Hi Gailu, You might need to set an enable bit for the UART2 logical device in the EC. Can you run superiotool (from coreboot/util/superiotool) to dump the EC config registers on the CRB?
(I'm just guessing - I've never used a Bayley Bay CRB) On Fri, Nov 7, 2014 at 8:46 AM, Gailu Singh <[email protected]> wrote: > Hi, > > I got the schematics now and I see that J9B4 is connected to Embedded > Controller (EC), so I think that this is not 8250 UART2. Am I right? > > I am not able to find the documentation what purpose is served by Embedded > Controller and does coreboot use it at all? Any pointers please. I am > trying to understand what is the purpose of COM port at J9B4. Any specific > document that I should refer to to understand it? I checked user guide and > schematics. > > There are 2 com ports I see using usb to serial and Port0 is used for > console. Is another port on usb to serial is spare and can be used for > console or is it serving some other purpose in coreboot. > > > > On Fri, Nov 7, 2014 at 3:51 PM, Gailu Singh <[email protected]> wrote: > >> Hi Experts, >> >> I have working console uart 0 on Baytrail CRB board. However I am trying >> to change to uart 2 (J9B4) DB9 connector. I have changed >> CONFIG_UART_FOR_CONSOLE=2 from menuconfig, cleaned and rebuild and flashed >> coreboot but do not see any log on port 2. Is there any other changes >> required apart from CONFIG_UART_FOR_CONSOLE ? >> >> >> >> > > -- > coreboot mailing list: [email protected] > http://www.coreboot.org/mailman/listinfo/coreboot >
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