, etc.). This
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driver adds support for the mailbox controller used to
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communicate with those.
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Say Y here if you have an Apple SoC.
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config APPLE_PMGR_MISC
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tristate "Apple SoC PMGR miscellaneous support"
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depends on PM
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help
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The PMGR block in Apple SoCs provides high-level power state
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controls for SoC devices. This driver manages miscellaneous
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power controls.
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Say 'y' here if you have a Pro/Max/Ultra Apple SoC.
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config APPLE_RTKIT
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tristate "Apple RTKit co-processor IPC protocol"
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depends on APPLE_MAILBOX
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depends on ARCH_APPLE || COMPILE_TEST
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help
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Apple SoCs such as the M1 come with various co-processors running
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their proprietary RTKit operating system. This option enables support
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for the protocol library used to communicate with those. It is used
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by various client drivers.
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Say 'y' here if you have an Apple SoC.
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config APPLE_SART
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tristate "Apple SART DMA address filter"
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depends on ARCH_APPLE || COMPILE_TEST
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help
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Apple SART is a simple DMA address filter used on Apple SoCs such
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as the M1. It is usually required for the NVMe coprocessor which does
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not use a proper IOMMU.
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Say 'y' here if you have an Apple SoC.
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config APPLE_TUNABLE
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tristate
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depends on ARCH_APPLE || COMPILE_TEST
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endmenu
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endif
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