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Linux Platform Device and Driver

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LinuxÖд󲿷ֵÄÉ豸Çý¶¯£¬¶¼¿ÉÒÔʹÓÃÕâÌ×»úÖÆ, É豸ÓÃPlatform_device±íʾ£¬Çý¶¯ÓÃPlatform_driver½øÐÐ×¢²á¡£
 
Linux platform driver»úÖÆºÍ´«Í³µÄdevice driver »úÖÆ(ͨ¹ýdriver_registerº¯Êý½øÐÐ×¢²á)Ïà±È£¬Ò»¸öÊ®·ÖÃ÷ÏÔµÄÓÅÊÆÔÚÓÚplatform»úÖÆ½«É豸±¾ÉíµÄ×ÊÔ´×¢²á½øÄںˣ¬ÓÉÄÚºËͳһ¹ÜÀí£¬ÔÚÇý¶¯³ÌÐòÖÐʹÓÃÕâЩ×ÊԴʱͨ¹ýplatform deviceÌṩµÄ±ê×¼½Ó¿Ú½øÐÐÉêÇ벢ʹÓá£ÕâÑùÌá¸ßÁËÇý¶¯ºÍ×ÊÔ´¹ÜÀíµÄ¶ÀÁ¢ÐÔ£¬²¢ÇÒÓµÓнϺõĿÉÒÆÖ²ÐԺͰ²È«ÐÔ(ÕâЩ±ê×¼½Ó¿ÚÊǰ²È«µÄ)¡£
 
Platform»úÖÆµÄ±¾ÉíʹÓò¢²»¸´ÔÓ£¬ÓÉÁ½²¿·Ö×é³É£ºplatform_deviceºÍplatfrom_driver¡£
ͨ¹ýPlatform»úÖÆ¿ª·¢·¢µ×²ãÇý¶¯µÄ´óÖÂÁ÷³ÌΪ:  ¶¨Òå platform_device à ×¢²á platform_device à ¶¨Òå platform_driver à×¢²á platform_driver¡£
 
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ÔÚ2.6ÄÚºËÖÐplatformÉ豸ÓýṹÌåplatform_deviceÀ´ÃèÊö£¬¸Ã½á¹¹Ì嶨ÒåÔÚkernel\include\linux\platform_device.hÖУ¬
struct platform_device {
 const char * name;
 u32  id;
 struct device dev;
 u32  num_resources;
 struct resource * resource;
};
 
¸Ã½á¹¹Ò»¸öÖØÒªµÄÔªËØÊÇresource£¬¸ÃÔªËØ´æÈëÁË×îÎªÖØÒªµÄÉ豸×ÊÔ´ÐÅÏ¢£¬¶¨ÒåÔÚkernel\include\linux\ioport.hÖУ¬
struct resource {
 const char *name;
 unsigned long start, end;
 unsigned long flags;
 struct resource *parent, *sibling, *child;
};
 
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/* arch/arm/mach-s3c2410/devs.c */
/* I2C */
static struct resource s3c_i2c_resource[] = {
         [0] = {
                   .start = S3C24XX_PA_IIC,
                   .end = S3C24XX_PA_IIC + S3C24XX_SZ_IIC - 1,
             


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