Linux Driver To Expose Voltage Inputs For Raspberry Pi SBCs
A new Linux driver is being developed to expose voltage inputs for Raspberry Pi single board computers. This driver, named 'RASPBERRYPI-HWMON', will allow users to access various voltage measurements through the Linux user-space. The changes are expected to be included in the upcoming Linux 7.2 merge window.
- ▪The Raspberry Pi hardware monitoring driver is being extended to expose voltage measurements.
- ▪The driver will provide access to core and SDRAM voltage measurements in millivolts.
- ▪These changes are set to be submitted for the Linux 7.2 merge window in mid-June.
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Linux Driver To Expose Voltage Inputs For Raspberry Pi SBCs Written by Michael Larabel in Raspberry Pi on 27 May 2026 at 06:15 AM EDT. Add A Comment The Raspberry Pi hardware monitoring driver "RASPBERRYPI-HWMON" is being extended to allow exposing voltage measurements on these ARM single board computers. The Raspberry Pi firmware provides a number of voltage measurements for the core and multiple SDRAM voltages. With a patch queued into hwmon-next, those voltage measurements are being propagated to the Linux user-space via the conventional HWMON sysfs interfaces. This includes in0_input for the core voltage, in1_input as the SDRAM controller voltage, in2_input as the SDRAM I/O voltage, and in3_input as the SDRAM PHY voltage. All measurements are in millivolts.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Phoronix.