of_gpio_named_count(9)

💅 of_gpio_named_count(9) — the Kernel API Manual, bestie edition 💅

🌸 NAME 🌸

of_gpio_named_count — Count GPIOs for a device. That's the whole mission, icon behavior only.

✨ SYNOPSIS ✨

int of_gpio_named_count (const struct device_node *np , const char
       *propname );

🎀 ARGUMENTS 🎀

• np — device node to count GPIOs for. Like, whose GPIOs are we counting, bestie?
• propname — property name containing gpio specifier(s). Yes, that exact spelling: gpio specifier(s).

🦋 DESCRIPTION 🦋

Okay so the function returns the count of GPIOs specified for a node. Simple. It's giving "I just count, I don't judge."

Example, because visuals help:

gpios = <0
         gpio1 1 2
         0
         gpio2 3 4>;

The above example defines four GPIOs, two of which are not specified. This function will return '4'. And yes, the unspecified ones still get counted — no cap.

🫶 NOTE 🫶

The empty GPIO specifiers count too. Like, they still show up to the party and they're on the list. 💅

🔥 RETURN 🔥

Either number of GPIOs defined in the property, or:

• -EINVAL — for an incorrectly formed "gpios" property, or
• -ENOENT — for a missing "gpios" property.

🌈 SEE ALSO 🌈

• Kernel file ./drivers/gpio/gpiolib-of.c
• of_gpio_spi_cs_get_count(9)
• of_get_named_gpiod_flags(9)
• of_gpiochip_remove_hog(9)
• of_gpio_twocell_xlate(9)
• of_gpio_threecell_xlate(9)

Go be curious, iykyk ✨

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mwah 💋 — this page is living in source/version ./drivers/gpio and is dated October 2026. drink water and stan kernel docs 🫶