sg2042_pll_recalc_rate(9)

💅 sg2042_pll_recalc_rate 💅

okay so bestie, welcome to the Kernel API Manual, section 9, and today's main character is sg2042_pll_recalc_rate — she's literally the function that does the math for your PLLs ✨ ("Calculate rate for plls", no cap, that's her whole job description).

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🌸 SYNOPSIS 🌸

unsigned long sg2042_pll_recalc_rate (unsigned int reg_value , unsigned
long parent_rate );

like, she takes two things and gives you back an unsigned long, periodt 🎀

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🦋 ARGUMENTS 🦋

• reg_value — the current register value, iykyk 👑
• parent_rate — the parent frequency, aka where the vibe comes from 💜

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✨ DESCRIPTION ✨

so what she actually does?? she calculates the "rate" in this equation right here, and honestly it's giving math class but make it slay 🔥:

rate = (parent_rate/REFDIV) x FBDIV/POSTDIV1/POSTDIV2 = (parent_rate x FBDIV) /
(REFDIV x POSTDIV1 x POSTDIV2)

the way that it's the same thing written two ways… she's flexible like that 💅 both forms are literally in the original and I'm not picking favourites 🫶

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⭐ RETURN ⭐

The rate calculated. that's it, that's the return value, she ate and left no crumbs 😭💖

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🎀 SEE ALSO 🎀

• the kernel file ./drivers/clk/sophgo/clk-sg2042-pll.c — go read her home directory bestie 🏠
• struct sg2042_pll_clock(9) 🕐
• sg2042_pll_get_postdiv_1_2(9) 🌈
• sg2042_get_pll_ctl_setting(9) ⚙️
• sg2042_clk_pll_recalc_rate(9) 💫

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ngl these are the siblings and cousins of our girl, the whole friend group is iconic, check them out fr fr 🧚

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okay that's the whole page!! huge shoutout to ./drivers/clk/sophgo for being the source, and to October 2026 for the date — mwah, thanks for reading bestie, you understood it perfectly, I'm so proud of you 🍓💜💅