Messages in this thread | | | From | Chunyan Zhang <> | Date | Wed, 21 Mar 2018 17:58:50 +0800 | Subject | Re: [PATCH 0/3] mmc: add support for sdhci 4.0 |
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Hi Adrian,
On 20 March 2018 at 17:18, Adrian Hunter <adrian.hunter@intel.com> 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(-) >> >
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