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@st-md-mailman.stormreply.com
On Behalf Of Patrick DELAUNAY
Hi,
From: Alexandru Gagniuc mr.nuke.me@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@gmail.com
drivers/mmc/mmc-uclass.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
Reviewed-by: Patrick Delaunay patrick.delaunay@st.com Tested-by: Patrick Delaunay patrick.delaunay@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@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 _______________________________________________ Uboot-stm32 mailing list Uboot-stm32@st-md-mailman.stormreply.com https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fst-m
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