ca8210_spi_exchange(9)

💅 ca8210_spi_exchange(9) ✨

okay so you're reading the Kernel API Manual entry for ca8210_spi_exchange, and honestly? iconic of you. this is the little function that talks to the radio, and we're gonna walk through it together 💖

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🌸 NAME 🌸

ca8210_spi_exchange — Exchange API/SAP commands with the radio 🎀

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⭐ SYNOPSIS ⭐

int ca8210_spi_exchange (const u8 *buf , size_t len , u8 *response ,
       void *device_ref );

that's it. that's the whole signature. no cap, she's compact 💅

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🦋 ARGUMENTS 🦋

• buf — Octet array of command being sent downstream. like, this is the actual message you're yeeting out to the radio, byte by byte 🫶
• len — length of buf. yes bestie, you gotta know how big your own array is, that's the whole vibe check 📏
• response — buffer for storing synchronous response. the radio's lil reply gets parked right here 💌
• device_ref — spi_device pointer for ca8210. it's the ID that tells everyone which spi device we're talking to, no confusion allowed 🔥

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✨ DESCRIPTION ✨

So here's what actually goes down: this function effectively calls ca8210_spi_transfer to write buf[] to the spi. then — and this is the main character moment — for synchronous commands, it waits for the corresponding response to be read from the spi before it returns 😳 like she's not leaving until she gets her answer, periodt.

The response is written to the response parameter. so yeah, that buffer you passed in? it does the thing 🎀

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💜 RETURN 💜

0 or linux error code. that's it, that's the range 😭 (so like... check it, bestie, fr fr)

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🌈 SEE ALSO 🌈

the kernel file lives at ./drivers/net/ieee802154/ca8210.c, and here's the whole extended friend group — every single one of them, in order, no one left out 🫶

• struct cas_control(9)
• struct ca8210_test(9)
• struct ca8210_priv(9)
• struct work_priv_container(9)
• struct ca8210_platform_data(9)
• struct fulladdr(9)
• union macaddr(9)
• struct secspec(9)
• link_to_linux_err(9)
• ca8210_test_int_driver_write(9)
• ca8210_reset_send(9)
• ca8210_mlme_reset_worker(9)
• ca8210_rx_done(9)
• ca8210_spi_transfer_complete(9)
• ca8210_spi_transfer(9)
• ca8210_interrupt_handler(9)
• tdme_setsfr_request_sync(9)
• tdme_chipinit(9)
• tdme_channelinit(9)
• tdme_checkpibattribute(9)
• tdme_settxpower(9)
• mcps_data_request(9)
• mlme_reset_request_sync(9)
• mlme_set_request_sync(9)
• hwme_set_request_sync(9)
• hwme_get_request_sync(9)
• ca8210_async_xmit_complete(9)
• ca8210_skb_rx(9)
• ca8210_net_rx(9)
• ca8210_skb_tx(9)
• ca8210_start(9)
• ca8210_stop(9)
• ca8210_xmit_async(9)
• ca8210_get_ed(9)
• ca8210_set_channel(9)
• ca8210_set_hw_addr_filt(9)
• ca8210_set_tx_power(9)
• ca8210_set_cca_mode(9)
• ca8210_set_cca_ed_level(9)
• ca8210_set_csma_params(9)
• ca8210_set_frame_retries(9)
• ca8210_test_int_open(9)
• ca8210_test_check_upstream(9)
• ca8210_test_int_user_write(9)
• ca8210_test_int_user_read(9)
• ca8210_test_int_ioctl(9)
• ca8210_test_int_poll(9)
• ca8210_get_platform_data(9)
• ca8210_config_extern_clk(9)
• ca8210_register_ext_clock(9)
• ca8210_unregister_ext_clock(9)
• ca8210_reset_init(9)
• ca8210_interrupt_init(9)
• ca8210_dev_com_init(9)
• ca8210_dev_com_clear(9)
• ca8210_hw_setup(9)
• ca8210_test_interface_init(9)
• ca8210_test_interface_clear(9)
• ca8210_remove(9)
• ca8210_probe(9)

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lowkey a whole friend group in that SEE ALSO, and every single one of them is a (9) section entry. we love a consistent manpage section 💅

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okay that's the whole page, bestie!! go forth and exchange your API/SAP commands with the radio, you absolute icon 🌟

signing off from ./drivers/net/ieee802154, dated October 2026 🎀 — this was ca8210_spi_exchange(9), and she ate 💖