/* 3. Initialize hardware */ sec_testbd_reset(testbd); sec_testbd_configure(testbd, DEFAULT_MODE);
# Verify device node ls -l /dev/sec_testbd # → crw-rw---- 1 root video 250, 0 Mar 23 12:34 /dev/sec_testbd Sec S3c2443x Test B D Driver
/* 4. Register char device */ ret = alloc_chrdev_region(&dev_num, 0, 1, "sec_testbd"); if (ret) return ret; cdev_init(&testbd->cdev, &sec_testbd_fops); testbd->cdev.owner = THIS_MODULE; ret = cdev_add(&testbd->cdev, dev_num, 1); if (ret) goto err_unregister; It is primarily used in embedded Linux environments
The Sec S3c2443x Test B D Driver is a reference implementation of a low‑level device driver for the Sec S3c2443x series of System‑on‑Chip (SoC) peripherals. It is primarily used in embedded Linux environments to validate the functionality of the “Test B D” hardware block, which provides a programmable interface for secure data handling, cryptographic acceleration, and DMA‑based I/O. if (ret) return ret
/* 2. Request IRQ */ ret = devm_request_irq(&pdev->dev, platform_get_irq(pdev, 0), sec_testbd_isr, 0, dev_name(&pdev->dev), testbd); if (ret) return ret;
struct resource *res; int ret;