int spi_register_driver(struct spi_driversdrv) 函数参数和返回值含义如下: sdrv:要注册的 spi_driver。 返回值:0,注册成功;赋值,注册失败。 注销SPI 设备驱动以后也需要注销掉前面注册的 spi_driver,使用 spi_unregister_driver 函数完成 spi_driver 的注销,函数原型如下: void spi_unregister_driver(struct spi...
if (IS_ERR(spidev_class)) { unregister_chrdev(SPIDEV_MAJOR, spidev_spi_driver.driver.name); return PTR_ERR(spidev_class); } //注册spi设备驱动spidev_spi_driver if (status < 0) { class_destroy(spidev_class); unregister_chrdev(SPIDEV_MAJOR, spidev_spi_driver.driver.name); } return ...
This selects a driverforRockchip SPI controller. If you say yes to this option, support will be includedfor RK3066, RK3188 and RK3288 families of SPI controller. Rockchip SPI controller support DMA transport and PIO mode. The main usecase of this controller is to use spi flash as boot ...
spi_driver //SPI驱动,和platform_driver,i2c_driver类似structspi_driver{conststructspi_device_id*id_table;int(*probe)(structspi_device *spi);int(*remove)(structspi_device *spi);void(*shutdown)(structspi_device *spi);int(*suspend)(structspi_device *spi,pm_message_tmesg);int(*resume)(struc...
SPI NOR FLASH驱动
在driver_spi.c文件中定义了使用轮训方式发送接受一个字节数据函数driver_spi_master_transmit_receive_byte：上面函数中有带超时功能的等待SPI状态的函数driver_spi_flag_wait_timeout，该函数定义在driver_spi.c：11.4.3 SPI NOR FLASH 接口bsp层函数 操作NOR FLASH的函数都定义在bsp层文件bsp_spi_nor.c中，...
if((timeout+SPI_TIMEOUT_MS) <= driver_tick) { return DRV_ERROR; } } return DRV_SUCCESS; } 11.4.3SPI NOR FLASH 接口bsp层函数 操作NOR FLASH的函数都定义在bsp层文件bsp_spi_nor.c中,这个文件中定义的函数都是针对NOR FLASH特性来实现的,我们选取几个函数进行介绍。
在driver_spi.c文件中定义了SPI初始化函数driver_spi_init: C void driver_spi_init(typdef_spi_struct *spix) { spi_parameter_struct spi_init_struct; rcu_periph_clock_enable(spix->rcu_spi_x); /* spi configure */ spi_i2s_deinit(spix->spi_x); ...
在driver_spi.c文件中定义了SPI初始化函数driver_spi_init: C void driver_spi_init(typdef_spi_struct *spix) { spi_parameter_struct spi_init_struct; rcu_periph_clock_enable(spix->rcu_spi_x); /* spi configure */ spi_i2s_deinit(spix->spi_x); ...
SPINORFLASHdriver, 在kernel启动阶段加载(在运行initramfs的init之前加载) 以下对代码的debug打印的注释是基于使用美光M25Q128(MT25QQLHSL128ABA)SPINORFLASH芯片 lfs_linux\drivers\mtd\devices\m25p80.c: /*MTDSPIdriverfor STM25Pxx (and 十八、Nand Flash驱动和Nor Flash驱动 ...