STRUCT ST_DWC3(9)

💖 NAME 💖

struct st_dwc3 — the private structure for the dwc3-st driver, bestie. like, the little home where this driver keeps all its stuff 🏠✨

(also hi, this is a page from the Kernel API Manual — yes, that manual, we're fancy now 💅)

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✨ SYNOPSIS ✨

okay so here's the whole vibe, literally the exact struct, no cap:

struct st_dwc3 {
    struct device *dev;
    void __iomem *glue_base;
    struct regmap *regmap;
    int syscfg_reg_off;
    enum usb_dr_mode dr_mode;
    struct reset_control *rstc_pwrdn;
    struct reset_control *rstc_rst;
 };

look at her. she's iconic. seven members, zero notes 👑

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🌸 Members 🌸

okay time for the member-by-member tour, grab a snack 🍓

• dev — the device pointer. the main character of the whole structure honestly, it's giving anchor-of-the-universe energy ✨
• glue_base — ioaddr for the glue registers 🧚 like, that's the address you need to poke at the glue-y bits
• regmap — the regmap pointer, and what's it for? getting syscfg. that's the whole assignment, and it ate 💅
• syscfg_reg_off — the usb syscfg control offset. it's an offset. for the usb syscfg control. it does exactly what it says on the label 🎀
• dr_mode — the drd static host/device config 🦋 static being the key word here, she's not out here changing her mind
• rstc_pwrdn — this one's literally labeled "rest controller for powerdown signal" in the source material (yes, rest, not reset, they said what they said 😭 keeping it 100% faithful bestie) — the reset controller for the powerdown signal 🔥
• rstc_rst — reset controller for the softreset signal ⭐ softreset specifically, don't get it twisted

ngl the rstc_pwrdn line is a whole typo moment but we're preserving it exactly bc that's the rule around here — facts stay, vibes are mine 💜

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🦋 SEE ALSO 🦋

if you wanna keep reading (and you should, this is a rabbit hole fr fr), the kernel file lives at ./drivers/usb/dwc3/dwc3-st.c — go say hi to it 🫶

• st_dwc3_drd_init(9)
• st_dwc3_init(9)

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and that's a wrap bestie 🎀 this page came from ./drivers/usb/dwc3 and it's dated October 2026 — mark your calendars, screenshot it, tell your friends 💖 you're officially a st_dwc3 understander now, periodt 🌈👑