STRUCT DWC2_DREGS_BACKUP(9)

💖 NAME 💖

okay so bestie, welcome to the struct dwc2_dregs_backup(9) page from the Kernel API Manual ✨ and it is literally giving “save the vibe before the nap” energy: this struct Holds device registers state before entering partial power down 💅. That’s the whole main-character job. No cap.

✨ SYNOPSIS ✨

the way this struct is built is so “back up everything before partial power down” 🎀 — here’s the exact shape, character for character:

struct dwc2_dregs_backup {
    u32 dcfg;
    u32 dctl;
    u32 daintmsk;
    u32 diepmsk;
    u32 doepmsk;
    u32 diepctl[MAX_EPS_CHANNELS];
    u32 dieptsiz[MAX_EPS_CHANNELS];
    u32 diepdma[MAX_EPS_CHANNELS];
    u32 doepctl[MAX_EPS_CHANNELS];
    u32 doeptsiz[MAX_EPS_CHANNELS];
    u32 doepdma[MAX_EPS_CHANNELS];
    u32 dtxfsiz[MAX_EPS_CHANNELS];
    bool valid;
};

🎀 Members 🎀

every single member, no skipping, periodt 🫶:

• dcfg — Backup of DCFG register 💖
• dctl — Backup of DCTL register 💖
• daintmsk — Backup of DAINTMSK register 💖
• diepmsk — Backup of DIEPMSK register 💖
• doepmsk — Backup of DOEPMSK register 💖
• diepctl — Backup of DIEPCTL register 💖
• dieptsiz — Backup of DIEPTSIZ register 💖
• diepdma — Backup of DIEPDMA register 💖
• doepctl — Backup of DOEPCTL register 💖
• doeptsiz — Backup of DOEPTSIZ register 💖
• doepdma — Backup of DOEPDMA register 💖
• dtxfsiz — Backup of DTXFSIZ registers for each endpoint 💖
• valid — True if registers values backuped. 💖

🦋 SEE ALSO 🦋

go check these besties for the full lore 🫶 — the kernel file is ./drivers/usb/dwc2/core.h, and the SEE ALSO squad is:

• struct dwc2_hsotg_ep(9)
• struct dwc2_hsotg_req(9)
• struct dwc2_core_params(9)
• struct dwc2_hw_params(9)
• struct dwc2_gregs_backup(9)
• struct dwc2_hregs_backup(9)
• struct dwc2_hsotg(9)

mwah 💋 — source/version: ./drivers/usb/dwc2; date: October 2026 🌈