-vis On S3c2410x Delta Driver - -
MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("vis Delta-Sigma Driver for S3C2410X"); The -vis Delta driver for the S3C2410X represents a classic embedded systems challenge: bridging a high-resolution, low-speed Delta-Sigma peripheral to a resource-constrained ARM9 processor while maintaining real-time video synchronization. While the original driver stacks are brittle and heavily tied to kernel 2.6, the principles of bitstream capture, decimation filtering, and DMA offload remain valid today.
return IRQ_HANDLED; The -vis part of the name suggests that the collected Delta data (likely touch coordinates or ambient light sensor for display adjustment) must be merged with the video output or capture. -vis On S3c2410x Delta Driver -
if (bit_count >= OSR) vis->delta_sigma_samples[current_index++] = accum / OSR; if (current_index >= BUFFER_SIZE) wake_up_interruptible(&vis->wait); accum = 0; bit_count = 0; MODULE_DESCRIPTION("vis Delta-Sigma Driver for S3C2410X")