Hello Tomoya, Am Mittwoch, 14. März 2012, 10:17:35 schrieb Tomoya MORINAGA: > Hi Alexander > > As a matter of interest, > do you mean that current MMC of eg20t on Linux doesn't support 8-bit access? We have a board with an 8-bit connected eMMC and Linux only used 4-bit wide bus access. After some research IMO the device is only matched to the default PCI id class > PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00) AFAICS it's the same issue with the Medfield eMMC where 8-bit bus support is added in 0d013bcf5c272faea1f8e7a5ef3cb2e98103d5cb This also states the default is 4-bit bus width which I saw before. Regards, Alexander -- Dipl.-Inf. Alexander Stein SYS TEC electronic GmbH August-Bebel-Str. 29 D-07973 Greiz Tel: +49-3661-6279-0, Fax: +49-3661-6279-99 eMail: Alexander.Stein@xxxxxxxxxxxxxxxxxxxxx Internet: http://www.systec-electronic.com Managing Director: Dipl.-Phys. Siegmar Schmidt Commercial registry: Amtsgericht Jena, HRB 205563 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
