[PATCH 2/2] ARM: dts: imx8mm-beacon: add UHS and HS400/HS400ES properties

[Adam Ford]

On Wed, Dec 30, 2020 at 10:34 AM Fabio Estevam <festevam at gmail.com> wrote:
>
> On Wed, Dec 30, 2020 at 1:29 PM Adam Ford <aford173 at gmail.com> wrote:
>
> > In the meantime, would you be opposed to this patch since other imx8m
> > kits have the equivalent patch already applied?  They could be removed
> > if/when the esdhc driver gets updated.
>
> I am not opposed to this patch, but would be nice if the U-Boot esdhc
> driver could be changed to behave like the kernel one.

I just sent an RFC [1] for change that uses the esdhc_soc_data flags
to determine whether or not the function/feature is present in the
controller and checks to see if the function is enabled from Kconfig.

I was able to remove the u-boot.dtsi changes that I previously pushed,
and I was able to see that the eMMC device is running at HS400_ES
(200MHz)

u-boot=> mmc dev 2
switch to partitions #0, OK
mmc2(part 0) is current device
u-boot=> mmc info
Device: FSL_SDHC
Manufacturer ID: 45
OEM: 100
Name: DG403
Bus Speed: 200000000
Mode: HS400ES (200MHz)
Rd Block Len: 512
MMC version 5.1
High Capacity: Yes
Capacity: 29.1 GiB
Bus Width: 8-bit DDR
Erase Group Size: 512 KiB
HC WP Group Size: 8 MiB
User Capacity: 29.1 GiB WRREL
Boot Capacity: 4 MiB ENH
RPMB Capacity: 4 MiB ENH
Boot area 0 is not write protected
Boot area 1 is not write protected
u-boot=>

[1] - https://patchwork.ozlabs.org/project/uboot/patch/20201230173907.2891555-1-aford173@gmail.com/