STRUCT CROS_EC_SPI(9)

💅 struct cros_ec_spi(9) 💅

okay so this is a page from the Kernel API Manual, and honestly? it's giving "tiny struct, huge responsibilities." we're talking about struct cros_ec_spi — the whole vibe of it. 🦋

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✨ NAME ✨

struct cros_ec_spi — literally all the info about a SPI-connected EC. that's it, that's the struct. 🎀

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🌸 SYNOPSIS 🌸

struct cros_ec_spi {
    struct spi_device *spi;
    s64 last_transfer_ns;
    unsigned int start_of_msg_delay;
    unsigned int end_of_msg_delay;
    struct kthread_worker *high_pri_worker;
 };

look at her. five fields. absolutely iconic. no notes. 👑

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🫶 Members 🫶

bestie, let's go field by field, because every single one of these matters:

• spi — the SPI device we are connected to. like, the actual hardware bae. 🔌
• last_transfer_ns — the time that we last finished a transfer. yes, in nanoseconds. she keeps receipts. ⏱️
• start_of_msg_delay — this one's used to set the delay_usecs on the spi_transfer that gets sent when we want to turn on CS at the start of a transaction. CS goes on → delay gets set → slay. 💖
• end_of_msg_delay — same energy, opposite end: used to set the delay_usecs on the spi_transfer that is sent when we want to turn off CS at the end of a transaction. 🎬
• high_pri_worker — Used to schedule high priority work. main character energy only. this worker does NOT do side quests. 🔥

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🌈 SEE ALSO 🌈

go be nosy, i support it. check out:

• Kernel file ./drivers/platform/chrome/cros_ec_spi.c
• struct cros_ec_xfer_work_params(9)
• receive_n_bytes(9)
• cros_ec_spi_receive_packet(9)
• cros_ec_spi_receive_response(9)
• do_cros_ec_pkt_xfer_spi(9)
• do_cros_ec_cmd_xfer_spi(9)

like, read them. it's called ✨research✨. 💅

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ok real talk for one sec: everything above is exactly what the page says — i didn't add a single behavior, default, or caveat. don't come for me if your kernel does something else, i'm just the messenger angel 🧚

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and that's the page!! 🎀 this came out of ./drivers/platform/chrome, dated October 2026, and it's filed under struct cros_ec_spi(9) — so next time someone asks, you already know. mwah 💜