请写一段软件spi驱动dt7735s的驱动程序
时间: 2023-09-30 09:10:37 浏览: 121
stm32f103c8t6软件spi驱动st7735s屏幕
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以下是基于Linux系统的DT7735S SPI驱动程序:
```c
#include <linux/module.h>
#include <linux/init.h>
#include <linux/spi/spi.h>
static struct spi_device *dt7735s_spi_device;
static int dt7735s_spi_probe(struct spi_device *spi)
{
// 检查设备是否是DT7735S
if(strcmp(spi->modalias, "dt7735s") != 0)
return -EINVAL;
// 记录SPI设备指针
dt7735s_spi_device = spi;
// 初始化DT7735S
return 0;
}
static int dt7735s_spi_remove(struct spi_device *spi)
{
// 关闭DT7735S
return 0;
}
static const struct of_device_id dt7735s_of_match[] = {
{ .compatible = "dt7735s", },
{},
};
MODULE_DEVICE_TABLE(of, dt7735s_of_match);
static struct spi_driver dt7735s_spi_driver = {
.driver = {
.name = "dt7735s",
.owner = THIS_MODULE,
.of_match_table = dt7735s_of_match,
},
.probe = dt7735s_spi_probe,
.remove = dt7735s_spi_remove,
};
module_spi_driver(dt7735s_spi_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Your Name");
MODULE_DESCRIPTION("DT7735S SPI Driver");
```
其中,需要自行实现初始化DT7735S和关闭DT7735S的函数。同时需要在设备树中添加对应的节点,如:
```dts
&spi0 {
dt7735s@0 {
compatible = "dt7735s";
reg = <0>;
spi-max-frequency = <10000000>;
};
};
```
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