diff options
| author | Marek Maslanka <mmaslanka@google.com> | 2024-08-12 20:42:00 +0200 |
|---|---|---|
| committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2024-09-06 14:49:20 +0200 |
| commit | e86c8186d03a6ba018e881ed45f0962ad553e861 (patch) | |
| tree | b33ef88863da5938d17834035b43d57cc0d89b0b /drivers/platform/x86/intel/pmc/mtl.c | |
| parent | clocksource: acpi_pm: Add external callback for suspend/resume (diff) | |
| download | linux-e86c8186d03a6ba018e881ed45f0962ad553e861.tar.xz linux-e86c8186d03a6ba018e881ed45f0962ad553e861.zip | |
platform/x86:intel/pmc: Enable the ACPI PM Timer to be turned off when suspended
Allow to disable ACPI PM Timer on suspend and enable on resume. A
disabled timer helps optimise power consumption when the system is
suspended. On resume the timer is only reactivated if it was activated
prior to suspend, so unless the ACPI PM timer is enabled in the BIOS,
this won't change anything.
The ACPI PM timer is used by Intel's iTCO/wdat_wdt watchdog to drive the
watchdog, so it doesn't need to run during suspend.
Signed-off-by: Marek Maslanka <mmaslanka@google.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20240812184208.1080710-1-mmaslanka@google.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Diffstat (limited to 'drivers/platform/x86/intel/pmc/mtl.c')
| -rw-r--r-- | drivers/platform/x86/intel/pmc/mtl.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/platform/x86/intel/pmc/mtl.c b/drivers/platform/x86/intel/pmc/mtl.c index c7d15d864039..91f2fa728f5c 100644 --- a/drivers/platform/x86/intel/pmc/mtl.c +++ b/drivers/platform/x86/intel/pmc/mtl.c @@ -462,6 +462,8 @@ const struct pmc_reg_map mtl_socm_reg_map = { .ppfear_buckets = MTL_SOCM_PPFEAR_NUM_ENTRIES, .pm_cfg_offset = CNP_PMC_PM_CFG_OFFSET, .pm_read_disable_bit = CNP_PMC_READ_DISABLE_BIT, + .acpi_pm_tmr_ctl_offset = SPT_PMC_ACPI_PM_TMR_CTL_OFFSET, + .acpi_pm_tmr_disable_bit = SPT_PMC_BIT_ACPI_PM_TMR_DISABLE, .lpm_num_maps = ADL_LPM_NUM_MAPS, .ltr_ignore_max = MTL_SOCM_NUM_IP_IGN_ALLOWED, .lpm_res_counter_step_x2 = TGL_PMC_LPM_RES_COUNTER_STEP_X2, |