STRUCT ROHM_DVS_CONFIG(9)

🌸 NAME 🌸

struct rohm_dvs_config — the register descriptions that do dynamic voltage scaling, bestie 💅

This is a page from the Kernel API Manual, and yes we're reading kernel struct docs for fun now, that's the vibe 🦋

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✨ SYNOPSIS ✨

struct rohm_dvs_config {
    uint64_t level_map;
    unsigned int run_reg;
    unsigned int run_mask;
    unsigned int run_on_mask;
    unsigned int idle_reg;
    unsigned int idle_mask;
    unsigned int idle_on_mask;
    unsigned int suspend_reg;
    unsigned int suspend_mask;
    unsigned int suspend_on_mask;
    unsigned int lpsr_reg;
    unsigned int lpsr_mask;
    unsigned int lpsr_on_mask;
    unsigned int snvs_reg;
    unsigned int snvs_mask;
    unsigned int snvs_on_mask;
 };

Like, look at her. Sixteen fields. A whole little wardrobe of registers and masks 🎀

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💖 Members 💖

Okay so every system state gets its own lil trio — a register address, a value mask, and an enable mask. Iconic, consistent, we love a pattern ✨

• level_map — a bitmap that represents which run-levels this regulator actually supports 👑 it's giving "here's my range, don't ask for more."
• run_reg — the register address for the regulator config when we're in the 'run' state 🔥
• run_mask — the value mask for the regulator voltages in the 'run' state 💜
• run_on_mask — the enable mask for the regulator in the 'run' state ✅
• idle_reg — register address for the regulator config in the 'idle' state 😴
• idle_mask — value mask for the regulator voltages in the 'idle' state 💜
• idle_on_mask — enable mask for the regulator in the 'idle' state ✅
• suspend_reg — register address for the regulator config in the 'suspend' state 🌙
• suspend_mask — value mask for the regulator voltages in the 'suspend' state 💜
• suspend_on_mask — enable mask for the regulator in the 'suspend' state ✅
• lpsr_reg — register address for the regulator config in the 'lpsr' state 🧚
• lpsr_mask — value mask for the regulator voltages in the 'lpsr' state 💜
• lpsr_on_mask — enable mask for the regulator in the 'lpsr' state ✅

Also chilling up in the struct: snvs_reg, snvs_mask and snvs_on_mask 🫶 those three show up in the definition above and that's all this page has to say about them, no cap.

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🦋 Description 🦋

So this whole struct is the description of the ROHM PMICs' voltage configuration registers across the different system states — run, idle, suspend, lpsr, the works 🌈

It's literally used to configure the PMIC correctly at startup, based on the values read from DT (device tree, iykyk) 🔥 Like, it's the translator between "what the device tree says" and "what the chip's registers need to hear." Main character energy fr fr.

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⭐ SEE ALSO ⭐

• Kernel file ./include/linux/mfd/rohm-generic.h — go read the source bestie, it's right there 💖

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Okay that's the whole page, you ate that 🍓 This little gem lives in ./include/linux/mfd and it's dated October 2026 — mwah, goodbye, slay 💅✨🎀