On 01/-10/-28163 12:59 PM, Macpaul Lin wrote: > This reverts commit 02f3029f1810b99869254d0cf0a71946a008a728. > > This patch add 3 times retry to CMD8 because the Marvell mmc controller > doesn't obey the power ramp up process in the SD specification 6.4.1. > (Please refer to figure 6.1 and 6.2 in the specification.) > > The CMD0 should be send after power ramp up has been finished. > However, the Marvell mmc contorller must do power ramp up after the > first CMD0 command has been send. > > This patch also affect existing platforms like Nokia N900 and other > platforms. > > Signed-off-by: Macpaul Lin <macp...@andestech.com> > Acked-by: Lei Wen <lei...@marvell.com>
Acked-by: Stephen Warren <swar...@nvidia.com> Tested-by: Stephen Warren <swar...@nvidia.com> As background, I'm working on patches to support the Toshiba AC100 / Dynabook AZ in mainline U-Boot. The internal MMC didn't work at all until this revert was applied. The SD slot worked perfectly though. I guess this is related to the MMC itself not supporting this (SD-specific?) command, and the patch caused MMC mode never to be attempted. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
