Hi all, I just posted three patches to use get_cd to detect the card (somebody has saw them, But I didn't receive them from Linux-mmc, I don't know why): [PATCH 1/3] SDHCI: add sdhci_get_cd callback to detect the card [PATCH 2/3] MMC/SD: add callback function to detect card [PATCH 3/3] SDHC/MMC: add f_min to mmc_power_on
I had posted them last year, but them were not accepted :( Now I will express my reason to add this function and welcome give your comment. "mmc_send_status" (that is used to check if the card has been removed, in file sd.c and mmc.c) will timeout when there is not SD/MMC card in slot, system will generate too many interrupts; even if the SD/MMC card present, there will generate many interrupts to return the card status from the SD/MMC card. Which will downgrade the performance of the system because system will take many time to handle these interrupts. Therefore, I use the callback function "get_cd" to read the Present State register and check the bit CINS, if the SD card present, which will be 1, otherwise it will be 0. Thanks and Best Regards Jerry Huang -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
