STRUCT COMMAND_PROTOCOL_TP_INFO(9)

✨ struct command_protocol_tp_info(9) ✨

okay bestie, welcome to the Kernel API Manual 💅 this one's a lil baby struct from the Linux kernel docs and it's literally just vibing in ./drivers/input/keyboard. grab a strawberry 🍓 and let's get into it.

---

🌸 NAME 🌸

struct command_protocol_tp_info — get touchpad info, periodt. 🫶

like, the whole personality of this struct is: message.type = 0x1020, message.length = 0x0000. that's it. that's the tweet. no cap.

---

🎀 SYNOPSIS 🎀

struct command_protocol_tp_info {
    __le16 crc16;
};

look at her. one single member. main character energy but make it minimal ✨

---

🦋 Members 🦋

• crc16 — this is the crc over the whole message struct (so the message header plus this struct) minus this crc16 field itself. iykyk, you don't checksum the checksum 🙈 it's giving "don't count yourself in your own group project" fr fr.

---

💜 SEE ALSO 💜

go touch some grass in the kernel source, bestie, specifically Kernel file ./drivers/input/keyboard/applespi.c and then these iconic siblings:

• struct keyboard_protocol(9)
• struct tp_finger(9)
• struct touchpad_protocol(9)
• struct touchpad_info_protocol(9)
• struct command_protocol_mt_init(9)
• struct command_protocol_capsl(9)
• struct command_protocol_bl(9)
• struct message(9)
• struct spi_packet(9)

the way that's a whole friend group 😭🫶

---

ngl there's not a lot here, but that's the point — 0x1020 means "hey, tell me about the touchpad" and 0x0000 means "no payload, we're just asking." slay.

---

and that's the whole page, bestie! 🧚 source/version: ./drivers/input/keyboard, dated October 2026 — catch you in the next manpage, mwah 💖