How to configure 512MB*2 DDR ram in u boot?

[Sindhu Vadde]

Hi,

We are using stm32mp157a processorin Ubootv2018.11-stm32mp1-r2.1 version. In this DDR has 512MB of memory. We want to change DDR size 512MB to 1 GB ,how can we do that? and what are the files we need to modify for changing ddr size in uboot?

Please help us.

[Olivier GALLIEN · Accepted solution]

Hi @Sindhu Vadde​ ,

As all HW related parameter this is managed through Device Tree.

So the DDR with 512MB you reported for your uboot is related to a specific board config/ device tree.

See DDRCTRL and DDRPHYC device tree configuration - stm32mpu

Pay attention that it should be handle in TF-A also and first.

You can refer to ST EV1 board configuration which as 1GB density.

STM32CubeMX also provide easy way to configure DDR size ( and all other design related aspect ) .

Hope it help,

Olivier

[Sindhu Vadde]

Thank you ,Its working with ST EV1 board configuration.