Hi Adrian, On 20 March 2018 at 17:18, Adrian Hunter <adrian.hunter@xxxxxxxxx> wrote: > On 20/03/18 10:36, Chunyan Zhang wrote: >>>From the SD host controller version 4.0 on, SDHCI implementation either >> is version 3 compatible or version 4 mode. This patch-set covers those >> changes which are common for SDHCI 4.0 version, regardless of whether >> they are used with SD or eMMC storage devices. > > Why use v4 mode? > > What driver is using v4 mode? Can you also post those changes? I believe there must be some out-of-tree driver using v4 mode, at least Spreadtrum's sd host controller is, as I know, and they're planning on upstreaming that driver. Those changes which this patch-set covers are just in the subject of each patch in this series :) > > Are you planning on adding UHS-II support also? Yes, that's my preliminary plan. BTW, this patchset should have prefix "RFC", I just forgot to add that. Thanks for your comments, Chunyan > >> >> Chunyan Zhang (3): >> mmc: sdhci: add sd host v4 mode >> mmc: sdhci: made changes for System Address register of SDMA >> mmc: sdhci: add ADMA2 64-bit addressing support for V4 mode >> >> drivers/mmc/host/sdhci.c | 66 +++++++++++++++++++++++++++++++++++++----------- >> drivers/mmc/host/sdhci.h | 29 +++++++++++++++++---- >> 2 files changed, 75 insertions(+), 20 deletions(-) >> > -- 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
