Andre, On 12/2/20 7:54 AM, Andre Przywara wrote: ... > + soc { > + compatible = "simple-bus"; > + #address-cells = <1>; > + #size-cells = <1>; > + ranges = <0x0 0x0 0x0 0x40000000>; > + > + syscon: syscon@3000000 { > + compatible = "allwinner,sun50i-h616-system-control", > + "allwinner,sun50i-a64-system-control"; > + reg = <0x03000000 0x1000>; > + #address-cells = <1>; > + #size-cells = <1>; > + ranges; > + > + sram_c: sram@28000 { > + compatible = "mmio-sram"; > + reg = <0x00028000 0x30000>; > + #address-cells = <1>; > + #size-cells = <1>; > + ranges = <0 0x00028000 0x30000>; > + }; > + > + sram_c1: sram@1a00000 { > + compatible = "mmio-sram"; > + reg = <0x01a00000 0x200000>; > + #address-cells = <1>; > + #size-cells = <1>; > + ranges = <0 0x01a00000 0x200000>; > + > + ve_sram: sram-section@0 { > + compatible = "allwinner,sun50i-h616-sram-c1", > + "allwinner,sun4i-a10-sram-c1"; > + reg = <0x000000 0x200000>; > + }; > + }; > + }; You mentioned that you could not find a SRAM A2. How were these SRAM ranges verified? If you can load eGON.BT0 larger than 32 KiB, then presumably NBROM uses SRAM C, and it is in the manual, but I see no mention of SRAM C1. Cheers, Samuel