STRUCT EC_HOST_RESPONSE(9)

👑 struct ec_host_response(9) — the Kernel API Manual glow-up ✨

okay bestie, so this is the page for struct ec_host_response in the Kernel API Manual, and it's literally the Version 3 response that comes back from the EC. she's the reply-text of the embedded controller world and we're gonna read her top to bottom 💅

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🌸 NAME 🌸

struct ec_host_response — Version 3 response from EC. that's it, that's the whole vibe 🎀

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✨ SYNOPSIS ✨

here's the whole struct, exactly as she ships, no cap:

struct ec_host_response {
    uint8_t struct_version;
    uint8_t checksum;
    uint16_t result;
    uint16_t data_len;
    uint16_t reserved;
 };

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🦋 DESCRIPTION 🦋

this is the header that rides in front of the actual response data — she announces herself, tells you how long the payload is, and then the data follows her. every member gets its own little moment below 👇

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💖 MEMBERS 💖

• struct_version — the struct version, and she's a 3. iconic, consistent, no notes 👑
• checksum — the checksum of the response and the data. here's the tea: the sum of all the bytes, including the checksum byte itself, should total to 0. so if it doesn't add up to zero, something's sus and the vibe check failed 😭
• result — the EC's actual response to the command. super important distinction, bestie: this is separate from a communication failure, so a sad result is not the same thing as the transport going sideways 💀
• data_len — the length of the data that follows this header. so she's telling you how much more to read 🍓
• reserved — unused bytes in the current protocol version. set it to 0 and move on, fr fr 🙈

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🌈 SEE ALSO 🌈

the whole extended friend group, all from the kernel file ./include/linux/platform_data/cros_ec_commands.h 💜

• struct ec_lpc_host_args(9)
• struct ec_host_request(9)
• struct ec_response_proto_version(9)
• struct ec_params_hello(9)
• struct ec_response_hello(9)
• struct ec_response_get_version(9)
• struct ec_params_read_test(9)
• struct ec_response_read_test(9)
• struct ec_response_get_chip_info(9)
• struct ec_response_board_version(9)
• struct ec_params_read_memmap(9)
• struct ec_params_get_cmd_versions(9)
• struct ec_params_get_cmd_versions_v1(9)
• struct ec_response_get_cmd_versions(9)
• struct ec_response_get_comms_status(9)
• struct ec_response_get_protocol_info(9)
• struct ec_response_flash_info(9)
• struct ec_response_flash_info_1(9)
• struct ec_params_flash_read(9)
• struct ec_params_flash_write(9)
• struct ec_params_flash_erase(9)
• struct ec_params_flash_erase_v1(9)
• struct ec_params_flash_protect(9)
• struct ec_response_flash_protect(9)
• struct ec_params_flash_region_info(9)
• struct ec_params_flash_select(9)
• struct ec_params_cec_write(9)
• struct ec_params_cec_write_v1(9)
• struct ec_params_cec_read(9)
• struct ec_response_cec_read(9)
• struct ec_params_cec_set(9)
• struct ec_params_cec_get(9)
• struct ec_response_cec_get(9)
• struct ec_response_cec_port_count(9)
• struct ec_params_battery_static_info(9)
• struct ec_response_battery_static_info(9)
• struct ec_params_battery_dynamic_info(9)
• struct ec_response_battery_dynamic_info(9)
• struct ec_params_charger_control(9)

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ok that's the whole page bestie, nothing skipped, every single struct accounted for 🫶 go read your EC responses responsibly 💖

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signed, sealed, delivered from ./include/linux/platform_data 💌 — dated October 2026, page struct ec_host_response(9), Kernel API Manual, mwah 😘