github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-07-31 19:47:08 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

ata: libata: Improve LPM policies description

Browse Source 
Improve the comment describing enum ata_lpm_policy and add comments
within that enum to describe each of the different possible values.
The enum values comments match the description given for the
CONFIG_SATA_MOBILE_LPM_POLICY config parameter.

No functional changes.

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Niklas Cassel <cassel@kernel.org>
This commit is contained in:
Damien Le Moal 2025-06-19 18:35:48 +09:00
parent ed62a62a18
commit 2b89eb177c
1 changed files with 17 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
include/linux/libata.h
View File

@ -499,16 +499,28 @@ enum ata_completion_errors {
};
/*
* Link power management policy: If you alter this, you also need to
* alter libata-sata.c (for the ascii descriptions)
* Link Power Management (LPM) policies.
*
* The default LPM policy to use for a device link is defined using these values
* with the CONFIG_SATA_MOBILE_LPM_POLICY config option and applied through the
* target_lpm_policy field of struct ata_port.
*
* If you alter this, you also need to alter the policy names used with the
* sysfs attribute link_power_management_policy defined in libata-sata.c.
*/
enum ata_lpm_policy {
/* Keep firmware settings */
ATA_LPM_UNKNOWN,
/* No power savings (maximum performance) */
ATA_LPM_MAX_POWER,
/* HIPM (Partial) */
ATA_LPM_MED_POWER,
ATA_LPM_MED_POWER_WITH_DIPM, /* Med power + DIPM as win IRST does */
ATA_LPM_MIN_POWER_WITH_PARTIAL, /* Min Power + partial and slumber */
ATA_LPM_MIN_POWER, /* Min power + no partial (slumber only) */
/* HIPM (Partial) and DIPM (Partial and Slumber) */
ATA_LPM_MED_POWER_WITH_DIPM,
/* HIPM (Partial and DevSleep) and DIPM (Partial and Slumber) */
ATA_LPM_MIN_POWER_WITH_PARTIAL,
/* HIPM (Slumber and DevSleep) and DIPM (Partial and Slumber) */
ATA_LPM_MIN_POWER,
};
enum ata_lpm_hints {