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abbe18c353
Because adds support the GPIO Interface, README file is updated. Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
73 lines
1.2 KiB
Plaintext
73 lines
1.2 KiB
Plaintext
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Summary
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=======
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This README is about U-Boot support for SAMSUNG's ARM Cortex-A8 based S5PC1xx
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family of SoCs (S5PC100 [1] and S5PC110).
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Currently the following board is supported:
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* SMDKC100 [2]
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Toolchain
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=========
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While ARM Cortex-A8 support ARM v7 instruction set (-march=armv7a) we compile
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with -march=armv5 to allow more compilers to work. For U-Boot code this has
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no performance impact.
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Build
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=====
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* SMDKC100
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make smdkc100_config
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make
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Interfaces
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==========
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cpu
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To check SoC:
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if (cpu_is_s5pc100())
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printf("cpu is s5pc100\n");
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or
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if (cpu_is_s5pc110())
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printf("cpu is s5pc110\n");
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gpio
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struct s5pc100_gpio *gpio = (struct s5pc100_gpio*)S5PC100_GPIO_BASE;
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/* GPA[0] pin set to irq */
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gpio_cfg_pin(&gpio->gpio_a, 0, GPIO_IRQ);
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/* GPA[0] pin set to input */
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gpio_direction_input(&gpio->gpio_a, 0);
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/* GPA[0] pin set to output/high */
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gpio_direction_output(&gpio->gpio_a, 0, 1);
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/* GPA[0] value set to low */
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gpio_set_value(&gpio->gpio_a, 0, 0);
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/* get GPA[0] value */
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value = gpio_get_value(&gpio->gpio_a, 0);
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Links
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=====
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[1] S5PC100:
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http://www.samsung.com/global/business/semiconductor/productInfo.do?
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fmly_id=229&partnum=S5PC100
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[2] SMDKC100:
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http://meritech.co.kr/eng/products/product_view.php?num=28
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