Hi, On 23 May 2018 at 12:04, Simon Glass <s...@chromium.org> wrote: > On 23 May 2018 at 11:56, Vabhav Sharma <vabhav.sha...@nxp.com> wrote: >> Hello Everyone, >> >> I am working on integrating generic PL011 driver in u-boot and linux for
Note, it is 'U-Boot' >> ARMv8 NXP SoC and facing issue with multiple UART console enablement in >> u-boot using DM model >> >> Kindly provide your valuable feedback and experts comments. >> >> >> >> DTS require stdout-path(e.g-UART0) to the /chosen device tree node >> ,Accordingly controller(UART0) is probed/initialized as boot console >> >> On u-boot prompt, Bootargs is modified to use UART1(ttyAMA1) console for >> linux boot but kernel hangs after “Starting kernel ... print” >> >> >> >> After debugging it’s found that UART1 is not initialized and single(first) >> controller is probed/initialized in u-boot (Irrespective of 4 UART nodes >> are enabled in dts) >> >> In drivers/serial/serial-uclass.c ,gd->cur_serial_dev is updated to the DT >> stdout-path or CONFIG_CONS_INDEX or platform data(first index) >> >> >> >> Does the u-boot DM model support only one or multiple UART driver >> probing/initialization? Is there any configuration parameter required to >> define number of UART controllers to be probed/initialized. >> >> This looks limitation as same boot console is used for u-boot and linux and >> unable to use all available UART controllers. >> >> >> >> I am new to u-boot and please correct any misunderstanding >> >> Let me know If I can submit a patch for multiple UART probe in serial-uclass >> or open a bug for multiple UART support in u-boot DM model You can probe additional serial drivers if you like. U-Boot only probes things in a 'lazy' manner so far. Perhaps you could submit a patch which probes all serial devices? That is just a case of using uclass_first_device()...uclass_next_device() to iterate through them. I suppose we could have a CONFIG option to enable this. >> >> >> >> PS:I am unable to find owner of serial uclass driver from MAINTAINERS file Not guilty but I did port a lot of things to driver model. >> >> >> >> Regards, >> >> Vabhav >> >> Regards, Simon _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot