STRUCT QUICKI2C_SUBIP_ACPI_CONFIG(9)

💖 struct quicki2c_subip_acpi_config 💖

okay so this is a page from the Kernel API Manual, and it's all about struct quicki2c_subip_acpi_config — the QuickI2C ACPI DSD parameters ✨ bestie, it's literally the vibe-check sheet for I2C timing.

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🌸 NAME 🌸

struct quicki2c_subip_acpi_config — QuickI2C ACPI DSD parameters 🎀

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🦋 SYNOPSIS 🦋

struct quicki2c_subip_acpi_config {
    u64 SMHX;
    u64 SMLX;
    u64 SMTD;
    u64 SMRD;
    u64 FMHX;
    u64 FMLX;
    u64 FMTD;
    u64 FMRD;
    u64 FMSL;
    u64 FPHX;
    u64 FPLX;
    u64 FPTD;
    u64 FPRD;
    u64 HMHX;
    u64 HMLX;
    u64 HMTD;
    u64 HMRD;
    u64 HMSL;
    u64 FSEN;
    u64 FSVL;
    u64 INDE;
    u64 INDV;
    u8 reserved;
 };

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💅 Members 💅

like, every single one of these is a u64 except the last one, and every one of them matters. no skipping. 🫶

• SMHX — Standard Mode (100 kbit/s) Serial Clock Line HIGH Period ⏰
• SMLX — Standard Mode (100 kbit/s) Serial Clock Line LOW Period
• SMTD — Standard Mode (100 kbit/s) Serial Data Line Transmit Hold Period
• SMRD — Standard Mode (100 kbit/s) Serial Data Receive Hold Period
• FMHX — Fast Mode (400 kbit/s) Serial Clock Line HIGH Period
• FMLX — Fast Mode (400 kbit/s) Serial Clock Line LOW Period
• FMTD — Fast Mode (400 kbit/s) Serial Data Line Transmit Hold Period
• FMRD — Fast Mode (400 kbit/s) Serial Data Line Receive Hold Period
• FMSL — Maximum length (in ic_clk_cycles) of suppressed spikes in Standard Mode, Fast Mode and Fast Mode Plus 🦔
• FPHX — Fast Mode Plus (1Mbit/sec) Serial Clock Line HIGH Period 🔥
• FPLX — Fast Mode Plus (1Mbit/sec) Serial Clock Line LOW Period
• FPTD — Fast Mode Plus (1Mbit/sec) Serial Data Line Transmit HOLD Period
• FPRD — Fast Mode Plus (1Mbit/sec) Serial Data Line Receive HOLD Period
• HMHX — High Speed Mode Plus (3.4Mbits/sec) Serial Clock Line HIGH Period ⚡
• HMLX — High Speed Mode Plus (3.4Mbits/sec) Serial Clock Line LOW Period
• HMTD — High Speed Mode Plus (3.4Mbits/sec) Serial Data Line Transmit HOLD Period
• HMRD — High Speed Mode Plus (3.4Mbits/sec) Serial Data Line Receive HOLD Period
• HMSL — Maximum length (in ic_clk_cycles) of suppressed spikes in High Speed Mode 🦔
• FSEN — Maximum Frame Size Feature Enable Control
• FSVL — Maximum Frame Size Value (unit in Bytes)
• INDE — Interrupt Delay Feature Enable Control
• INDV — Interrupt Delay Value (unit in 10 us) ⏱️
• reserved — a u8, just sitting there being reserved. iconic of it honestly. 🙈

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✨ Description ✨

So basically: those properties get from QUICKI2C_ACPI_METHOD_NAME_ISUB method, and they're used for I2C timing configure. that's the whole thing, and it's lowkey important — this is where your timings come from, no cap. 💜

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👑 SEE ALSO 👑

• Kernel file ./drivers/hid/intel-thc-hid/intel-quicki2c/quicki2c-dev.h
• struct quicki2c_subip_acpi_parameter(9)
• struct quicki2c_ddata(9)
• struct quicki2c_device(9)

go read those next, bestie, iykyk 🧚

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fr fr that's the whole page — nothing skipped, nothing invented, every flag and number exactly where it belongs. slay. 💀

and that's a wrap! 🌈 this one came from ./drivers/hid/intel-thc-hid/in... and it's dated October 2026 — mwah, periodt. 🍓🎀