[PATCH 1/2] mmc: mmc_of_parse: Enable 52 MHz support with "cap-mmc-highspeed"

[Peng Fan]

> Subject: RE: [PATCH 1/2] mmc: mmc_of_parse: Enable 52 MHz support with
> "cap-mmc-highspeed"
> 
> Hi Peng,
> 
> > From: Uboot-stm32
> <uboot-stm32-bounces at st-md-mailman.stormreply.com>
> > On Behalf Of Patrick DELAUNAY
> >
> > Hi,
> >
> > > From: Alexandru Gagniuc <mr.nuke.me at gmail.com>
> > > Sent: mardi 15 septembre 2020 21:52
> > >
> > > "cap-mmc-highspeed" enables support for 26 MHz MMC, but there is no
> > > additional flag to enable 52 MHz MMC. In Linux. "cap-mmc-highspeed"
> > > is used for MMC HS at both 26MHz and 52MHz.
> > >
> > > Use the same approach and enable MMC_CAP(MMC_HS_52) host
> capability
> > > when "cap-mmc-highspeed" is found in the devicetree. In the event an
> > > MMC card doesn't support 52 MHz, it will be clocked at a speed based
> > > on its EXT CSD, even on 52 MHz host controllers
> > >
> > > Signed-off-by: Alexandru Gagniuc <mr.nuke.me at gmail.com>
> > > ---
> > >  drivers/mmc/mmc-uclass.c | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> >
> > Reviewed-by: Patrick Delaunay <patrick.delaunay at st.com>
> > Tested-by: Patrick Delaunay <patrick.delaunay at st.com>
> >
> > Tested on STM32MP157C-EV1, for mmc 1 = emmc with patch [1]
> >
> > 	Mode: MMC High Speed (52MHz)
> >
> > [1]: mmc: stm32_sdmmc2: Use mmc_of_parse() to read host capabilities
> >
> > https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fpatch
> >
> work.ozlabs.org%2Fproject%2Fuboot%2Fpatch%2F20200909215402.366561-
> 1-&a
> >
> mp;data=02%7C01%7Cpeng.fan%40nxp.com%7C2242885f15fb4bc5a38508d
> 866d261c
> >
> e%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C63737240105383
> 8309&
> >
> sdata=NJ1fDTquBTBOQVMdxYf3gTExxkNEHeZ9mnazXAKY0GQ%3D&rese
> rved=0
> > mr.nuke.me at gmail.com/
> 
> Today this patch is delegate to me in patchwork even it is a mmc core patch:
> 
> https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fpatchw
> ork.ozlabs.org%2Fproject%2Fuboot%2Flist%2F%3Fseries%3D201912&da
> ta=02%7C01%7Cpeng.fan%40nxp.com%7C2242885f15fb4bc5a38508d866d2
> 61ce%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C63737240105
> 3848304&sdata=J4b9Dy%2FnujRrpiYtaQbIq68w%2F2FfKlKoMheH8Mtae
> P8%3D&reserved=0
> 
> You are OK if I integrate this patch in my stm32 pull request for v2020.01-rc1
> or I delegate to you ?

You could take that first. My PR will be later.

Thanks,
Peng.

> 
> >
> > Thanks
> >
> > Patrick
> > _______________________________________________
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> >
> d-mailman.stormreply.com%2Fmailman%2Flistinfo%2Fuboot-stm32&dat
> a=0
> >
> 2%7C01%7Cpeng.fan%40nxp.com%7C2242885f15fb4bc5a38508d866d261ce
> %7C686ea
> >
> 1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637372401053848304&
> sdata=DDw
> >
> sEwf%2F%2B3JOeITkO2pnUjJFu4hpru5DqY5FUGNnXdM%3D&reserved=
> 0