STRUCT AT91_ADC_DMA(9)

💖 struct at91_adc_dma(9) 💖 Kernel API Manual 💖

🌸 NAME 🌸

struct at91_adc_dma - at91-sama5d2 dma information struct

okay bestie, this is the struct that carries the at91-sama5d2 DMA information, and every single field is required reading. no skips, no cap. 🦋

✨ SYNOPSIS ✨

struct at91_adc_dma {
    struct dma_chan                 *dma_chan;
    u8 *rx_buf;
    dma_addr_t rx_dma_buf;
    phys_addr_t phys_addr;
    int buf_idx;
    int rx_buf_sz;
    int watermark;
    s64 dma_ts;
};

💅 Members 💅

member-by-member vibe check, and every one is iconic:

• dma_chan — the dma channel acquired. acquired, not borrowed, iykyk. 💅
• rx_buf — dma coherent allocated area. that's the buffer's allocated area, periodt. ✨
• rx_dma_buf — dma handler for the buffer. handler duties, slay. 🎀
• phys_addr — physical address of the ADC base register. physical is literally in the name. 🦋
• buf_idx — index inside the dma buffer where reading was last done. last-done index lore. 📍
• rx_buf_sz — size of buffer used by DMA operation. the size, the whole size, nothing but the size. 💖
• watermark — number of conversions to copy before DMA triggers irq. that's the exact trigger threshold, no guessing. 🔥
• dma_ts — hold the start timestamp of dma operation. timestamp bestie has entered the chat. ⏰

🔥 SEE ALSO 🔥

go peek at these, bestie — all the related struct and enum lore is right here:

• Kernel file ./drivers/iio/adc/at91-sama5d2_adc.c
• struct at91_adc_platform(9)
• struct at91_adc_temp_sensor_clb(9)
• enum at91_adc_ts_clb_idx(9)
• struct at91_adc_soc_info(9)
• struct at91_adc_touch(9)
• struct at91_adc_temp(9)

xoxo, your source/version bestie is ./drivers/iio/adc, and the date stamp is October 2026 — mwah 💋💖