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intel: thermal: PCH: Drop ACPI_FADT_LOW_POWER_S0 check

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If ACPI_FADT_LOW_POWER_S0 is not set, this doesn't mean that low-power
S0 idle is not usable.  It merely means that using S3 on the given
system is more beneficial from the energy saving perspective than using
low-power S0 idle, as long as S3 is supported.

Suspend-to-idle is still a valid suspend mode if ACPI_FADT_LOW_POWER_S0
is not set and the pm_suspend_via_firmware() check in pch_wpt_suspend()
is sufficient to distinguish suspend-to-idle from S3, so drop the
confusing ACPI_FADT_LOW_POWER_S0 check.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Zhang Rui <rui.zhang@intel.com>
This commit is contained in:
Rafael J. Wysocki 2022-07-14 21:11:26 +02:00
parent 06d9fb48a8
commit b3ca7aff3c
1 changed files with 0 additions and 8 deletions
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8
drivers/thermal/intel/intel_pch_thermal.c
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@ -207,14 +207,6 @@ static int pch_wpt_suspend(struct pch_thermal_device *ptd)
return 0;
}
/* Do not check temperature if it is not a S0ix capable platform */
#ifdef CONFIG_ACPI
if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0))
return 0;
#else
return 0;
#endif
/* Do not check temperature if it is not s2idle */
if (pm_suspend_via_firmware())
return 0;