STRUCT XOADC_CHANNEL(9)

🌸 struct xoadc_channel(9) 🌸

okay so bestie, welcome to the Kernel API Manual section for struct xoadc_channel(9) — the manual name is literally in the title, we're already iconic ✨

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💖 NAME 💖

struct xoadc_channel — it encodes channel properties and defaults, that's the whole job, and it does it slayfully 💅

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✨ SYNOPSIS ✨

struct xoadc_channel {
    const char *datasheet_name;
    u8 pre_scale_mux:2;
    u8 amux_channel:4;
    const struct u32_fract prescale;
    enum iio_chan_type type;
    enum vadc_scale_fn_type scale_fn_type;
    u8 amux_ip_rsv:3;
 };

like, look at those bitfields. little guys. tiny little bit-widths. 🎀

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🦋 Members 🦋

• datasheet_name — this is the hardwarename of the channel. yes, "hardwarename," one word, that's how it's living. it's the name. of the hardware. 🫶
• pre_scale_mux — the prescale (PM8058) or premux (PM8921) used for selecting this channel. and listen: both this and the amux channel are needed to uniquely identify a channel, so it's giving teamwork, it's giving duo. values are 0..3. ⭐
• amux_channel — the value of the ADC_ARB_USRP_AMUX_CNTRL register for this channel, bits 4..7, and it selects the amux. values are 0..f. lowkey gorgeous 🔥
• prescale — the channels have hard-coded prescale ratios defined by the hardware itself (not vibes, actual hardware), and this field just tells us what that ratio is 🧚
• type — the corresponding IIO channel type. usually IIO_VOLTAGE or IIO_TEMP, iykyk 💜
• scale_fn_type — the liner interpolation etc. that converts the ADC code into the value IIO expects — so that's in uV or millicelsius etc. and ngl this scale function can be pretty elaborate if different thermistors are connected or if other hardware characteristics are deployed. it's a whole personality 😭
• amux_ip_rsv — the ratiometric scale value used by the analog muxer, and this one selects the reference voltage for ratiometric scaling. main character energy for real 👑

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lowkey reminder bestie: the bit-widths above (:2, :4, :3) are exactly as declared — don't go changing them, they're not decorative 🩷

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/iio/adc/qcom-pm8xxx-xoadc.c
• struct xoadc_variant(9)
• struct pm8xxx_chan_info(9)
• struct pm8xxx_xoadc(9)

go read the friends, they're all in the same friend group fr fr 💀💖

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and that's the page!! coming at you from ./drivers/iio/adc, dated October 2026, signed off as struct xoadc_channel(9) — mwah, drink water, read your headers, periodt 🎀✨🌸