omap3_set_off_timings(9)

💖 omap3_set_off_timings(9) 💖

okay so bestie, welcome to the Kernel API Manual bestie edition — today's main character is omap3_set_off_timings, and she is literally the girl who handles the off-mode timings for a channel. no cap.

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🌸 NAME 🌸

omap3_set_off_timings — sets off-mode timings for a channel ✨

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🦋 SYNOPSIS 🦋

void omap3_set_off_timings (struct voltagedomain *voltdm );

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🎀 ARGUMENTS 🎀

• voltdm — the channel to configure. that's it, that's the whole argument, she's lowkey low maintenance 💅

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👑 DESCRIPTION 👑

so here's the vibe: this function calculates and sets up off-mode timings for a channel. it's giving "i do the math so you don't have to" 🧮✨

now, off-mode has two whole aesthetics for voltage scaling, and you gotta pick your fighter:

• I2C based voltage scaling — the classic route 🫶
• the sys_off_mode pad — used to send a global command to power IC.n, and this one comes with a glow-up bonus: with TWL4030 / TWL5030, voltages can be scaled all the way down to zero volt level. meanwhile I2C can only scale to 600mV. like, cute, but not zero 🥲

no cap, that's a real difference — zero volts vs. 600mV is not a vibe check you wanna fail 🔥

also super important bestie: omap is not controlling the voltage scaling during off idle signaled by sys_off_mode, so we can keep voltsetup1 as 0. periodt. 💀

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🌈 SEE ALSO 🌈

Kernel file ./arch/arm/mach-omap2/vc.c, plus the whole friend group 💖

• struct omap_vc_channel_cfg(9)
• omap_vc_config_channel(9)
• omap3_set_i2c_timings(9)
• omap4_calc_volt_ramp(9)
• omap4_usec_to_val_scrm(9)
• omap4_set_timings(9)
• omap4_vc_i2c_timing_init(9)
• omap_vc_i2c_init(9)
• omap_vc_calc_vsel(9)

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okay that's the whole page, ily, go configure a channel 💜✨

— brought to you by ./arch/arm/mach-omap2, October 2026, Kernel API Manual. mwah 🫶🎀⭐