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s5pc1xx: update the README file
Because adds support the GPIO Interface, README file is updated. Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Showing 1 changed file with 17 additions and 1 deletions Inline Diff
doc/README.s5pc1xx
| 1 | 1 | ||
| 2 | Summary | 2 | Summary |
| 3 | ======= | 3 | ======= |
| 4 | 4 | ||
| 5 | This README is about U-Boot support for SAMSUNG's ARM Cortex-A8 based S5PC1xx | 5 | This README is about U-Boot support for SAMSUNG's ARM Cortex-A8 based S5PC1xx |
| 6 | family of SoCs (S5PC100 [1] and S5PC110). | 6 | family of SoCs (S5PC100 [1] and S5PC110). |
| 7 | 7 | ||
| 8 | Currently the following board is supported: | 8 | Currently the following board is supported: |
| 9 | 9 | ||
| 10 | * SMDKC100 [2] | 10 | * SMDKC100 [2] |
| 11 | 11 | ||
| 12 | Toolchain | 12 | Toolchain |
| 13 | ========= | 13 | ========= |
| 14 | 14 | ||
| 15 | While ARM Cortex-A8 support ARM v7 instruction set (-march=armv7a) we compile | 15 | While ARM Cortex-A8 support ARM v7 instruction set (-march=armv7a) we compile |
| 16 | with -march=armv5 to allow more compilers to work. For U-Boot code this has | 16 | with -march=armv5 to allow more compilers to work. For U-Boot code this has |
| 17 | no performance impact. | 17 | no performance impact. |
| 18 | 18 | ||
| 19 | Build | 19 | Build |
| 20 | ===== | 20 | ===== |
| 21 | 21 | ||
| 22 | * SMDKC100 | 22 | * SMDKC100 |
| 23 | 23 | ||
| 24 | make smdkc100_config | 24 | make smdkc100_config |
| 25 | make | 25 | make |
| 26 | 26 | ||
| 27 | 27 | ||
| 28 | Interfaces | 28 | Interfaces |
| 29 | ========== | 29 | ========== |
| 30 | 30 | ||
| 31 | cpu | 31 | cpu |
| 32 | 32 | ||
| 33 | To check SoC: | 33 | To check SoC: |
| 34 | 34 | ||
| 35 | if (cpu_is_s5pc100()) | 35 | if (cpu_is_s5pc100()) |
| 36 | printf("cpu is s5pc100\n"); | 36 | printf("cpu is s5pc100\n"); |
| 37 | 37 | ||
| 38 | or | 38 | or |
| 39 | 39 | ||
| 40 | if (cpu_is_s5pc110()) | 40 | if (cpu_is_s5pc110()) |
| 41 | printf("cpu is s5pc110\n"); | 41 | printf("cpu is s5pc110\n"); |
| 42 | 42 | ||
| 43 | gpio | 43 | gpio |
| 44 | not supported yet. | 44 | |
| 45 | struct s5pc100_gpio *gpio = (struct s5pc100_gpio*)S5PC100_GPIO_BASE; | ||
| 46 | |||
| 47 | /* GPA[0] pin set to irq */ | ||
| 48 | gpio_cfg_pin(&gpio->gpio_a, 0, GPIO_IRQ); | ||
| 49 | |||
| 50 | /* GPA[0] pin set to input */ | ||
| 51 | gpio_direction_input(&gpio->gpio_a, 0); | ||
| 52 | |||
| 53 | /* GPA[0] pin set to output/high */ | ||
| 54 | gpio_direction_output(&gpio->gpio_a, 0, 1); | ||
| 55 | |||
| 56 | /* GPA[0] value set to low */ | ||
| 57 | gpio_set_value(&gpio->gpio_a, 0, 0); | ||
| 58 | |||
| 59 | /* get GPA[0] value */ | ||
| 60 | value = gpio_get_value(&gpio->gpio_a, 0); | ||
| 45 | 61 | ||
| 46 | Links | 62 | Links |
| 47 | ===== | 63 | ===== |
| 48 | 64 | ||
| 49 | [1] S5PC100: | 65 | [1] S5PC100: |
| 50 | 66 | ||
| 51 | http://www.samsung.com/global/business/semiconductor/productInfo.do? | 67 | http://www.samsung.com/global/business/semiconductor/productInfo.do? |
| 52 | fmly_id=229&partnum=S5PC100 | 68 | fmly_id=229&partnum=S5PC100 |
| 53 | 69 | ||
| 54 | [2] SMDKC100: | 70 | [2] SMDKC100: |
| 55 | 71 | ||
| 56 | http://meritech.co.kr/eng/products/product_view.php?num=28 | 72 | http://meritech.co.kr/eng/products/product_view.php?num=28 |
| 57 | 73 |