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

Patrick DELAUNAY patrick.delaunay at st.com
Wed Oct 21 09:59:28 CEST 2020


Hi Alexandru,

> From: Alexandru Gagniuc <mr.nuke.me at gmail.com>
> Sent: mardi 15 septembre 2020 21:52
> To: uboot-stm32 at st-md-mailman.stormreply.com; peng.fan at nxp.com
> Cc: Alexandru Gagniuc <mr.nuke.me at gmail.com>; Patrick DELAUNAY
> <patrick.delaunay at st.com>; Patrice CHOTARD <patrice.chotard at st.com>; u-
> boot at lists.denx.de
> Subject: [PATCH 1/2] mmc: mmc_of_parse: Enable 52 MHz support with "cap-
> mmc-highspeed"
> Importance: High
> 
> "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(-)
> 

Applied to u-boot-stm/master, thanks!

Regards

Patrick


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