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library:rk3568:lcddrv
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library:rk3568:lcddrv [2022/11/02 23:47] lhaosen [2.2 dts配置] |
library:rk3568:lcddrv [2022/11/02 23:55] (current) lhaosen [2. Linux驱动设计（A）] |
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| Line 47: | Line 47: | ||
| * spi: / | * spi: / | ||
| + | ==== - 控制IO ==== | ||
| + | === - dts === | ||
| + | < | ||
| + | lcd_reset: | ||
| + | label = " | ||
| + | linux, | ||
| + | default-state = " | ||
| + | gpios = <& | ||
| + | }; | ||
| + | |||
| + | lcd_backlight: | ||
| + | label = " | ||
| + | linux, | ||
| + | default-state = " | ||
| + | gpios = <& | ||
| + | }; | ||
| + | |||
| + | lcd_data: data { | ||
| + | label = " | ||
| + | linux, | ||
| + | default-state = " | ||
| + | gpios = <& | ||
| + | }; | ||
| + | </ | ||
| + | 添加以上3个pin的gpio-leds节点，驱动成功后的访问入口为： | ||
| + | / | ||
| + | / | ||
| + | / | ||
| + | | ||
| + | 可以用命令测试这几个pin的状态： | ||
| + | # backlight = 1 | ||
| + | echo 1 > / | ||
| + | # backlight = 0 | ||
| + | echo 1 > / | ||
| ==== - spidev配置 ==== | ==== - spidev配置 ==== | ||
| 修改DTS及添加驱动到内核 | 修改DTS及添加驱动到内核 | ||
| Line 75: | Line 109: | ||
| }; | }; | ||
| </ | </ | ||
| - | pinctrl-0/1 重写覆盖了原定义，cs脚使用 | + | * pinctrl-0/1 重写覆盖了原定义，cs脚使用 |
| + | * 停用冲突的管脚: | ||
| - | == disable uart8 == | ||
| - | uart8于spi0管脚冲突，使uart8无效 | ||
| - | &uart8 { | ||
| - | status = " | ||
| - | }; | ||
| - | | ||
| | | ||
| ==== - Demo script ==== | ==== - Demo script ==== | ||
library/rk3568/lcddrv.1667404029.txt.gz · Last modified: 2022/11/02 23:47 by lhaosen
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