pwm_apply_atomic(9)

🦋 pwm_apply_atomic(9) 🦋

okay so this is from the Kernel API Manual, section 9, and it’s giving “tiny but powerful kernel helper” energy. The function is pwm_apply_atomic, and yes bestie, the whole point is applying a new state to a PWM device from atomic context. ✨

✨ NAME ✨

pwm_apply_atomic — apply a new state to a PWM device from atomic context.

important vibe check: not all PWM devices support this function — check with pwm_might_sleep(). 💀 Don’t just assume, okay?

🌸 SYNOPSIS 🌸

int pwm_apply_atomic (struct pwm_device *pwm , const struct pwm_state
*state );

🎀 ARGUMENTS 🎀

• pwm — the PWM device. That’s the main character here. 👑
• state — the new state you want to apply. The glow-up in question. 💅

💖 RETURN 💖

It returns 0 on success, or a negative errno. That’s it — no mysterious extra values, no hidden drama. 😌

🔥 CONTEXT 🔥

Any — the context is literally any. 🫶

👑 SEE ALSO 👑

The kernel file is ./drivers/pwm/core.c, and the full bestie lineup is:

• pwm_round_waveform_might_sleep(9)
• pwm_get_waveform_might_sleep(9)
• pwm_set_waveform_might_sleep(9)
• pwm_apply_might_sleep(9)
• pwm_get_state_hw(9)
• pwm_adjust_config(9)
• pwm_capture(9)
• pwm_request_from_chip(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)

mwah 💋 — this page is signed off from the source/version tag ./drivers/pwm, dated October 2026, and yes she ate. 🫶💖