STRUCT WILCO_EC_RESPONSE(9)

💌 struct wilco_ec_response(9) — bestie edition 💌

okay so this is a page from the Kernel API Manual (the struct wilco_ec_response(9) one, iykyk) and it's literally the whole vibe of a mailbox response message format. it's giving "the EC wrote back and here's the envelope" energy 🎀

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✨ NAME ✨

struct wilco_ec_response — Mailbox response message format. that's it, that's the whole name, slay.

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🦋 SYNOPSIS 🦋

struct wilco_ec_response {
    u8 struct_version;
    u8 checksum;
    u16 result;
    u16 data_size;
    u8 reserved[2];
    u8 data[];
 };

look at her. iconic struct. no cap 💅

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🌸 Members 🌸

• struct_version — Should be EC_MAILBOX_PROTO_VERSION. like, that's the assignment bestie, don't freestyle it 💖
• checksum — Sum of all bytes must be 0. yes, all of them. every single byte pulling its weight so the total lands on zero ✨
• result — Result code from the EC. Non-zero indicates an error. so if this isn't zero, something went wrong and we're like 😭
• data_size — Length of the response data buffer. just telling you how much data you actually got 🎀
• reserved — Set to zero. that's it. zero. don't be quirky about it 🙈
• data — Response data buffer. Max size is EC_MAILBOX_DATA_SIZE_EXTENDED. the actual payload, the main character of the struct 👑

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🔥 SEE ALSO 🔥

• Kernel file ./include/linux/platform_data/wilco-ec.h struct wilco_ec_device(9), struct wilco_ec_request(9), enum wilco_ec_msg_type(9), struct wilco_ec_message(9), wilco_ec_mailbox(9), wilco_keyboard_leds_init(9), wilco_ec_get_property(9), wilco_ec_set_property(9), wilco_ec_get_byte_property(9), wilco_ec_add_sysfs(9)

like, go read the whole friend group, they all hang out together 🫶

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🌈 friendly reminder: the reserved bytes are zero and the checksum sum must be zero, and struct_version should be EC_MAILBOX_PROTO_VERSION. those aren't suggestions, bestie, that's the vibe check 💀

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and that's the page!! source path is ./include/linux/platform_data, dated October 2026, and yes the footer still says struct wilco_ec_response(9) because she's consistent like that ⭐💜