[meta-intel] Request for assistance - Yocto 2.0 - Changing Kernel UART support from 4 to 20

[Mike Maggs]

Request for assistance - Yocto 2.0 - Changing Kernel UART support  from 4 to 20



I am using Yocto 2.0 with Intel(r) Atom(r) Processor E3800 with Open Source Graphics (Valley Island) BSP from https://www.yoctoproject.org/downloads/bsps/jethro20/valley-island on My Custom SMARC Carrier using Adlink LEC-BTS SMARC Processor with Intel E3845 Processor with 2 x EXAR PCIe XR17V358s (16 UARTs) and 2 x Intel i210 Ethernet Controllers



I have done the following

  1.  Verified that the Hardware is working using Fedora 18 with Exar XR17V358 driver



                                cat /proc/tty/driver/xrserial

                                               serinfo:1.0 driver revision:

                                                0: uart:XR17v35x mmio:0xD0800000 irq:16 tx:0 rx:0

                                                1: uart:XR17v35x mmio:0xD0800400 irq:16 tx:0 rx:0

                                                2: uart:XR17v35x mmio:0xD0800800 irq:16 tx:0 rx:0

                                                3: uart:XR17v35x mmio:0xD0800C00 irq:16 tx:0 rx:0

                                                4: uart:XR17v35x mmio:0xD0801000 irq:16 tx:0 rx:0

                                                5: uart:XR17v35x mmio:0xD0801400 irq:16 tx:0 rx:0

                                                6: uart:XR17v35x mmio:0xD0801800 irq:16 tx:0 rx:0

                                                7: uart:XR17v35x mmio:0xD0801C00 irq:16 tx:0 rx:0

                                                8: uart:XR17v35x mmio:0xD0802000 irq:16 tx:0 rx:0

                                                9: uart:XR17v35x mmio:0xD0802400 irq:16 tx:0 rx:0

                                                10: uart:XR17v35x mmio:0xD0802800 irq:16 tx:0 rx:0

                                                11: uart:XR17v35x mmio:0xD0802C00 irq:16 tx:0 rx:0

                                                12: uart:XR17v35x mmio:0xD0803000 irq:16 tx:0 rx:0

                                                13: uart:XR17v35x mmio:0xD0803400 irq:16 tx:0 rx:0

                                                14: uart:XR17v35x mmio:0xD0803800 irq:16 tx:0 rx:0

                                                15: uart:XR17v35x mmio:0xD0803C00 irq:16 tx:0 rx:0



2. Created a file named 8250.cfg in the files directory with the following content (without indentation):

                              CONFIG_SERIAL_8250=y

CONFIG_SERIAL_8250_CONSOLE=y

CONFIG_SERIAL_8250_PCI=y

CONFIG_SERIAL_8250_NR_UARTS=20

CONFIG_SERIAL_8250_RUNTIME_UARTS=20

CONFIG_SERIAL_CORE=y

CONFIG_SERIAL_CORE_CONSOLE=y



Next, include this configuration fragment and extend the FILESPATH variable in your .bbappend file:

FILESEXTRAPATHS_prepend := "${THISDIR}/files:"

SRC_URI += "file://8250.cfg"



3. Kernel Config using menuconfig tool



Changed

                            CONFIG_SERIAL_8250_NR_UARTS=20

                               CONFIG_SERIAL_8250_RUNTIME_UARTS=20



                                         My other Kernel Config changes for the Intel i210 are working



4. Running Yocto Dylan Image (No support for Intel HSUART)



                        cat /proc/tty/driver/serial

                                        serinfo:1.0 driver revision:

                                        0: uart:16550A port:000003F8 irq:4 tx:2069 rx:115 RTS|DTR

                                        1: uart:XR17V35X mmio:0xD0900000 irq:16 tx:0 rx:0

                                        2: uart:XR17V35X mmio:0xD0900400 irq:16 tx:0 rx:0

                                        3: uart:XR17V35X mmio:0xD0900800 irq:16 tx:0 rx:0



5. Running Yocto 2.0 Jethro Image (With support for Intel HSUART)



cat /proc/tty/driver/serial

serinfo:1.0 driver revision:

0: uart:16550A port:000003F8 irq:4 tx:2042 rx:117 RTS|DTR

1: uart:16550A mmio:0xD0922000 irq:18 tx:0 rx:0 DSR|CD

2: uart:16550A mmio:0xD0920000 irq:19 tx:0 rx:0 DSR|CD

3: uart:XR17V35X mmio:0xD0800000 irq:16 tx:0 rx:0





Hoping that you will be able to help

Regards

Mike Maggs

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