S3C2440 SPI驅動代碼詳細解讀：

https://www.linuxidc.com/Linux/2012-08/68402p4.htm

一、platform device and board_info

/*?/arch/arm/plat-s3c24xx*/
static?struct?resource s3c_spi0_resource[] =?{
[0] = {.start = S3C24XX_PA_SPI,.end = S3C24XX_PA_SPI + 0x1f,.flags = IORESOURCE_MEM,},[1] = {.start = IRQ_SPI0,.end = IRQ_SPI0,.flags = IORESOURCE_IRQ,}}; static u64 s3c_device_spi0_dmamask = 0xffffffffUL; struct platform_device s3c_device_spi0 = {.name = "s3c2410-spi",　　　　　　/* 匹配platform_device 的.driver.namen */.id = 0,.num_resources = ARRAY_SIZE(s3c_spi0_resource),.resource = s3c_spi0_resource,.dev = {.dma_mask = &s3c_device_spi0_dmamask,.coherent_dma_mask = 0xffffffffUL} }; EXPORT_SYMBOL(s3c_device_spi0);/* /arch/arm/mach-s3c2440/mach-tq2440.c */ static struct spi_board_info s3c2440_spi0_board[] = {[0] = {.modalias = "spidev",.bus_num = 0,.chip_select = 0,.irq = IRQ_SPI0, //IRQ_EINT10,/* 修改無效 */.max_speed_hz = 10*1000*1000,}, };static struct s3c2410_spi_info s3c2440_spi0_platdata = {.pin_cs = S3C2410_GPG2,.num_cs = 1,.bus_num = 0, };static struct platform_device *tq2440_devices[] __initdata = {......&s3c_device_spi0, /* sunhj add for spi0 */&s3c_device_spi1, }; static void __init tq2440_machine_init(void) {
　　platform_add_devices(tq2440_devices, ARRAY_SIZE(tq2440_devices));
　　/* sunhj add for spi */s3c_device_spi0.dev.platform_data= &s3c2440_spi0_platdata;spi_register_board_info(s3c2440_spi0_board, ARRAY_SIZE(s3c2440_spi0_board)); }

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二、Platform driver

/* /driver/spi/spi_s3c24xx.c */

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轉載于:https://www.cnblogs.com/FarmPick/p/8547758.html

總結

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