On 25/09/2020 09:46, Pali Rohár wrote:
On Friday 11 September 2020 06:35:10 Andre Heider wrote:
...
+#ifdef CONFIG_BOARD_LATE_INIT
+int board_late_init(void)
+{
+ bool ddr4, emmc;
+
+ if (env_get("fdtfile"))
+ return 0;
+
+ if (!of_machine_is_compatible("globalscale,espressobin"))
+ return 0;
+
+ /* If the memory controller has been configured for DDR4, we're running
on v7 */
+ ddr4 = ((readl(A3700_CH0_MC_CTRL2_REG) >>
A3700_MC_CTRL2_SDRAM_TYPE_OFFS)
+ & A3700_MC_CTRL2_SDRAM_TYPE_MASK) ==
A3700_MC_CTRL2_SDRAM_TYPE_DDR4;
+
+ emmc = of_machine_is_compatible("globalscale,espressobin-emmc");
Maybe stupid question, but are not we able to detect if eMMC is
connected or not at runtime? That could simplify setup and avoid usage
of additional special DTS file for eMMC in U-Boot.
At some point I wondered about the same.
IIRC armbian just enables it and uses one u-boot binary everywhere. A
non-existing chip won't get detected, so that shouldn't be a problem.
But I think it has more to do with enabling/powering up hardware blocks,
which is not wanted or may even problematic.
Regards,
Andre
