STRUCT W1_THERM_FAMILY_DATA(9)

💅 struct w1_therm_family_data(9) — device data, but make it make sense

okay bestie, welcome to the Kernel API Manual ✨ today's main character is struct w1_therm_family_data, which is literally just a little bundle of device data for the w1_therm world. it's giving ✨scratchpad-core✨ and honestly? we're obsessed 🫶

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🌸 NAME 🌸

struct w1_therm_family_data — device data 💖 (yes that's it, that's the whole vibe)

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✨ SYNOPSIS ✨

here's the actual shape of it, no cap, copy it exactly:

struct w1_therm_family_data {
    uint8_t rom[9];
    atomic_t refcnt;
    int external_powered;
    int resolution;
    int convert_triggered;
    int conv_time_override;
    unsigned int features;
    struct w1_therm_family_converter *specific_functions;
 };

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🎀 Members 🎀

okay so every field gets its own little moment 👑

• rom — the ROM device id 🆔 (that's the 64bit Lasered ROM code plus 1 CRC byte, so nine whole bytes of identity, slay)
• refcnt — the ref count 🔢 literally what it says
• external_powered — power situation check ⚡ 1 = device powered externally, 0 = device parasite powered, -x = error or undefined (😭 so if you see a negative, bestie, something is not okay)
• resolution — the current device resolution 🎚️
• convert_triggered — conversion state of the device 🔥
• conv_time_override — user selected conversion time, or CONV_TIME_DEFAULT ⏱️
• features — bit mask 🌈 — enable temperature validity check, poll for completion
• specific_functions — pointer to struct of device specific function 👉🫶

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🦋 SEE ALSO 🦋

the whole friend group, fr fr 💜 — starting with the kernel file ./drivers/w1/slaves/w1_therm.c:

• struct w1_therm_family_converter(9)
• struct therm_info(9)
• reset_select_slave(9)
• convert_t(9)
• read_scratchpad(9)
• write_scratchpad(9)
• copy_scratchpad(9)
• recall_eeprom(9)
• read_powermode(9)
• trigger_bulk_read(9)
• w1_therm_add_slave(9)
• w1_therm_remove_slave(9)
• w1_DS18B20_convert_temp(9)
• w1_DS18S20_convert_temp(9)
• w1_DS1825_convert_temp(9)
• device_family(9)
• bus_mutex_lock(9)
• check_family_data(9)
• bulk_read_support(9)
• conversion_time(9)
• temperature_from_RAM(9)
• int_to_short(9)
• w1_poll_completion(9)

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ngl this whole page has zero drama and 100% struct energy — but that's kind of iconic in its own way 😌💅

okay that's the whole page, bye bestie 💖✨ this cutie lives in ./drivers/w1/slaves and the manual is dated October 2026, signed off as struct w1_therm_family_data(9) — periodt 🎀👑