testmode_write(9)

🎀 testmode_write(9) 🎀

okay bestie, this page is from the Kernel API Manual, and it's literally all about testmode_write — the function that changes usb test mode state. no cap. 💅

✨ NAME ✨

testmode_write — change usb test mode state.

🌈 SYNOPSIS 🌈

ssize_t testmode_write (struct file *file , const char __user *ubuf ,
       size_t count , loff_t *ppos );

💖 ARGUMENTS 💖

• file — The file to write to. like, the file you're writing into, bestie. 🫶
• ubuf — The buffer where user wrote. it's the user-side buffer that got written to. ✨
• count — The ubuf size. literally how big that buffer is. 📏
• ppos — Unused parameter. it's just sitting there, iconic but unused. 💀

🦋 SEE ALSO 🦋

• Kernel file ./drivers/usb/dwc2/debugfs.c — testmode_show(9), state_show(9), fifo_show(9), ep_show(9), dwc2_hsotg_create_debug(9)

that's the whole vibe 💫 source/version: ./drivers/usb/dwc2 · date: October 2026 · bye bestie 🫶