cros_ec_cmd(9)

🌸 NAME 🌸

okay bestie, welcome to the Kernel API Manual page for cros_ec_cmd(9) — it's giving tiny kernel helper, huge main character energy ✨ and no cap, it's useful.

cros_ec_cmd — Send a command to the EC. 💅

✨ SYNOPSIS ✨

this is the exact function signature, so copy it like your life depends on it:

       int cros_ec_cmd (struct cros_ec_device *ec_dev , unsigned int version ,
       int command , const void *outdata , size_t outsize , void *indata ,
       size_t insize );

🎀 ARGUMENTS 🎀

• ec_dev — the EC device, your little hardware bestie 🫶
• version — EC command version, iykyk
• command — EC command, the command itself 💌
• outdata — EC command output data, literally what the page says 📤
• outsize — the size of outdata, iconic
• indata — EC command input data 📥
• insize — the size of indata, periodt

💖 RETURN 💖

• >= 0 on success — slay, it worked ✨
• negative error number on failure — not the vibe check you wanted 😭

🦋 SEE ALSO 🦋

the kernel file is ./drivers/platform/chrome/cros_ec_proto.c, and here's the whole friend group:

• cros_ec_prepare_tx(9)
• cros_ec_check_result(9)
• cros_ec_get_host_event_wake_mask(9)
• cros_ec_get_host_command_version_mask(9)
• cros_ec_query_all(9)
• cros_ec_cmd_xfer(9)
• cros_ec_cmd_xfer_status(9)
• cros_ec_get_next_event(9)
• cros_ec_get_host_event(9)
• cros_ec_read_features(9)
• cros_ec_check_features(9)
• cros_ec_get_sensor_count(9)
• cros_ec_cmd_readmem(9)
• cros_ec_get_cmd_versions(9)
• cros_ec_device_registered(9)

mwah 💋 this cutie comes from the source/version ./drivers/platform/chrome, dated October 2026, and yes, it's still the cros_ec_cmd(9) manual page. bye bestie 🫶