usb_of_get_companion_dev(9)

✨ NAME ✨

okay so this is the usb_of_get_companion_dev(9) page from the Kernel API Manual, and it's literally here to help you find the companion device 💖

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🌸 SYNOPSIS 🌸

struct device * usb_of_get_companion_dev (struct device *dev );

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🎀 ARGUMENTS 🎀

• dev — the device pointer you're using to go find a companion. It's the starting point, bestie 🫶

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🦋 DESCRIPTION 🦋

This function finds the companion device from the platform bus. slay.

It takes a reference to the returned struct device, and that reference needs to be dropped after use. So like… don't forget to clean up after yourself, okay? 💅

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⭐ RETURN ⭐

On success, you get a pointer to the companion device. On failure, you get NULL. That's the whole vibe check 😭

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🔥 SEE ALSO 🔥

Kernel file ./drivers/usb/common/common.c plus these little icons:

• usb_ep_type_string(9)
• usb_otg_state_string(9)
• usb_speed_string(9)
• usb_get_maximum_speed(9)
• usb_get_maximum_ssp_rate(9)
• usb_state_string(9)
• usb_get_dr_mode_from_string(9)
• usb_get_role_switch_default_mode(9)
• usb_decode_interval(9)
• of_usb_get_dr_mode_by_phy(9)
• of_usb_host_tpl_support(9)
• of_usb_update_otg_caps(9)

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mwah 💋 this page lives in ./drivers/usb/common, dated October 2026, and it's the usb_of_get_companion_dev(9) manual — bye bestie, go drop that reference 🌈🫶