STRUCT SDHCI_ARASAN_SOC_CTL_FIELD(9)

💅 struct sdhci_arasan_soc_ctl_field 💅

okay bestie, welcome to the Kernel API Manual ✨ — this is the page for struct sdhci_arasan_soc_ctl_field, and no, the title up top isn't a typo, the manpage header literally truncates it to struct sdhc...oc_ctl_field(9) and honestly? she's mysterious. iykyk 🎀

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🌸 NAME 🌸

struct sdhci_arasan_soc_ctl_field — the little field descriptor used inside sdhci_arasan_soc_ctl_map. it's giving supporting character but she's essential, fr fr 🫶

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⭐ SYNOPSIS ⭐

struct sdhci_arasan_soc_ctl_field {
    u32 reg;
    u16 width;
    s16 shift;
};

look at her. three members. tiny. iconic. 👑

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🦋 Members 🦋

• reg — the offset, within the syscon, of the register that holds this field. like, which house on the street. u32 energy 💖
• width — how many bits this field is rockin'. that's her size, and it's a u16 🌈
• shift — the bit offset within reg where this field starts. or -1 if it's not available — yes bestie, -1 is the "she's not here rn" value, don't @ me 🙈 (also it's an s16, which is why it can even be negative in the first place, periodt)

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👑 SEE ALSO 👑

the whole squad 🫶 — and they all live in the kernel file ./drivers/mmc/host/sdhci-of-arasan.c:

• struct sdhci_arasan_soc_ctl_map(9)
• struct sdhci_arasan_clk_ops(9)
• struct sdhci_arasan_clk_data(9)
• struct sdhci_arasan_data(9)
• sdhci_arasan_syscon_write(9)
• sdhci_arasan_suspend(9)
• sdhci_arasan_resume(9)
• sdhci_arasan_sdcardclk_recalc_rate(9)
• sdhci_arasan_sampleclk_recalc_rate(9)
• sdhci_zynqmp_sdcardclk_set_phase(9)
• sdhci_zynqmp_sampleclk_set_phase(9)
• sdhci_versal_sdcardclk_set_phase(9)
• sdhci_versal_sampleclk_set_phase(9)
• sdhci_arasan_update_clockmultiplier(9)
• sdhci_arasan_update_baseclkfreq(9)
• arasan_dt_parse_clk_phases(9)
• sdhci_arasan_register_sdcardclk(9)
• sdhci_arasan_register_sampleclk(9)
• sdhci_arasan_unregister_sdclk(9)
• sdhci_arasan_update_support64b(9)
• sdhci_arasan_register_sdclk(9)

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ngl if you're reading this at 3am trying to figure out a syscon field offset, drink some water and then go read sdhci_arasan_soc_ctl_map(9) 💀 she's the main character, this struct is her lore.

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and that's the whole vibe check, bestie 🧚 this page came from ./drivers/mmc/host, dated October 2026, and it's filed under the very dramatic truncated name struct sdhc...oc_ctl_field(9) — slay, ate, no cap 💅✨🍓