arm: stm32h7: Support for the STM32H747I-DISCO board

[Patrice CHOTARD]

Hi Johannes

On 3/2/22 16:26, Johannes (krjdev) Krottmayer wrote:
> Hi,
> 
> I want add support for STM32H747I-DISCO from STMicroelectronics,
> for the purpose of education. Want to use U-Boot as boot-loader
> for my projects.
> 
> Here you the official website from the board:
> https://www.st.com/en/evaluation-tools/stm32h747i-disco.html
> 
> But there some issues on the website:
> - According the website, the board has 256Mbit external SDRAM
> 
> That's not true. There is a 512MBit SDRAM from ISSI mounted.
> 
> Can I release a patch series here, when my work is done? I don't
> know if there any interest for other users exists, to add here
> the support to U-Boot.

Yes please, it's still useful to get a new STM32 board supported in U-Boot ;-)

> 
> Currently creating the device-trees for the SoC and the board.
> But must at least modify (fix) the drivers for the board:
> 
> drivers/clk/clk_stm32h7.c has some issues in the probe function:
> 
> The endless loop of dead, without a timeout when reading the
> registers on some possible condition, without warn the user
> (put some error messages and call the hang function).
Patrick and i saw your mail about this issue, and i agree, in some case there 
is an issue with this clock driver.
Patrick will answer to you about this issue.

Thanks
Patrice

> 
> Kind regards,
> 
> Johannes K.