Summary ======= This README is about U-Boot support for SAMSUNG's ARM Cortex-A8 based S5PC1xx family of SoCs (S5PC100 [1] and S5PC110). Currently the following board is supported: * SMDKC100 [2] Toolchain ========= While ARM Cortex-A8 support ARM v7 instruction set (-march=armv7a) we compile with -march=armv5 to allow more compilers to work. For U-Boot code this has no performance impact. Build ===== * SMDKC100 make smdkc100_config make Interfaces ========== cpu To check SoC: if (cpu_is_s5pc100()) printf("cpu is s5pc100\n"); or if (cpu_is_s5pc110()) printf("cpu is s5pc110\n"); gpio struct s5pc100_gpio *gpio = (struct s5pc100_gpio*)S5PC100_GPIO_BASE; /* GPA[0] pin set to irq */ gpio_cfg_pin(&gpio->gpio_a, 0, GPIO_IRQ); /* GPA[0] pin set to input */ gpio_direction_input(&gpio->gpio_a, 0); /* GPA[0] pin set to output/high */ gpio_direction_output(&gpio->gpio_a, 0, 1); /* GPA[0] value set to low */ gpio_set_value(&gpio->gpio_a, 0, 0); /* get GPA[0] value */ value = gpio_get_value(&gpio->gpio_a, 0); Links ===== [1] S5PC100: http://www.samsung.com/global/business/semiconductor/productInfo.do? fmly_id=229&partnum=S5PC100 [2] SMDKC100: http://meritech.co.kr/eng/products/product_view.php?num=28