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IDProjectCategoryView StatusLast Update
0002090fsimx_LinuxSerial Driver/Interfacepublic2015-07-28 10:52
ReporterKeller Assigned To 
PrioritynormalSeverityminorReproducibilityhave not tried
Status resolvedResolutionfixed 
Product VersioniMX6-V1.2 
Target Versionfsimx6-V2.0Fixed in Versionfsimx6-V2.0 
Summary0002090: armStoneA9: When using ttymxc2 as serial console, ttymxc1 soes not work anymore
DescriptionCustomer wants to use ttymxc1 in Linux. So he changes serial console from ttymxc1 to ttymxc2 in the bootargs in U-Boot. But when he tries to access ttymxc1, the system hangs. If he completely removes console support from the kernel, ttymxc1 does work correctly.
Steps To ReproduceSteps as given from the customer:
- Switch console from ttymxc1 to ttymxc2 in U-Boot bootargs
- Boot to Linux, console will show output on ttymxc2 now
- Type "echo hello >/dev/ttymxc1". The system will hang.
Additional InformationMaybe some initialization is missing as it is assumed to have been done in U-Boot already. Judging from the Vybrid implementation that was based on i.MX6 code, maybe the FIFO is not enabled correctly. So we could probably cross-check with what we changed in the Vybrid code to make it work.
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