STRUCT DIV_NMP(9)

👑 struct div_nmp(9) — the Kernel API Manual glow-up 👑

okay so bestie, we're in the kernel docs again (specifically the manual page called struct div_nmp(9), yes that's the whole name, don't @ me) and today's main character is a struct that is obsessed with where things sit and how wide they are. It's giving "I know my shifts and my widths and I will not let you forget them." 💅

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✨ NAME ✨

struct div_nmp — literally just the offset and width of the m, n and p fields. That's it, that's the whole job, and it does it flawlessly 🫶

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🌈 SYNOPSIS 🌈

struct div_nmp {
    u8 divn_shift;
    u8 divn_width;
    u8 divm_shift;
    u8 divm_width;
    u8 divp_shift;
    u8 divp_width;
    u8 override_divn_shift;
    u8 override_divm_shift;
    u8 override_divp_shift;
 };

no cap, that's the exact shape of it — commit it to memory, bestie 🧠✨

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🎀 Members 🎀

nine little u8s and every single one of them matters, let's meet the cast 💖

• divn_shift — the shift to the feedback divider bit field 🔥
• divn_width — the width of the feedback divider bit field, iconic, no notes
• divm_shift — the shift to the input divider bit field 💫
• divm_width — the width of the input divider bit field, slay
• divp_shift — the shift to the post divider bit field 🌸
• divp_width — the width of the post divider bit field, we love a consistent queen
• override_divn_shift — the shift to the feedback divider bitfield in the override reg 👀 (yes, it says bitfield, one word, we respect the original spelling)
• override_divm_shift — the shift to the input divider bitfield in the override reg 🙈
• override_divp_shift — the shift to the post divider bitfield in the override reg ⭐

lowkey the pattern is so clean it hurts: n = feedback, m = input, p = post. three divider besties, three shifts, three widths, and then the override shifts for the override reg. periodt 💅

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🦋 SEE ALSO 🦋

the whole friend group, all living in the Kernel file ./drivers/clk/tegra/clk.h — go say hi bestie, they're all linked and they all have their own manual pages:

• struct tegra_clk_sync_source(9)
• struct tegra_clk_frac_div(9)
• struct tegra_clk_pll_freq_table(9)
• struct pdiv_map(9)
• struct tegra_clk_pll_params(9)
• struct tegra_clk_pll(9)
• struct tegra_audio_clk_info(9)
• struct tegra_clk_pll_out(9)
• struct tegra_clk_periph_regs(9)
• struct tegra_clk_periph_gate(9)
• struct tegra_sdmmc_mux(9)

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and that's the page, diva 💜 this little struct came to you from ./drivers/clk/tegra, dated October 2026, and honestly it ate. go read the tegra clock headers, ily, bye 🎀✨🦋