msa311_set_odr(9)

🎀 msa311_set_odr(9) 🎀

okay bestie, we're in the Kernel API Manual, section 9, and today's main character is msa311_set_odr — literally the function that sets the Output Data Rate on the MSA311 accelerometer. yes, that one. let's get into it 💅

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✨ NAME ✨

msa311_set_odr — Setup Output Data Rate (ODR) value for MSA311 accel 🦋

✨ SYNOPSIS ✨

int msa311_set_odr (struct msa311_priv *msa311 , unsigned int odr );

like, that's the whole signature. no cap.

✨ ARGUMENTS ✨

• msa311 — the MSA311 internal private state, aka its whole little diary of vibes 🙈
• odr — the requested ODR value. the one you're asking for. be nice to it.

✨ DESCRIPTION ✨

okay so hear me out — this function should be called under msa311->lock. like, that's not a suggestion, that's the rule. hold the lock, bestie, or things get messy 😭

Here are the possible ODR values, and yes I'm listing every single one because they all matter:

• 1Hz (not available in normal mode) 🍓
• 1.95Hz (not available in normal mode) 🍓
• 3.9Hz
• 7.81Hz
• 15.63Hz
• 31.25Hz
• 62.5Hz
• 125Hz
• 250Hz
• 500Hz
• 1000Hz

the way that first two are lowkey restricted to non-normal power modes... iykyk 👑

✨ RETURN ✨

• 0 on success — slay, it worked 💖
• -EINVAL for a bad ODR value in the certain power mode — like, wrong value for that mode, be so fr
• -ERRNO in other failures — the generic "something went sideways" bucket 💀

✨ SEE ALSO ✨

• Kernel file ./drivers/iio/accel/msa311.c struct msa311_priv(9) — go read the source, it's giving main character energy
• msa311_get_odr(9)
• msa311_wait_for_next_data(9)
• msa311_set_pwr_mode(9)
• msa311_get_axis(9)

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✨ reminder bestie: call it under msa311->lock or the vibe check fails ✨

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and that's the page! brought to you by the fine folks living in ./drivers/iio/accel, stamped October 2026, page msa311_set_odr(9) — mwah, go set some ODRs responsibly 🫶🌸💜