STRUCT STM_DRVDATA(9)

💅 struct stm_drvdata(9) 💅

okay so welcome to the Kernel API Manual, bestie — this page is literally all about struct stm_drvdata and we are gonna get into it 💖

💖 NAME 💖

struct stm_drvdata — specifics associated to an STM component. That's the whole vibe: it's the struct that holds the specifics for an STM component, periodt 👑

✨ SYNOPSIS ✨

okay so the shape is literally this, no cap:

struct stm_drvdata {
    void __iomem            *base;
    struct clk              *atclk;
    struct clk              *pclk;
    struct coresight_device *csdev;
    spinlock_t spinlock;
    struct channel_space    chs;
    struct stm_data         stm;
    u8 traceid;
    u32 write_bytes;
    u32 stmsper;
    u32 stmspscr;
    u32 numsp;
    u32 stmheer;
    u32 stmheter;
    u32 stmhebsr;
 };

👑 Members 👑

• base — the memory mapped base address for this component, bestie. It's giving "where the registers live" 🏠
• atclk — an optional clock for the core parts of the STM. optional, so no pressure, but if it's there it's iconic ⏰
• pclk — the APB clock if present, otherwise NULL. if it's missing, it's literally NULL, no cap 🫥
• csdev — the component vitals needed by the framework. essential little details, main character energy 💅
• spinlock — only one at a time pls. we are not doing chaos in here 😤
• chs — the channels accociated to this STM (spelling is part of the lore now 🫶)
• stm — the structure associated to the generic STM interface. the generic-interface bestie 🤝
• traceid — the value of the current ID for this component. current ID, current vibes ✨
• write_bytes — the Maximus bytes this STM can write at a time. yes, Maximus, capital M, iconic 😭
• stmsper — settings for register STMSPER 🎀
• stmspscr — settings for register STMSPSCR 🌸
• numsp — the total number of stimulus port support by this STM. that's the count, fr fr 🔢
• stmheer — settings for register STMHEER 💜
• stmheter — settings for register STMHETER 🦋
• stmhebsr — settings for register STMHEBSR ⭐

🦋 SEE ALSO 🦋

• Kernel file ./drivers/hwtracing/coresight/coresight-stm.c — go read it when you want the full behind-the-scenes, bestie 🔥

source/version: ./drivers/hwtracing/coresight · date: October 2026 · struct stm_drvdata(9) out, mwah 💋🫶