The bcm2835 SDHCI driver sets up the MMC host configuration via
sdhci_setup_cfg(), but does not parse generic MMC device tree
properties.
As a result, properties such as bus-width are ignored. On Raspberry Pi
Compute Module 4, the eMMC node describes an 8-bit bus, but U-Boot
initialized the device as 4-bit.
Call mmc_of_parse() before sdhci_setup_cfg() so that generic MMC
properties are folded into the host configuration before the MMC core
selects the bus width.
Before this change, mmc info reported:
Bus Speed: 52000000
Bus Width: 4-bit
After this change, mmc info reports:
Bus Speed: 52000000
Bus Width: 8-bit
Tested on Raspberry Pi Compute Module 4 with onboard eMMC.
Signed-off-by: Liel Harel <liel.harel@gmail.com>
Reviewed-by: Peter Robinson <pbrobinson@gmail.com>
Tested-by: Peter Robinson <pbrobinson@gmail.com> # on the CM4 as well
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