一、驱动程序结构

1、platform_device

文件：/arch/arm/mach-omap2/device.c

 

static struct omap2_mcspi_platform_config omap2_mcspi1_config = {    .num_cs        = 4,};static struct resource omap2_mcspi1_resources[] = {    {        .start        = OMAP2_MCSPI1_BASE,        .end        = OMAP2_MCSPI1_BASE + 0xff,        .flags        = IORESOURCE_MEM,    },};static struct platform_device omap2_mcspi1 = {    .name        = "omap2_mcspi",    .id        = 1,                              /* 用于platform_driver probe函数中识别不同的设备 */        .num_resources    = ARRAY_SIZE(omap2_mcspi1_resources),    .resource    = omap2_mcspi1_resources,    .dev        = {    　　.platform_data = &omap2_mcspi1_config,        },}; static inline void ti81xx_mcspi_fixup(void){　　omap2_mcspi1_resources[0].start    = TI81XX_MCSPI1_BASE;　　omap2_mcspi1_resources[0].end    = TI81XX_MCSPI1_BASE + 0xff;}static void omap_init_mcspi(void){　　if (cpu_is_ti81xx())　　　　ti81xx_mcspi_fixup()    platform_device_register(&omap2_mcspi1);}

 

 

 

2、dev_devices

文件：/arch/arm/mach-omap2/board-ti8148ipnc.c

 

static struct spi_board_info dm8127_spi1_board[] = {        [0] = {                 .modalias = "spidev",                .bus_num        = 1,                .chip_select        = 0,                .irq = -1,                .max_speed_hz         = 20*1000*1000,                .mode = SPI_MODE_0,        },};void __init ti8148_spi_init(void){    spi_register_board_info(dm8127_spi1_board,                ARRAY_SIZE(dm8127_spi1_board));    }int __init spi_register_board_info(struct spi_board_info const *info, unsigned n){    struct boardinfo *bi;    int i;    bi = kzalloc(n * sizeof(*bi), GFP_KERNEL);    if (!bi)        return -ENOMEM;    for (i = 0; i < n; i++, bi++, info++) {        struct spi_master *master;        memcpy(&bi->board_info, info, sizeof(*info));        mutex_lock(&board_lock);        list_add_tail(&bi->list, &board_list);   /*加入board_list全局链表*/　　        　　　　  list_for_each_entry(master, &spi_master_list, list)            spi_match_master_to_boardinfo(master, &bi->board_info);        mutex_unlock(&board_lock);    }    return 0;}

 

 

 

 

1、platform_driver

文件：/driver/spi/omap2_mcspi.c

static const struct dev_pm_ops omap2_mcspi_pm_ops = {    .resume = omap2_mcspi_resume,};static struct platform_driver omap2_mcspi_driver = {    .driver = {        .name =        "omap2_mcspi",        .owner =    THIS_MODULE,        .pm =        &omap2_mcspi_pm_ops    },    .remove =    __exit_p(omap2_mcspi_remove),};static int __init omap2_mcspi_init(void){    omap2_mcspi_wq = create_singlethread_workqueue(    /* 创建工作队列 */    omap2_mcspi_driver.driver.name);    if (omap2_mcspi_wq == NULL)    return -1;    return platform_driver_probe(&omap2_mcspi_driver, omap2_mcspi_probe);}

 1、dev_driver

文件：/driver/spi/spidev.c

static struct spi_driver spidev_spi_driver = {    .driver = {        .name =        "spidev",        .owner =    THIS_MODULE,    },    .probe =    spidev_probe,    .remove =    __devexit_p(spidev_remove),};