__adis_initial_startup(9)

💖 __adis_initial_startup — a Kernel API Manual moment 💖

okay so bestie, we're in the Kernel API Manual today and the star of the show is __adis_initial_startup. she's giving device initial setup main character energy and honestly? she ate. 🎀

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✨ SYNOPSIS ✨

int __adis_initial_startup (struct adis *adis );

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🫶 ARGUMENTS 🫶

• adis — the adis device. that's her. that's the whole vibe check right there 💅

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🌸 DESCRIPTION 🌸

so what does she actually do? buckle up, because it's a lot and it's iconic ✨

this function does a HW reset via a reset pin — and that reset pin should be specified via GPIOLIB. no pin configured? no problem, she'll just do a SW reset instead. flexible queen behavior honestly 🦋

oh and listen — the RST pin for the ADIS devices should be configured as ACTIVE_LOW. that's not a suggestion, that's the assignment 📝

after the self-test operation is performed, the function will also check that the product ID is as expected. lowkey a little overachiever. this assumes that drivers providing

(yes the sentence really does just end there in the original — I'm not gatekeeping anything from you, bestie, that's literally how it arrives in the source 💀)

she returns 0 if the device is operational, and a negative error code otherwise. so like, zero is her way of saying "we're so back" 🫶

this function should be called early on in the device initialization sequence to ensure that the device is in a sane and known state and that it is usable. early bird gets the working hardware, no cap 🔥

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🌈 SEE ALSO 🌈

kernel file ./drivers/iio/imu/adis.c, plus her whole friend group:

• __adis_write_reg(9)
• __adis_read_reg(9)
• __adis_update_bits_base(9)
• __adis_enable_irq(9)
• __adis_check_status(9)
• __adis_reset(9)
• adis_single_conversion(9)
• adis_init(9)

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and that's the whole page, bestie!! 🧚💜 this little beauty lives over in ./drivers/iio/imu, stamped October 2026 — so go forth, call her early, keep your state sane, and slay 💅👑🌸