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system call open() from: http://linux2fork.blogspot.com/2013/04/system-call-open.html 今天review linux character driver的時候,發現往往定義的file_operations的.open成 阅读全文
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linux irq request_threaded_irq()参数含义 int request_threaded_irq(unsigned int irq, irq_handler_t handler, irq_handler_t thread_fn, unsigned long irqflags 阅读全文
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User Area from:http://ericnode.info/post/how_to_determine_emmc_size/ 计算方法其实已经在规范中给出了,参考eMMC 5.0 spec里的段落。首先是: 7.3.12 C_SIZE [73:62] The C_SIZE paramet 阅读全文
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get the emmc capacity in kernel 4.19\drivers\mmc\core\Mmc.c static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd) if (card->ext_csd.rev >= 阅读全文