__prci_wrpll_write_cfg0(9)

💅 __prci_wrpll_write_cfg0(9) — like, the whole page ✨

okay so bestie, this is a page out of the Kernel API Manual (yes, that manual, the big serious one) and honestly? it's a little baddie of a function. it writes WRPLL config into the PRCI, and we're gonna walk through it together, no cap 🫶

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✨ NAME ✨

__prci_wrpll_write_cfg0 — write WRPLL configuration into the PRCI 🔥

🌸 SYNOPSIS 🌸

look at this signature, it's giving main character energy:

void __prci_wrpll_write_cfg0 (struct __prci_data *pd , struct
__prci_wrpll_data *pwd , struct wrpll_cfg *c );

returns void, takes three pointers. simple. iconic. periodt 💅

🎀 ARGUMENTS 🎀

three besties walk into a function:

• pd — the PRCI context 💖
• pwd — the PRCI WRPLL metadata 🦋
• c — the WRPLL configuration record that's getting written ✨

💀 DESCRIPTION 💀

so what does it actually do? okay so:

it writes the WRPLL configuration described by c into the WRPLL configuration register identified by pwd, inside the PRCI instance described by c. yep, that's what the page says — c, not pd, don't come for me, I'm just the messenger 🙈 (iykyk)

and then — and this part is lowkey important — it makes a cached copy of the WRPLL's current configuration, so other code can use it later. thoughtful queen behavior 👑

🧚 CONTEXT 🧚

any context, bestie. literally any. 🌈

⚠️ but!!! the caller must prevent the records pointed to by pd and pwd from changing while this thing is executing. no switching up mid-run, that's the rule. 💀

🔥 SEE ALSO 🔥

the whole friend group, assembled:

• kernel file ./drivers/clk/sifive/sifive-prci.c
• __prci_readl(9)
• __prci_wrpll_unpack(9)
• __prci_wrpll_pack(9)
• __prci_wrpll_read_cfg0(9)
• __prci_wrpll_write_cfg1(9)
• sifive_prci_coreclksel_use_hfclk(9)
• sifive_prci_coreclksel_use_corepll(9)
• sifive_prci_coreclksel_use_final_corepll(9)
• sifive_prci_corepllsel_use_dvfscorepll(9)
• sifive_prci_corepllsel_use_corepll(9)
• sifive_prci_hfpclkpllsel_use_hfclk(9)
• sifive_prci_hfpclkpllsel_use_hfpclkpll(9)
• __prci_register_clocks(9)
• sifive_prci_probe(9)

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and that's the whole vibe check 🩷 this little page lives over in ./drivers/clk/sifive and it's dated October 2026 — so yeah, she's ahead of her time fr fr. go read the register, bestie, you got this 🎀✨💜