atmel_smc_cs_conf_set_cycle(9)

📦 version 7.3.1, in nixpkgs unstable

💅 atmel_smc_cs_conf_set_cycle(9) — a Kernel API Manual moment

okay bestie, welcome to the Kernel API Manual for atmel_smc_cs_conf_set_cycle(9) — no cap, this is the little function that sets one (1) xx_CYCLE parameter inside your SMC CS conf to a specific value. she's small, she's focused, she ate. ✨

🎀 NAME 🎀

atmel_smc_cs_conf_set_cycle — set the SMC CS conf xx_CYCLE parameter to a specific value. that's it, that's the whole assignment, and she did it flawlessly. 💖

✨ SYNOPSIS ✨

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

🫶 ARGUMENTS 🫶

  • conf — the SMC CS conf descriptor. your main character struct, the one holding everything. 👑
  • shift — the position of the xx_CYCLE field in the CYCLE register. iykyk, it's the offset of where the field lives. 🎯
  • ncycles — the value you're assigning to this xx_CYCLE parameter, and bestie it's expressed in MCK clk cycles. clock cycles, not vibes. ⏱️

🦋 DESCRIPTION 🦋

so what she does is literal perfection: this function encodes the ncycles value exactly as described in the datasheet (section "SMC Cycle Register" — yes, go read it, it's giving reference material 🍓), and then stores the result in the conf->setup field at shift position. slay. 🎀

the way that return values work here, let's break it down:

  • returns -EINVAL if shift is invalid 🙈
  • returns -ERANGE if ncycles does not fit in the field 😭
  • and 0 otherwise 💖
ngl, that second one matters: if your ncycles is too chunky for the field, you get -ERANGE, not a silent truncation. respect the boundaries. 💅

🔥 SEE ALSO 🔥

Kernel file ./drivers/mfd/atmel-smc.c plus her whole friend group:

🌈 and that's the whole page, bestie — brought to you by ./drivers/mfd, dated October 2026, starring atmel_smc_cs_conf_set_cycle(9). go set those cycles, periodt. 💜🦋🌻

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