STRUCT PCS_FUNCTION(9)

💅 struct pcs_function(9) — like, the whole Kernel API Manual page, bestie

okay so this is a page straight out of the Kernel API Manual (yes, struct pcs_function(9), that one 🎀) and it's genuinely so niche and so good. it's the little struct that holds a pinctrl function and honestly it ate.

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✨ NAME ✨

struct pcs_function — pinctrl function. that's it. that's the whole vibe. short, iconic, no notes 🦋

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🌸 SYNOPSIS 🌸

here's the shape of it, copied exactly, do not touch:

struct pcs_function {
    const char *name;
    struct pcs_func_vals *vals;
    unsigned nvals;
    struct pcs_conf_vals *conf;
    int nconfs;
    struct list_head node;
 };

like, look at her. six members, zero drama, main character energy 💜

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🫶 Members 🫶

okay so let's go member by member, no skips, we don't skip here:

• name — the pinctrl function name. literally just the name. icon behavior ✨
• vals — register and vals array. it's the array, bestie, it holds the register-and-vals situation 📋
• nvals — number of entries in the vals array. the count. the how-many. keep them straight or it's giving 💀
• conf — array of pin configurations. a whole separate array of pin configs, obsessed 🌈
• nconfs — number of pin configurations available. yes, that's how many confs there are, we counting 🎀
• node — list node. a struct list_head, so she can be linked into a list, very social of her 💅

ngl the trickiest part of this whole page is not mixing up nvals (for vals) with nconfs (for conf). two counts, two arrays, two very different jobs 😭

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👑 SEE ALSO 👑

these are all from the kernel file ./drivers/pinctrl/pinctrl-single.c, and lowkey this list is a whole friend group:

• struct pcs_func_vals(9)
• struct pcs_conf_vals(9)
• struct pcs_conf_type(9)
• struct pcs_gpiofunc_range(9)
• struct pcs_data(9)
• struct pcs_soc_data(9)
• struct pcs_device(9)
• pcs_add_pin(9)
• pcs_allocate_pin_table(9)
• pcs_add_function(9)
• pcs_get_pin_by_offset(9)
• pcs_parse_one_pinctrl_entry(9)
• pcs_dt_node_to_map(9)
• pcs_irq_free(9)
• pcs_free_resources(9)
• struct pcs_interrupt(9)
• pcs_irq_set(9)
• pcs_irq_mask(9)
• pcs_irq_unmask(9)
• pcs_irq_set_wake(9)
• pcs_irq_handle(9)
• pcs_irq_handler(9)
• pcs_irq_chain_handler(9)
• pcs_irq_init_chained_handler(9)
• pcs_quirk_missing_pinctrl_cells(9)

like, that's the whole squad fr fr 🔥

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and that's the page!! source is ./drivers/pinctrl, dated October 2026 — so yeah, this one's from the future, we stay ahead 💜✨ go read the whole squad of pcs pages, you'll be slaying pinctrl in no time, periodt 🎀🦋💅