Hi, I was in process of adding of_earlycon to the 8250_dw driver and found the following: 1) At the early boot stage, i.e., when early_init_dt_scan_chosen_serial is called, there's no support of parsing specific device tree properties under a node 2) For more generic 8250 based serial controllers like 8250_dw that supports various types of MMIO access including 8b MMIO, and 32b little endian MMIO, and etc., there's no way to allow implementing a generic OF_EARLYCON support since its device tree property "reg-io-width", cannot be parsed at the early boot stage, and hardcoding the port iotype to a specific type in the earlycon setup function will make it work only for one particular type of IO If both above statements are true, then does it make more sense to continue to use boot parameter based earlycon support for this type of serial controllers? Thanks, Ray -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
