qcom_write_reg_dma(9)

💅 qcom_write_reg_dma(9) — a Kernel API Manual moment

okay so bestie, welcome to the qcom_write_reg_dma page, straight out of the Kernel API Manual. this is the one that writes a given number of registers, and honestly? she's serving utility. let's get into it 🎀

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✨ NAME ✨

qcom_write_reg_dma — write a given number of registers. that's it, that's the whole vibe. 💖

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🦋 SYNOPSIS 🦋

int qcom_write_reg_dma (struct qcom_nand_controller *nandc , __le32
*vaddr , int first , int num_regs , unsigned int flags );

look at her. five params, returns an int, living her best life. no cap. ✨

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🌸 ARGUMENTS 🌸

• nandc — the qpic nand controller. your main character struct fr fr 💅
• vaddr — contiguous memory from where the register value will be written. like, the source of truth, the origin story 🫶
• first — offset of the first register in the contiguous block. she's the starting point, the beginning of the era ⭐
• num_regs — number of registers to write. how many we're taking with us on this journey 🔥
• flags — flags that control DMA descriptor preparation. the little knobs that decide how the descriptor gets prepped 🎀

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💜 DESCRIPTION 💜

so what does she actually do? this function prepares a descriptor to write a given number of contiguous registers. that's the whole thing — she's a preparer, a descriptor girlie, the one setting things up so the actual writing can happen. iconic behavior honestly 👑

not me being obsessed with a function whose entire job is prep work 😭 she's the幕后 queen and we respect her.

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🌈 SEE ALSO 🌈

bestie, the whole friend group is here, and yes they all showed up to the group chat 💖

• Kernel file ./drivers/mtd/nand/qpic_common.c — go read the source, iykyk 📖
• qcom_free_bam_transaction(9)
• qcom_alloc_bam_transaction(9)
• qcom_clear_bam_transaction(9)
• qcom_qpic_bam_dma_done(9)
• qcom_nandc_dev_to_mem(9)
• qcom_prepare_bam_async_desc(9)
• qcom_prep_bam_dma_desc_cmd(9)
• qcom_prep_bam_dma_desc_data(9)
• qcom_prep_adm_dma_desc(9)
• qcom_read_reg_dma(9)
• qcom_read_data_dma(9)
• qcom_write_data_dma(9)
• qcom_submit_descs(9)
• qcom_clear_read_regs(9)
• qcom_nandc_unalloc(9)
• qcom_nandc_alloc(9)

every single one of them, present and accounted for. slay. 🧚

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heads up bestie: this page lives under ./drivers/mtd/nand, and the version/date stamp on it is October 2026. so yeah, she's from the future (or at least the docs said so) 💀

and that's the page! qcom_write_reg_dma(9), ./drivers/mtd/nand, October 2026 — mwah, periodt 💅💖