rza1_gpio_request(9)

✨ rza1_gpio_request(9) ✨

okay so bestie, welcome to the Kernel API Manual 🫶 this little cutie lives in section 9 and it's all about rza1_gpio_request — configuring a pin in port mode. let's get into it 💅

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🌸 NAME 🌸

rza1_gpio_request — configure pin in port mode

no cap, that's literally the whole job description. slay ✨

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🎀 SYNOPSIS 🎀

int rza1_gpio_request (struct gpio_chip *chip , unsigned int gpio );

she takes two things and returns an int, periodt 💖

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🦋 ARGUMENTS 🦋

• chip — the gpio chip where the gpio sits on 👑 like, where this pin actually lives, you know?
• gpio — the gpio offset 🎯 that's the little index that tells you which one

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⭐ DESCRIPTION ⭐

so what does she actually do?? she configures a pin as gpio (port mode) 💅 iconic behaviour, honestly.

but here's the tea 🍵 after reset, the pin is in input mode with input buffer disabled. literally just sitting there, no vibes, no signal. so if you actually want to use the pin as input or output, you gotta call set_direction first, okay??

bestie please don't forget set_direction — the pin is not gonna do anything for you until you do 🙈 it's not being dramatic, it's just how reset works 😭

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🌈 SEE ALSO 🌈

the whole friend group yk 😌 iykyk:

• Kernel file ./drivers/pinctrl/renesas/pinctrl-rza1.c — the actual source, go read it, it's giving main character energy 📖
• struct rza1_mux_conf(9)
• struct rza1_port(9)
• struct rza1_pinctrl(9)
• rza1_pin_reset(9)
• rza1_pin_set_direction(9) — yes, this one, the one from the description 👀
• rza1_pin_mux_single(9)
• rza1_gpio_free(9)
• rza1_gpio_get(9)
• rza1_dt_node_pin_count(9)
• rza1_parse_pinmux_node(9)
• rza1_dt_node_to_map(9)
• rza1_set_mux(9)
• rza1_parse_gpiochip(9)
• rza1_gpio_register(9)
• rza1_pinctrl_register(9)

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anyway that's the page bestie, go configure some pins responsibly 💜

source: ./drivers/pinctrl/renesas • dated: October 2026 • manual: rza1_gpio_request(9) — mwah, drink water, and don't forget set_direction 💅✨🍓