mma9551_read_accel_chan(9)

🎀 mma9551_read_accel_chan(9) 🎀

okay bestie, this little icon lives in the Kernel API Manual, and it's literally here to read an accelerometer channel. no cap, it's giving “small function, very specific job.” 💅

---

✨ NAME ✨

mma9551_read_accel_chan — read accelerometer channel. yes, that's the whole vibe. 🦋

✨ SYNOPSIS ✨

here's the signature, character-for-character, bestie:

int mma9551_read_accel_chan (struct i2c_client *client , const struct
       iio_chan_spec *chan , int *val , int *val2 );

✨ ARGUMENTS ✨

• client — I2C client. your I2C bestie, basically.
• chan — IIO channel. this is the channel we're reading, periodt.
• val — Pointer to the accelerometer value read. this is where the reading lands, so keep it cute and valid.
• val2 — Unused. literally just chilling there 🙈.

✨ DESCRIPTION ✨

Read accelerometer value for the specified channel. that's the whole assignment, and it ate. 💖

⚠️ Locking note: 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. no cap, that part is serious — handle your lock before you call this, bestie. 🔒

✨ RETURN ✨

IIO_VAL_INT on success, negative value on failure. slay when it works, sad little negative number when it doesn't 😭.

✨ SEE ALSO ✨

• Kernel file: ./drivers/iio/accel/mma9551_core.c
• Bestie function squad: mma9551_read_config_byte(9), mma9551_write_config_byte(9), mma9551_read_status_byte(9), mma9551_read_config_word(9), mma9551_write_config_word(9), mma9551_read_status_word(9), mma9551_read_config_words(9), mma9551_read_status_words(9), mma9551_write_config_words(9), mma9551_update_config_bits(9), mma9551_gpio_config(9), mma9551_read_version(9), mma9551_set_device_state(9), mma9551_set_power_state(9), mma9551_sleep(9), mma9551_read_accel_scale(9), mma9551_app_reset(9)

---

mwah 💋 — source/version corner: ./drivers/iio/accel, dated October 2026, all about mma9551_read_accel_chan(9) 💖✨