sdhci_arasa..._baseclkfreq(9)

🌸 sdhci_arasa..._baseclkfreq(9) — Kernel API Manual ✨

okay bestie, welcome to the sdhci_arasa..._baseclkfreq page, straight out of the Kernel API Manual. yes the title is truncated with dots, no that's not a typo, that's just how the man girlies abbreviate. iykyk 💅

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✨ NAME ✨

sdhci_arasan_update_baseclkfreq — literally just here to set corecfg_baseclkfreq. that's the whole job. icon behavior, honestly 🎀

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🦋 SYNOPSIS 🦋

void sdhci_arasan_update_baseclkfreq (struct sdhci_host *host );

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💖 ARGUMENTS 💖

• host — the sdhci_host, bestie. the main character of this whole function, fr fr 👑

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🌈 DESCRIPTION 🌈

so like… corecfg_baseclkfreq is supposed to contain the MHz of clk_xin. that's the assignment. that's the vibe. and this function? this function is the one that can be used to make that happen. slay ✨

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🫶 NOTES 🫶

• many existing devices don't seem to do this and work fine. like, they're out here thriving without it, no cap 😭 so — to keep compatibility for old hardware where the device tree doesn't provide a register map — this function is a noop if a soc_ctl_map hasn't been provided for this platform. it just. does nothing. respectfully 💀
• it's assumed that clk_xin is not dynamic and that we use the SDHCI divider to achieve lower clock rates. which means (and this is the important bit 👀) this function is called once at probe time and never called again. one and done. no encore. periodt 🌟

bestie pls don't call it in a loop expecting new results, that's not the assignment 🥺

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🧚 SEE ALSO 🧚

Kernel file ./drivers/mmc/host/sdhci-of-arasan.c struct sdhci_arasan_soc_ctl_field(9), 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), 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)

like, that's a lot of friends in the group chat, and they all ate 💜

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and that's the whole page, bestie!! tysm for reading mwah 🍓 this lil gem lives in ./drivers/mmc/host and was stamped October 2026 — go forth and set that baseclkfreq, ily, bye!! 🎀🦋💖