Jakub Zdroik

@davids5 Hi, tnx for reply. > Did you add the HW and and pull ~50 pull ups on all the lines to the card but not the clock line? Yes...

@davids5 GPIO setup seams to be OK. Mode is set for pins as Alternate Alternate function of pins is set - ALT12 (1100) I even added internal pullup config for...

I think there is no tested support for STM32L4R5ZI uC SDMMC - SDIO - yet. And comparing registers gave me clues (tnx @davids5) but GPIO is the least problem. What...

**RNG and OTGFS dependency on SDMMC system is introduced by an error in header file stm32l4r9ai-disco-clocking.h** There is an config variable `STM32L4_SDMMC` but should be `CONFIG_STM32L4_SDMMC` on lines [135](https://github.com/apache/incubator-nuttx/blob/dd718e78f70f9350ac648067509672c5051841b9/boards/arm/stm32l4/stm32l4r9ai-disco/include/stm32l4r9ai-disco-clocking.h#L135), [245](https://github.com/apache/incubator-nuttx/blob/dd718e78f70f9350ac648067509672c5051841b9/boards/arm/stm32l4/stm32l4r9ai-disco/include/stm32l4r9ai-disco-clocking.h#L245),...

@davids5, I exacly went that road H7 have same registers as L4+. I went further and have some preliminary results. But eventualy L4+ will have different config variables than L4....

Hi, I've reached out to google, and here is the nice [L4+ vs L4 comparison](https://www.stmicroelectronics.com.cn/content/ccc/resource/training/technical/product_training/group0/38/14/f0/84/28/e0/4b/40/STM32L4Plus_Introduction_Delta_STM32L4_Series/files/STM32L4Plus_Introduction_Delta_STM32L4_Series.pdf/_jcr_content/translations/en.STM32L4Plus_Introduction_Delta_STM32L4_Series.pdf). I mean it's better than comparing 2k+ pages documents ;) Unfortunately document doesn't mention things...