hw_ep_bit(9)

💅 hw_ep_bit(9) — from the Kernel API Manual, section 9, bestie

okay so real talk, this is a tiny little kernel function from the Kernel API Manual (that's the manual name, section 9, kernel API territory, we're in the big leagues now) and it's literally just here to do one job. one. and honestly? she does it. slay.

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✨ NAME ✨

hw_ep_bit — no cap, all she does is calculate the bit number

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🎀 SYNOPSIS 🎀

int hw_ep_bit (int num , int dir );

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🌸 ARGUMENTS 🌸

• num — the endpoint number, iykyk
• dir — the endpoint direction 🧭

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🦋 DESCRIPTION 🦋

so the whole vibe of this function is that it returns the bit number. that's it. that's the function. she's not doing your laundry, she's not refactoring your driver, she's returning the bit number and then she's leaving. main character energy but make it minimal 💅

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🔥 SEE ALSO 🔥

bestie the reference list is long, so buckle up, we're going through the whole friend group 👑

Kernel file ./drivers/usb/chipidea/udc.c — plus these icons:

• hw_device_state(9)
• hw_ep_flush(9)
• hw_ep_disable(9)
• hw_ep_enable(9)
• hw_ep_get_halt(9)
• hw_ep_prime(9)
• hw_ep_set_halt(9)
• hw_port_is_high_speed(9)
• hw_test_and_clear_complete(9)
• hw_test_and_clear_intr_active(9)
• hw_test_and_clear_setup_guard(9)
• hw_test_and_set_setup_guard(9)
• hw_usb_set_address(9)
• hw_usb_reset(9)
• _usb_addr(9)
• _hardware_enqueue(9)
• free_pending_td(9)
• _hardware_dequeue(9)
• _ep_nuke(9)
• _gadget_stop_activity(9)
• isr_reset_handler(9)
• isr_get_status_complete(9)
• _ep_queue(9)
• isr_get_status_response(9)
• isr_setup_status_complete(9)
• isr_setup_status_phase(9)
• isr_tr_complete_low(9)
• isr_setup_packet_handler(9)
• isr_tr_complete_handler(9)
• ci_udc_start(9)
• udc_start(9)
• udc_stop(9)
• ci_hdrc_gadget_init(9)

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and that's the whole page, bestie 🫶 no notes, no cap.

ngl if you needed more than "it returns the bit number," this is not the manpage for you 🙈 she said what she said.

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mwah 💋 this gem lives over in ./drivers/usb/chipidea and the whole thing is dated October 2026 — so yeah, she's from the future, we stan a forward-thinking icon ⭐🌈