arm64: dts: st: add sdmmc2 pins_b for stm32mp25

Add a second variant of the SDMMC2 default and open-drain pin groups,
with the same pins and bias as the _a variant but faster output speeds:
very high on CK, high on CMD and D0-D7. These are the OSPEEDR values
given in the STM32MP25 datasheet for 120 MHz and 166 MHz operation.

On the STM32MP257F-DK, the eMMC returns corrupted data in HS200 mode
at 100 MHz with the _a groups, and no CRC error is reported. With the
_b groups, four consecutive 1 GiB reads return the same data as a read
at 50 MHz.

The sleep groups are shared with the _a variant.

Signed-off-by: Mateusz Nowicki <mateusz.nowicki@posteo.net>
Link: https://lore.kernel.org/r/20260923114714.140842-2-mateusz.nowicki@posteo.net
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>

0 files changed, 0 insertions, 0 deletions