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authorMichael Niewöhner <foss@mniewoehner.de>2020-10-02 17:57:47 +0200
committerMichael Niewöhner <foss@mniewoehner.de>2020-11-13 17:18:08 +0000
commit5df952bc2bcf97f884e9e6fbeabc8d64233590b1 (patch)
tree855416d793cfa21d2e88105d4e4df14f40d506d5 /src/soc/intel/common/block
parent12cfcd90dd328a7cf015d0da69dbdaf0719fa290 (diff)
soc/intel/common: add Kconfig to enable/disable the ACPI PM timer
Currently, the ACPI PM timer state gets set in devicetree by the option PmTimerDisabled. However, it is not board design dependent. Thus, add a user-selectable Kconfig option. Disabling the PM ACPI Timer is only valid when PM Timer emulation is supported and is only possible, when there is a hardware PM Timer (APL does not have one for example). SoCs, where the hardware PM Timer can be disabled must select `PM_ACPI_TIMER_OPTIONAL`. This new Kconfig gets used in the follow-up commits of this series. Change-Id: I7f607f277eb14f84a7370ffb25a13226e7ccc917 Signed-off-by: Michael Niewöhner <foss@mniewoehner.de> Reviewed-on: https://review.coreboot.org/c/coreboot/+/45952 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Nico Huber <nico.h@gmx.de>
Diffstat (limited to 'src/soc/intel/common/block')
-rw-r--r--src/soc/intel/common/block/pmc/Kconfig22
1 files changed, 22 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/pmc/Kconfig b/src/soc/intel/common/block/pmc/Kconfig
index 5cb2bea1d9..b420865c92 100644
--- a/src/soc/intel/common/block/pmc/Kconfig
+++ b/src/soc/intel/common/block/pmc/Kconfig
@@ -43,3 +43,25 @@ config PMC_LOW_POWER_MODE_PROGRAM
help
Enable this for PMC devices to perform registers programming
to ensure low power in active idle scenario.
+
+config PM_ACPI_TIMER_OPTIONAL
+ bool
+ default n
+ help
+ This needs to be selected by SoCs, where the hardware PM Timer
+ can be disabled, to show the ACPI PM Timer Kconfig in menuconfig.
+
+if PM_ACPI_TIMER_OPTIONAL
+
+config USE_PM_ACPI_TIMER
+ bool "Enable ACPI PM timer"
+ default y
+ help
+ This should be disabled for devices running on battery since
+ it can draw much power. Further, it must be disabled, if S0ix
+ is enabled.
+
+ Disabling this option also stops the hardware TCO timer and makes
+ the TCO watchdog unavailable.
+
+endif # PM_ACPI_TIMER_OPTIONAL