ucb1x00_io_set_dir(9)

💅 ucb1x00_io_set_dir(9) — Kernel API Manual 💅

okay bestie, this is the manual page for ucb1x00_io_set_dir(9) from the Kernel API Manual, and it’s lowkey all about telling the UCB1x00 chip which of its IO pins are inputs and which are outputs. ✨

🌸 NAME 🌸

ucb1x00_io_set_dir — set IO direction

🎀 SYNOPSIS 🎀

void ucb1x00_io_set_dir (struct ucb1x00 *ucb , unsigned int in ,
       unsigned int out );

🦋 ARGUMENTS 🦋

• ucb — UCB1x00 structure describing chip, with type struct ucb1x00 *. it’s giving “which chip are we talking to?” energy.
• in — bitfield of IO pins to be set as inputs. input girlies, assemble. 💖
• out — bitfield of IO pins to be set as outputs. output delegation, periodt. 🔥

✨ DESCRIPTION ✨

So this function sets the IO direction of the ten general purpose IO pins on the UCB1x00 chip. ten pins, one bitfield vibe check. 💅

important: the in bitfield has priority over the out bitfield. if you specify a pin as both input and output, it will end up as an input. in ate, no cap. 👑

ucb1x00_enable must have been called to enable the comms before using this function. like, enable the comms first, bestie, or you’re not gonna have a good time. 🫶

This function takes a spinlock, disabling interrupts. so yeah, it’s doing real kernel business in there. 🔒

🌈 SEE ALSO 🌈

• Kernel file ./drivers/mfd/ucb1x00-core.c
• ucb1x00_io_write(9)
• ucb1x00_io_read(9)
• ucb1x00_adc_enable(9)
• ucb1x00_adc_read(9)
• ucb1x00_adc_disable(9)

xoxo, this page is from ./drivers/mfd 💖 dated October 2026 🎀