mma9551_read_status_word(9)

📦 version 7.3.1, in nixpkgs unstable

💅 mma9551_read_status_word — read 1 status word

ok so this is a page from the Kernel API Manual (that's the manual name, bestie, we're in the big leagues now) and it's about one single tiny function that reads exactly one status word off an MMA955xL device. one word. that's the whole gig. and honestly? she ate. ✨

🌸 SYNOPSIS

int mma9551_read_status_word(struct i2c_client *client, u8 app_id,
                             u16 reg, u16 *val);

🎀 ARGUMENTS

  • client — the I2C client. like, the actual device you're talking to 🫶
  • app_id — Application ID. which app's little world we're poking at.
  • reg — Application register. the exact spot inside that app.
  • val — Pointer to store value read. you hand her a spot in memory and she fills it in, no cap 💖

✨ DESCRIPTION

She reads one status word from the device using the MMA955xL command format. and here's the lore: commands to the MMA955xL platform are made of a write followed by one or more reads. that's the protocol, that's the vibe, respect it. 🔥

⚠️ Locking note, and this one is serious: this function must be called with the device lock held. Locking is not handled inside the function. Callers should ensure they serialize access to the HW. so like… if you skip the lock, you and your threads are gonna have a bad time, and not in the cute way 😭🔒

⭐ RETURN

0 on success, negative value on failure. that's it, that's the whole report card 💀

🦋 SEE ALSO

Kernel file ./drivers/iio/accel/mma9551_core.c — that's where she lives, go say hi:

okay bye bestie 🧚💜 this page came from ./drivers/iio/accel, dated October 2026, and it's giving main character energy for a function that literally reads one word. iconic. periodt. 🌈👑

📦 where this page comes from