STRUCT QCOM_RAMP_CONTROLLER_DESC(9)

✨ struct qcom_ramp_controller_desc — SoC specific parameters ✨

okay so this is from the Kernel API Manual, section 9 bestie — it's the lil struct that holds all the SoC-specific deets for the Qualcomm ramp controller 🎀 buckle up, it's actually so good.

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🌸 NAME 🌸

struct qcom_ramp_controller_desc — SoC specific parameters. literally that's the whole vibe: it's the descriptor that carries the board-specific knobs 🦋

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💖 SYNOPSIS 💖

struct qcom_ramp_controller_desc {
    const struct reg_sequence *cfg_dfs_sid;
    const struct reg_sequence *cfg_link_sid;
    const struct reg_sequence *cfg_lmh_sid;
    const struct reg_sequence *cfg_ramp_en;
    const struct reg_sequence *cfg_ramp_dis;
    u8 cmd_reg;
    u8 num_dfs_sids;
    u8 num_link_sids;
    u8 num_lmh_sids;
    u8 num_ramp_en;
    u8 num_ramp_dis;
 };

no cap, that's the whole struct 👑 copy it exactly, don't be creative with the field names 💅

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🌈 Members 🌈

okay bestie, field-by-field, let's go 🫶

• cfg_dfs_sid — Dynamic Frequency Scaling SID configuration ✨
• cfg_link_sid — Link SID configuration 🌸
• cfg_lmh_sid — Limits Management hardware SID configuration 💜
• cfg_ramp_en — Ramp Controller enable sequence 🔥
• cfg_ramp_dis — Ramp Controller disable sequence 💀
• cmd_reg — Command register offset 🎀
• num_dfs_sids — Number of DFS SIDs (max 8) ⭐
• num_link_sids — Number of Link SIDs (max 3) ⭐
• num_lmh_sids — Number of LMh SIDs (max 8) ⭐
• num_ramp_en — Number of entries in enable sequence 🦋
• num_ramp_dis — Number of entries in disable sequence 🦋

🚨 bestie heads up: the maxes are literally in the source — 8 DFS SIDs, 3 Link SIDs, 8 LMh SIDs. don't be out here overflowing those counts, it's giving undefined chaos 😭

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🧚 SEE ALSO 🧚

the kernel file lives at ./drivers/soc/qcom/ramp_controller.c — and the whole friend group is:

• struct qcom_ramp_controller(9)
• rc_wait_for_update(9)
• rc_set_cfg_update(9)
• rc_write_cfg(9)
• rc_ramp_ctrl_enable(9)
• qcom_ramp_controller_start(9)

all in ./drivers/soc/qcom 🏠 iykyk 💅

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periodt, that's the page 💖 this lil gem is dated October 2026 and comes straight out of ./drivers/soc/qcom — mwah, go read ramp_controller.c bestie, slay 💅✨