On Fri, Jun 4, 2021 at 10:54 AM Mario Limonciello
[off-list ref] wrote:

Although first implemented for NVME, this check may be usable by
other drivers as well. Microsoft's specification explicitly mentions
that is may be usable by SATA and AHCI devices.  Google also indicates
that they have used this with SDHCI in a downstream kernel tree that
a user can plug a storage device into.

Link: https://docs.microsoft.com/en-us/windows-hardware/design/component-guidelines/power-management-for-storage-hardware-devices-intro
Suggested-by: Keith Busch <kbusch@kernel.org>
CC: Shyam-sundar S-k <Shyam-sundar.S-k@amd.com>
CC: Alexander Deucher <Alexander.Deucher@amd.com>
CC: Rafael J. Wysocki <redacted>
CC: Prike Liang <redacted>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
---
 drivers/acpi/device_pm.c | 25 +++++++++++++++++++++++++
 drivers/nvme/host/pci.c  | 28 +---------------------------
 include/linux/acpi.h     |  5 +++++
 3 files changed, 31 insertions(+), 27 deletions(-)

Changes from v4->v5:
 * Correct extra "Link:" word in commit message

Acked-by: Raul E Rangel <redacted>