diff options
Diffstat (limited to 'Documentation/ABI/testing/sysfs-platform-dptf')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-platform-dptf | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-platform-dptf b/Documentation/ABI/testing/sysfs-platform-dptf index 141834342a4d..53c6b1000320 100644 --- a/Documentation/ABI/testing/sysfs-platform-dptf +++ b/Documentation/ABI/testing/sysfs-platform-dptf @@ -111,3 +111,43 @@ 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. + +What: /sys/bus/platform/devices/INTC1045:00/pch_fivr_switch_frequency/fivr_switching_freq_mhz +Date: September, 2021 +KernelVersion: v5.15 +Contact: linux-acpi@vger.kernel.org +Description: + (RO) Get the FIVR switching control frequency in MHz. + +What: /sys/bus/platform/devices/INTC1045:00/pch_fivr_switch_frequency/fivr_switching_fault_status +Date: September, 2021 +KernelVersion: v5.15 +Contact: linux-acpi@vger.kernel.org +Description: + (RO) Read the FIVR switching frequency control fault status. + +What: /sys/bus/platform/devices/INTC1045:00/pch_fivr_switch_frequency/ssc_clock_info +Date: September, 2021 +KernelVersion: v5.15 +Contact: linux-acpi@vger.kernel.org +Description: + (RO) Presents SSC (spread spectrum clock) information for EMI + (Electro magnetic interference) control. This is a bit mask. + Bits Description + [7:0] Sets clock spectrum spread percentage: + 0x00=0.2% , 0x3F=10% + 1 LSB = 0.1% increase in spread (for + settings 0x01 thru 0x1C) + 1 LSB = 0.2% increase in spread (for + settings 0x1E thru 0x3F) + [8] When set to 1, enables spread + spectrum clock + [9] 0: Triangle mode. FFC frequency + walks around the Fcenter in a linear + fashion + 1: Random walk mode. FFC frequency + changes randomly within the SSC + (Spread spectrum clock) range + [10] 0: No white noise. 1: Add white noise + to spread waveform + [11] When 1, future writes are ignored. |