rt5677_pll_calc(9)

🎀 rt5677_pll_calc 💅

okay so bestie, welcome to the Kernel API Manual — yes we're in kernel territory and yes it's iconic. this little function is literally the PLL math girlie of the family 🧮✨

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✨ NAME ✨

rt5677_pll_calc — calculate the PLL M/N/K code. (the original page spells it "Calcualte" and honestly? relatable. we stan a typo 👑)

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🌸 SYNOPSIS 🌸

int rt5677_pll_calc (const unsigned int freq_in , const unsigned int
       freq_out , struct rl6231_pll_code *pll_code );

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🦋 ARGUMENTS 🦋

• freq_in — the external clock that's being fed to the codec. like, the clock coming in. the source. the origin story 💖
• freq_out — the target clock the codec actually wants to work on. the glow-up destination ⭐
• pll_code — pointer to a structure holding the M, N, K, the bypass K flag and the bypass M flag. that's five little fields living their best life together 🫶

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💜 DESCRIPTION 💜

so what does it do? it calculates the M/N/K code and the bypass K/M flag so you can configure the PLL for the codec. that's the whole vibe. no cap 🔥

and the return situation: it returns 0 for success, or a negative error code if things didn't slay 😭

heads up bestie — negative error code means something went wrong, so please actually check the return value. i'm begging 🙈

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🌈 SEE ALSO 🌈

• Kernel file ./sound/soc/codecs/rt5677.c — go read the source, iykyk 🍓
• rt5677_dsp_mode_i2c_write_addr(9)
• rt5677_dsp_mode_i2c_read_addr(9)
• rt5677_dsp_mode_i2c_write(9)
• rt5677_dsp_mode_i2c_read(9)
• set_dmic_clk(9)
• rt5677_sel_asrc_clk_src(9)

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bestie that's the whole page, mwah 💋 this came out of ./sound/soc/codecs back in October 2026, so jot that down in your notes app 📝 — you're welcome, periodt 💅✨