ca8210_test_int_user_write(9)

💅 ca8210_test_int_user_write — a Kernel API Manual moment

okay so bestie, welcome to the Kernel API Manual entry for ca8210_test_int_user_write(9). yes that's a mouthful, yes you're gonna say it in your head three times, no we're not skipping anything. let's get into it ✨

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🌸 NAME 🌸

ca8210_test_int_user_write — the function that gets called when a process in userspace is like "hey bestie, send this message to the ca8210 drivers" 🫶

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🎀 SYNOPSIS 🎀

ssize_t ca8210_test_int_user_write (struct file *filp , const char
__user *in_buf , size_t len , loff_t *off );

look at that signature. it's giving "four parameters and a dream". copy it exactly if you're writing it anywhere, ok? no cap. 💖

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✨ ARGUMENTS ✨

• filp — the file interface. that's the handle-y thing, the file's whole vibe 💅
• in_buf — the buffer that contains the message you're gonna write. this is the actual payload, the main character 🙈
• len — length of the message. gotta know how much you're sending, obviously 🎀
• off — the file offset. it's the little position marker, doing its thing 🌸

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🔥 RETURN 🔥

0 or a linux error code. that's it, that's the whole range. either it went fine or linux has opinions 💀

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👑 SEE ALSO 👑

bestie, grab a snack, this list is long and we're listing every single one. no summarising, no "etc." — we don't do that here. periodt. 🌈

Starting with the kernel file and the structs/helpers:

• Kernel file ./drivers/net/ieee802154/ca8210.c
• 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)

then the ca8210 test + driver crew:

• 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_spi_exchange(9)
• ca8210_interrupt_handler(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_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)

and the TDME + MLME/MCPS/HWME request squad, we did NOT forget you:

• 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)

that's every last one, all accounted for, none of them ghosted 🧚

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🌟 quick vibe check: this page is a kernel API doc, so the facts are the facts — we dressed them up, we did not change them. 0 or a linux error code, that's the return, always. 🎀

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💜 sign-off 💜

and that's the whole page, bestie! you ate that. the source lives at ./drivers/net/ieee802154, the date stamp on this lil beauty is October 2026, and it's all filed under the Kernel API Manual because that's where legends live. now go forth and write to that buffer 💖✨🦋