ca8210_set_cca_ed_level(9)

📦 version 7.3.1, in nixpkgs unstable

💅 ca8210_set_cca_ed_level — the kernel API manual, bestie edition ✨

okay so real talk, this is ca8210_set_cca_ed_level(9) from the Kernel API Manual, and it's literally the function that sets the CCA ED level of the ca8210. that's it, that's the vibe 🎀

🌸 NAME 🌸

ca8210_set_cca_ed_level — sets the CCA ED level of the ca8210. no cap, that's the whole name section 💖

✨ SYNOPSIS ✨

int ca8210_set_cca_ed_level (struct ieee802154_hw *hw , s32 level );

look at her. iconic signature. returns an int, takes a struct ieee802154_hw * and an s32. chef's kiss 🫶

🦋 ARGUMENTS 🦋

  • hw — the ieee802154_hw of the target ca8210. like, which ca8210 are we talking to, bestie? this one 👈
  • level — the ED level to set, measured in mbm. that's milli-BM, keep that unit in your notes fr fr 📝

💅 DESCRIPTION 💅

so what does she do? she sets the minimum threshold of measured energy above which the ca8210 will back off and retry a transmission. the way that works is: energy goes above your threshold → the chip goes "nope, not today" and retries later. main character energy honestly 🔥

lowkey important: it's a minimum threshold of measured energy, and crossing it makes the ca8210 back off and retry a transmission. that's the whole deal, don't overthink it 💜

🌈 RETURN 🌈

0 or a linux error code. that's it. zero means slay, anything else means the kernel said no 😭

👑 SEE ALSO 👑

the kernel file lives at ./drivers/net/ieee802154/ca8210.c, and here's the full squad — every single one, no skipping, we don't do that here 🎀

okay and one last little sign-off, bestie: this page comes from ./drivers/net/ieee802154 and it's dated October 2026 💖 that's the tea, go set some thresholds 🧚🌸

📦 where this page comes from