STRUCT CLOCKDOMAIN(9)

💖 NAME 💖

struct clockdomain — the OMAP clockdomain, bestie. that's it, that's the whole vibe ✨

oh also quick thing: this page lives in the Kernel API Manual, section 9. knew you'd want to know 🫶

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🌸 SYNOPSIS 🌸

struct clockdomain {
    const char *name;
    union {
      const char *name;
      struct powerdomain *ptr;
    } pwrdm;
    const u16 clktrctrl_mask;
    const u8 flags;
    u8 _flags;
    const u8 dep_bit;
    const u8 prcm_partition;
    const u16 cm_inst;
    const u16 clkdm_offs;
    struct clkdm_dep *wkdep_srcs;
    struct clkdm_dep *sleepdep_srcs;
    int usecount;
    int forcewake_count;
    struct list_head node;
    u32 context;
 };

like, look at her. she's structured. she's organized. main character energy fr 💅

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🎀 Members 🎀

okay so let's go through every single field one by one, no skips, no cap:

• name — the clockdomain's name. literally what she's called 💖
• pwrdm — the powerdomain that contains this clockdomain. it's a union, and the two arms are const char *name and struct powerdomain *ptr — yes girl, both. 🦋
• clktrctrl_mask — the CLKTRCTRL/AUTOSTATE field mask in the CM_CLKSTCTRL reg 🔥
• flags — clockdomain capability flags ✨
• _flags — flags for use only by internal clockdomain code. not your business, bestie 🙈
• dep_bit — bit shift of this clockdomain's PM_WKDEP/CM_SLEEPDEP bit 🧚
• prcm_partition — (OMAP4 only) PRCM partition ID for this clkdm's registers
• cm_inst — (OMAP4 only) CM instance register offset
• clkdm_offs — (OMAP4 only) CM clockdomain register offset
• wkdep_srcs — clockdomains that can be told to wake this powerdomain up 👑
• sleepdep_srcs — clockdomains that can be told to keep this clkdm from inact
• usecount — usecount tracking 🍓
• forcewake_count — usecount for forcing the domain active ⭐
• node — the list_head that links all clockdomains together. the social butterfly of the struct, lowkey 🌈

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💜 Description 💜

these are the "you better get this right or nothing works" rules for the OMAP4-only fields, so listen up bestie 😭

• prcm_partition should be a macro from mach-omap2/prcm44xx.h (OMAP4 only)
• cm_inst should be a macro ending in _INST from the OMAP4 CM instance definitions (OMAP4 only)
• clkdm_offs should be a macro ending in _CDOFFS from the OMAP4 CM instance definitions (OMAP4 only)

ngl these are the kind of things where you don't "just know" them — you go look up the macro. the manpage is telling you where the macro lives, so use it 🙏

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🦋 SEE ALSO 🦋

• Kernel file ./arch/arm/mach-omap2/clockdomain.h
• struct clkdm_autodep(9)
• struct clkdm_dep(9)
• struct clkdm_ops(9)

go read those too, iykyk 💅

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and that's the whole page!! mwah 💖 this one shipped from ./arch/arm/mach-omap2, dated October 2026 — so like, mark your calendar bestie, and go wake up a powerdomain for me 🌸✨🎀