On Wed, Jan 6, 2021 at 11:06 PM Andre Przywara <andre.przywara@xxxxxxx> wrote: > > The H6 manual explicitly lists a frequency limit of 150 MHz for the bus > frequency of the MMC controllers. So far we had no explicit limits in the > DT, which limited eMMC to a rather conservative 52 MHz. I'd say this is implementation specific. FreeBSD might have other defaults? > Put those maximum frequencies in the SoC .dtsi, to allow higher speed > modes (which still would need to be explicitly enabled, per board). > > Tested with an eMMC using HS-200 on a Pine H64. Running at the spec'ed > 200 MHz indeed fails with I/O errors, but 150 MHz seems to work stably. > > Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx> Fixes tag? Thanks ChenYu
