pwm_request_from_chip(9)

💖 pwm_request_from_chip(9) 💖

okay bestie, this is pwm_request_from_chip(9) from the Kernel API Manual — and the whole vibe is request a PWM device relative to a PWM chip. no cap, that's literally the assignment. 🎀

🌸 NAME 🌸

pwm_request_from_chip — request a PWM device relative to a PWM chip. periodt. 💅

✨ SYNOPSIS ✨

struct pwm_device * pwm_request_from_chip (struct pwm_chip *chip ,
       unsigned int index , const char *label );

🦋 ARGUMENTS 🦋

• chip — the PWM chip in question. this is the main-character chip you're asking through. 👑
• index — per-chip index of the PWM to request. literally the index, bestie, don't fudge it. ✨
• label — a literal description string of this PWM. like a tiny name tag for the PWM. 🏷️

🔥 RETURN 🔥

A pointer to the PWM device at the given index of the given PWM chip. 🫶

A negative error code is returned if the index is not valid for the specified PWM chip or if the PWM device cannot be requested. 😭

🌈 SEE ALSO 🌈

Kernel file ./drivers/pwm/core.c is the source-file mention, and here's the whole friend group:

• pwm_round_waveform_might_sleep(9)
• pwm_get_waveform_might_sleep(9)
• pwm_set_waveform_might_sleep(9)
• pwm_apply_might_sleep(9)
• pwm_apply_atomic(9)
• pwm_get_state_hw(9)
• pwm_adjust_config(9)
• pwm_capture(9)
• of_pwm_get(9)
• acpi_pwm_get(9)
• pwm_get(9)
• pwm_put(9)
• devm_pwm_get(9)
• devm_fwnode_pwm_get(9)
• __pwmchip_add(9)
• pwmchip_remove(9)
• pwm_add_table(9)
• pwm_remove_table(9)

this cutie comes from the ./drivers/pwm source and the October 2026 date, and the page itself is pwm_request_from_chip(9) — mwah 💋