STRUCT SCMI_VOLTAGE_INFO(9)

💖 NAME 💖

struct scmi_voltage_info — the lil struct whose whole job is describing one available SCMI Voltage Domain, and honestly? it ate 💅

(this one lives in the Kernel API Manual, if you were wondering 🫶)

✨ SYNOPSIS ✨

       struct scmi_voltage_info {
           unsigned int id;
           bool segmented;
           bool negative_volts_allowed;
           bool async_level_set;
           char name[SCMI_MAX_STR_SIZE];
           unsigned int num_levels;
         #define SCMI_VOLTAGE_SEGMENT_LOW        0;
         #define SCMI_VOLTAGE_SEGMENT_HIGH       1;
         #define SCMI_VOLTAGE_SEGMENT_STEP       2;
           int *levels_uv;
        };

okay bestie, look at her. literally every field is a main character 🌟

🎀 MEMBERS 🎀

• id — the domain ID, exactly as the platform advertised it. no cap, it's just the ID 🪪
• segmented — this one decides how the entries of the levels_uv array are laid out. lowkey the vibe check of the whole struct:
  • when True, the entries are interpreted as triplets, and each triplet defines a segment representing a range of equally space voltages: <lowest_volts>, <highest_volt>, <step_uV> 🔥
  • when False, the entries just represent a single discrete supported voltage level. simple. iconic. periodt ✨
• negative_volts_allowed — True if any of the entries of levels_uv represent a negative voltage 🙈 (yes, voltages can go negative, she's flexible like that)
• async_level_set — True when the voltage domain supports asynchronous level set commands. go off, non-blocking queen 👑
• name — the name the platform assigned to the Voltage Domain 🏷️
• num_levels — the number of total entries in levels_uv. literally just the count, bestie 🧮
• levels_uv — the array of entries describing the available voltage levels for this domain. the moment, the lore, the data 🌈

🔍 SEE ALSO 🔍

kernel file ./include/linux/scmi_protocol.h — and bestie, she comes with an entire friend group 🫶 ngl it's giving family reunion:

• struct scmi_base_info(9)
• struct scmi_clk_proto_ops(9)
• struct scmi_perf_proto_ops(9)
• struct scmi_power_proto_ops(9)
• struct scmi_sensor_reading(9)
• struct scmi_range_attrs(9)
• struct scmi_sensor_axis_info(9)
• struct scmi_sensor_intervals_info(9)
• struct scmi_sensor_info(9)
• struct scmi_sensor_proto_ops(9)
• struct scmi_reset_proto_ops(9)
• struct scmi_voltage_proto_ops(9)
• struct scmi_powercap_info(9)
• struct scmi_powercap_proto_ops(9)
• struct scmi_pinctrl_proto_ops(9)
• struct scmi_notify_ops(9)
• struct scmi_handle(9)
• module_scmi_driver(9)
• module_scmi_protocol(9)

okay that's the whole page, you're officially educated 💜 this came from ./include/linux and it's dated October 2026 — so yeah, timestamped, slay, go read the source bestie 🦋💅