pcmcia_fixup_vpp(9)

💅 pcmcia_fixup_vpp — the kernel API manual, bestie edition

okay so you're deep in the kernel, you're poking at a PCMCIA device, and you need to change the Vpp voltage mid-flight between enabling and disabling the thing. yeah. that's this function. it's giving "power management but make it a little guy". ✨

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🌸 NAME 🌸

pcmcia_fixup_vpp — sets Vpp to a brand new voltage level, no cap 💖

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🎀 SYNOPSIS 🎀

int pcmcia_fixup_vpp (struct pcmcia_device *p_dev , unsigned char
new_vpp );

like literally that's the whole signature. two args, one int back. iconic.

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🦋 ARGUMENTS 🦋

• p_dev — the pcmcia device in question, your main character 🫶
• new_vpp — the new Vpp voltage you wanna slide in there, unsigned char style

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⭐ DESCRIPTION ⭐

so here's the tea: pcmcia_fixup_vpp is the little helper that lets a PCMCIA device driver set Vpp to a new voltage level between calls to pcmcia_enable_device and pcmcia_disable_device. that's the window, bestie. that's the vibe check. you're in there, the device is enabled, and you're just adjusting the Vpp — no full teardown needed. 🔥

don't try to do it outside that window, okay? the description is very clear that it's between those two calls. periodt.

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💜 SEE ALSO 💜

• kernel file ./drivers/pcmcia/pcmcia_resource.c — the source, go look at it iykyk
• release_io_space(9)
• alloc_io_space(9)
• pcmcia_map_mem_page(9)
• pcmcia_fixup_iowidth(9)
• pcmcia_release_configuration(9)
• pcmcia_release_io(9)
• pcmcia_release_window(9)
• pcmcia_enable_device(9)
• pcmcia_request_io(9)
• pcmcia_request_irq(9)
• pcmcia_setup_isa_irq(9)
• pcmcia_setup_irq(9)
• pcmcia_request_window(9)
• pcmcia_disable_device(9)

the whole pcmcia friend group, honestly. read them all, they're a saga. 📚

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alright that's the whole page bestie, mwah 💋 — this one lives in ./drivers/pcmcia, dated October 2026, and it's the pcmcia_fixup_vpp(9) page from the Kernel API Manual. go forth and set that Vpp 🌈