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| author | Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> | 2020-09-16 01:18:14 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2020-09-18 18:13:56 +0200 |
| commit | 2ce6324eadb014136a4baaf7a174f47d771364a0 (patch) | |
| tree | 7878f0298489bbc3256dc8bbc127edfe6bb1917c /Documentation | |
| parent | Linux 5.9-rc5 (diff) | |
| download | linux-2ce6324eadb014136a4baaf7a174f47d771364a0.tar.xz linux-2ce6324eadb014136a4baaf7a174f47d771364a0.zip | |
ACPI: DPTF: Add PCH FIVR participant driver
This driver adds support for Dynamic Platform and Thermal Framework
(DPTF) PCH (Platform Controller Hub) FIVR (Fully Integrated Voltage
Regulator) participant support.
This participant is responsible for exposing platform telemetry and
control for:
freq_mhz_high_clock
freq_mhz_low_clock
These attributes are used to get and set PCH FIVR switching frequency
for thermal and radio frequency interference mitigation.
Refer to Documentation/ABI/testing/sysfs-platform-dptf for ABI details.
ACPI methods description used in this driver:
RFC0: This ACPI method to set PCH FIVR switching frequency when FIVR
clock is 19.2MHz or 24MHz. The ACPI method takes a DWORD value.
GFC0: This ACPI method to get PCH FIVR switching frequency when FIVR
clock is 19.2MHz or 24MHz.
RFC1: This ACPI method to set PCH FIVR switching frequency when FIVR
clock is 38.4MHz. The ACPI method takes a DWORD value.
GFC1: This ACPI method to get PCH FIVR switching frequency when FIVR
clock is 38.4MHz.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-platform-dptf | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-platform-dptf b/Documentation/ABI/testing/sysfs-platform-dptf index eeed81ca6949..2cbc660d163b 100644 --- a/Documentation/ABI/testing/sysfs-platform-dptf +++ b/Documentation/ABI/testing/sysfs-platform-dptf @@ -92,3 +92,19 @@ Contact: linux-acpi@vger.kernel.org Description: (RO) The battery discharge current capability obtained from battery fuel gauge in milli Amps. + +What: /sys/bus/platform/devices/INTC1045:00/pch_fivr_switch_frequency/freq_mhz_low_clock +Date: November, 2020 +KernelVersion: v5.10 +Contact: linux-acpi@vger.kernel.org +Description: + (RW) The PCH FIVR (Fully Integrated Voltage Regulator) switching frequency in MHz, + when FIVR clock is 19.2MHz or 24MHz. + +What: /sys/bus/platform/devices/INTC1045:00/pch_fivr_switch_frequency/freq_mhz_high_clock +Date: November, 2020 +KernelVersion: v5.10 +Contact: linux-acpi@vger.kernel.org +Description: + (RW) The PCH FIVR (Fully Integrated Voltage Regulator) switching frequency in MHz, + when FIVR clock is 38.4MHz. |