atmel_smc_cs...f_set_timing(9)

📦 version 7.3.1, in nixpkgs unstable

💅 atmel_smc_cs_conf_set_timing(9) — NAME

okay so bestie, welcome to the Kernel API Manual, section 9, and the star of today's episode is atmel_smc_cs_conf_set_timing 💖 (she's so iconic the page header literally had to abbreviate her to atmel_smc_cs...f_set_timing(9) — the ellipsis is giving main character energy, no cap).

What she does, in one breath: set the SMC CS conf Txx parameter to a specific value. That's it. That's the whole job. And she ate. 🔥

✨ SYNOPSIS ✨

int atmel_smc_cs_conf_set_timing (struct atmel_smc_cs_conf *conf ,
unsigned int shift , unsigned int ncycles );

literally the whole signature, copy-pasted with love, don't touch a character 🫶

🎀 ARGUMENTS 🎀

  • conf — the SMC CS conf descriptor 👑 like, the actual struct she's gonna poke at.
  • shift — the position of the Txx field inside the TIMINGS register. think of it as "which drawer do I put this in" 🗄️
  • ncycles — the value you wanna assign to this Txx parameter, expressed in MCK clk cycles ⏱️ (yes, cycles. she counts in clock ticks, she's built different.)

🌸 DESCRIPTION 🌸

so here's the tea ☕ — this function takes your ncycles value and encodes it exactly the way the datasheet says to (specifically the section called "SMC Timings Register", go read it, iykyk 📖). then it stores that encoded result in the conf->timings field, right at the shift position. iconic behavior. 🦋

And because she's a responsible queen, she tells you when things go sideways:

  • returns -EINVAL if shift is invalid 🙈 (like, that drawer doesn't exist bestie)
  • returns -ERANGE if ncycles doesn't fit in the field 😭 (too big for the box, it happens)
  • returns 0 otherwise 💜 (slay, we love a happy ending)
no cap, those return values are the whole vibe check — check them or you'll be debugging at 2am fr fr 💀

⭐ SEE ALSO ⭐

Kernel file ./drivers/mfd/atmel-smc.c — the mothership 🏠 and her whole friend group:

and that's the page!! 🎀✨ brought to you by ./drivers/mfd, dated October 2026 — mwah, go set some timings, you got this 🫶💖🌈

📦 where this page comes from