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Linux 2.6ÏÂSPIÉ豸ģÐÍ
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       Atmel¹«Ë¾µÄARM ATϵÁУ¬ÆäSPIÇý¶¯ÔÚkernel 2.6.23ÀïÒѾ­°üº¬¡£Èç¹ûÄã´òÁËat91-patch²¹¶¡µÄ»°£¬ÔòÔÚÄÚºËÅäÖÃʱҪСÐÄ¡£ÔÚDevice Drivers---- > Character devices ---- >È¡ÏûÑ¡ÖÐSPI Driver(legacy) for at91rm9200 processor ¡£Í¬Ê±Device Drivers---- >SPI Support ---- > Ñ¡ÖÐSPI Support ,Atmel SPI Controler,ͬʱѡÖÐ User mode SPI device driver support ¡£
SPI Driver(legacy) for at91rm9200 processorÊDZ£ÁôÑ¡ÏΪÁ˼æÈÝÒÔǰ°æ±¾¡£Èç¹ûͬʱѡÖÐSPI Driver(legacy) for at91rm9200 processor£¬ÔòÔÚ/sysÀïÎÞ·¨×¢²áÀàspidev£¬Ò²¾ÍÎÞ·¨½«É豸ºÍÇý¶¯ÁªÏµÔÚÒ»Æð¡£ÓëÏÖÓÐatmel spiÇý¶¯·¢Éú³åÍ»¡£
 
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       [*]SPI support ---- Config_SPI  ¿ªÆôSPI¹¦ÄÜ
       [*]Debug support for SPI drivers ---- config SPI_DEBUG   ¿ªÆôSPI debugµ÷ÊÔ
       ----SPI Master Controller Drivers ---- depends on SPI_MASTER  Éú³Éspi.o
       <*>Atmel SPI Controller ---- config SPI_ATMEL Éú³Éatmel_spi.o
       <*>Bitbanging SPI master ---- config SPI_BITBANG Éú³Éspi_bitbang.o
       <*>AT91RM9200 Bitbang SPI Master  ---- CONFIG_SPI_AT91  spi_at91_bitbang.o
       ---- SPI Protocol Masters ---- depends on SPI_MASTER
      < >SPI EEPROMs from most vendors ---- config SPI_AT25 Éú³Éat25.o
       <*>User mode SPI device driver support ---- config SPI_SPIDEV Éú³Éspidev.o
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#spi.c
       struct bus_type spi_bus_type = {
       .name             = "spi",   // spi×ÜÏßÃû³Æ
       .dev_attrs   


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