zynqmp_pinct...unction_info(9)

💅 zynqmp_pinct...unction_info(9) — bestie's field guide

okay so this is from the Kernel API Manual, and yes the man page name is literally zynqmp_pinct...unction_info(9) — that's not me being lazy, that's the truncated title, the real star of the show is zynqmp_pinctrl_prepare_function_info. grab a snack, we're learning pinctrl 🎀

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✨ NAME ✨

zynqmp_pinctrl_prepare_function_info — prepare function info 💖 (yes that's the whole job, and she does it well)

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🌸 SYNOPSIS 🌸

int zynqmp_pinctrl_prepare_function_info (struct device *dev , struct
zynqmp_pinctrl *pctrl );

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🦋 ARGUMENTS 🦋

• dev — the Device pointer. your classic device handle, nothing chaotic 💫
• pctrl — Pin control driver data. this is your girl, she's holding all the driver state

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🔥 DESCRIPTION 🔥

so what's the vibe? this function goes and queries the firmware for functions, groups and pin information, then prepares the pin control driver data. main character energy honestly 👑

first move: query the number of functions and the number of function groups (that's how many groups live inside the given function) so it can allocate the memory buffers needed for functions and groups. gotta know how big the box is before you fill it 🎁

once those buffers are allocated to store functions and groups data, it queries and stores the info it actually needs:

• number of groups and group names for each function
• number of pins and pin numbers for each group

and that's it, that's the pipeline. she ate and left no crumbs 🍓

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⭐ RETURN ⭐

0 on success, else error code. no cap — anything that isn't 0 means something went sideways 😭

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🫶 SEE ALSO 🫶

Kernel file ./drivers/pinctrl/pinctrl-zynqmp.c and honestly the whole friend group:

• struct zynqmp_pmux_function(9)
• struct zynqmp_pinctrl(9)
• struct zynqmp_pctrl_group(9)
• zynqmp_pmux_get_function_groups(9)
• zynqmp_pinmux_set_mux(9)
• zynqmp_pinconf_cfg_get(9)
• zynqmp_pinconf_cfg_set(9)
• zynqmp_pinconf_group_set(9)
• zynqmp_pinctrl_prepare_func_groups(9)
• zynqmp_pinctrl_create_pin_groups(9)
• zynqmp_pinctrl_prepare_group_pins(9)
• zynqmp_pinctrl_prepare_pin_desc(9)

go read them, iykyk 💜

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okay that's the page!! droppin' the details at the end like a cute lil sign-off: this one lives in ./drivers/pinctrl and the date on it is October 2026 🌈 and the manual name, one more time for the cheap seats — zynqmp_pinct...unction_info(9). slay, go build a kernel bestie 💅✨