I don't have hardware to test, but I believe I've found a few more
necessary CONFIG options for this setup:
config SERIAL_8250_EXTENDED
bool "Extended 8250/16550 serial driver options"
depends on SERIAL_8250
help
If you wish to use any non-standard features of the standard
"dumb"
driver, say Y here. This includes HUB6 support, shared serial
interrupts, special multiport support, support for more than the
four COM 1/2/3/4 boards, etc.
Note that the answer to this question won't directly affect the
kernel: saying N will just cause the configurator to skip all
the questions about serial driver options. If unsure, say N.
config SERIAL_8250_SHARE_IRQ
bool "Support for sharing serial interrupts"
depends on SERIAL_8250_EXTENDED
help
Some serial boards have hardware support which allows
multiple dumb
serial ports on the same board to share a single IRQ. To enable
support for this in the serial driver, say Y here.
config SERIAL_8250_MANY_PORTS
bool "Support more than 4 legacy serial ports"
depends on SERIAL_8250_EXTENDED && !IA64
help
Say Y here if you have dumb serial boards other than the four
standard COM 1/2/3/4 ports. This may happen if you have an AST
FourPort, Accent Async, Boca (read the Boca mini-HOWTO,
available
from <http://www.tldp.org/docs.html#howto>), or other custom
serial port hardware which acts similar to standard serial port
hardware. If you only use the standard COM 1/2/3/4 ports, you
can
say N here to save some memory. You can also say Y if you
have an
"intelligent" multiport card such as Cyclades, Digiboards, etc.
Try toggling these and report back.
Thanks,
Cal
On 10/16/2017 01:11 AM, Mike Maggs wrote:
Request for assistance - Yocto 2.0 - Changing Kernel UART support
from 4 to 20
I am using Yocto 2.0 with Intel® Atom® 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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