I am trying to attached a console to the second serial port ttyS1. The second serial port will be used by another device, a touch panel, to configure and monitor the router. This what I've done so far:
1. I've enabled uart@500 in the device tree and rearranged the device tree so that uart@500 preceeds uart@c00. I've also added pinctrls for uartf
uart@500 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&uartf_pins>;
};2. I've configured the console for MT7620
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_NR_UARTS=4
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
CONFIG_SERIAL_8250_RT288X=y
CONFIG_SERIAL_OF_PLATFORM=y
CONFIG_SERIAL_8250_RALINK=y
#
#Non-8250 serial port support
#
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y3. bootargs
console=ttyS0,57600n8 console=ttyS1,57600n8 rootfstype=squashfs,jffs24. inittab
root@OpenWrt:/# cat /etc/inittab
::sysinit:/etc/init.d/rcS S boot
::shutdown:/etc/init.d/rcS K shutdown
::askconsole:/bin/ash --login
ttyS1::askfirst:/bin/sh
::restart:initI am basically trying to figure out how to get this kernel log message for ttyS1. it appears to be a simple linux configuration to get it to work, without much driver support, apparently not. As far as I can tell, everything points to the fact that it is configuredAny insight will be greatly appreciated.
console [ttyS1] enabled #this is what I hope to get if its configured and working rightroot@OpenWrt:/# dmesg | grep ttyS
[ 0.000000] Kernel command line: console=ttyS0,57600n8 console=ttyS1,57600n8 rootfstype=squashfs,jffs2
[ 0.710000] console [ttyS0] disabled
[ 0.720000] 10000c00.uartlite: ttyS0 at MMIO 0x10000c00 (irq = 20, base_baud = 2500000) is a 16550A
[ 1.440000] console [ttyS0] enabled
[ 1.460000] 10000500.uart: ttyS1 at MMIO 0x10000500 (irq = 13, base_baud = 2500000) is a 16550A
root@OpenWrt:/# ps
root@OpenWrt:/# ps
PID USER VSZ STAT COMMAND
1 root 1572 S /sbin/procd
2 root 0 SW [kthreadd]
3 root 0 SW [ksoftirqd/0]
4 root 0 SW [kworker/0:0]
5 root 0 SW< [kworker/0:0H]
6 root 0 SW [kworker/u2:0]
7 root 0 SW< [khelper]
71 root 0 SW< [writeback]
72 root 0 SW< [crypto]
75 root 0 SW< [bioset]
77 root 0 SW< [kblockd]
79 root 0 SW [kswapd0]
80 root 0 SW [kworker/0:1]
111 root 0 SW [fsnotify_mark]
172 root 0 SW [spi32766]
240 root 0 SW< [ipv6_addrconf]
255 root 0 SW< [deferwq]
305 root 0 SWN [jffs2_gcd_mtd6]
367 root 1204 S /sbin/ubusd
368 root 1332 S /bin/ash --login
369 root 896 S /sbin/askfirst /bin/sh
502 root 0 SW< [cfg80211]
567 root 0 SW [kworker/u2:2]
643 root 1200 S /sbin/logd -S 16
676 root 1704 S /sbin/netifd
688 root 1320 S /usr/sbin/odhcpd
731 root 1048 S /usr/sbin/dropbear -F -P /var/run/dropbear.1.pid -p
749 root 1052 S /usr/sbin/uhttpd -f -h /www -r OpenWrt -x /cgi-bin -
795 root 1332 S /usr/sbin/ntpd -n -S /usr/sbin/ntpd-hotplug -p 0.ope
863 root 1332 S udhcpc -p /var/run/udhcpc-eth0.2.pid -s /lib/netifd/
868 root 932 S odhcp6c -s /lib/netifd/dhcpv6.script -P0 -t120 eth0.
923 nobody 1100 S /usr/sbin/dnsmasq -C /var/etc/dnsmasq.conf -k -x /va
1024 root 1332 R ps/proc/devices
root@OpenWrt:/# cat /proc/devices
Character devices:
1 mem
4 ttyS
5 /dev/tty
5 /dev/console
5 /dev/ptmx
10 misc
90 mtd
108 ppp
128 ptm
136 pts
254 watchdog
Block devices:
259 blkext
31 mtdblock/proc/interrupt
root@OpenWrt:/# cat /proc/interrupts
CPU0
5: 424 MIPS 5 10100000.ethernet
7: 113209 MIPS 7 systick
9: 0 INTC 1 10000100.timer
13: 3 INTC 5 serial
20: 1254 INTC 12 serial
25: 3 INTC 17 gsw
ERR: 0pinctrl for uartlite and uartf
pinctrl core: add 1 pinmux maps
[ 0.710000] rt2880-pinmux pinctrl: found group selector 3 for uartlite
[ 0.710000] rt2880-pinmux pinctrl: request pin 15 (io15) for 10000c00.uartlite
[ 0.710000] rt2880-pinmux pinctrl: request pin 16 (io16) for 10000c00.uartlite
[ 0.710000] console [ttyS0] disabled
[ 0.720000] 10000c00.uartlite: ttyS0 at MMIO 0x10000c00 (irq = 20, base_baud = 2500000) is a 16550A
[ 1.440000] console [ttyS0] enabled
[ 1.460000] pinctrl core: add 1 pinmux maps
[ 1.460000] rt2880-pinmux pinctrl: found group selector 1 for uartf
[ 1.460000] rt2880-pinmux pinctrl: request pin 7 (io7) for 10000500.uart
[ 1.460000] rt2880-pinmux pinctrl: request pin 8 (io8) for 10000500.uart
[ 1.460000] rt2880-pinmux pinctrl: request pin 9 (io9) for 10000500.uart
[ 1.460000] rt2880-pinmux pinctrl: request pin 10 (io10) for 10000500.uart
[ 1.460000] rt2880-pinmux pinctrl: request pin 11 (io11) for 10000500.uart
[ 1.460000] rt2880-pinmux pinctrl: request pin 12 (io12) for 10000500.uart
[ 1.460000] rt2880-pinmux pinctrl: request pin 13 (io13) for 10000500.uart
[ 1.460000] rt2880-pinmux pinctrl: request pin 14 (io14) for 10000500.uart
[ 1.460000] 10000500.uart: ttyS1 at MMIO 0x10000500 (irq = 13, base_baud = 2500000) is a 16550Astty outputs
root@OpenWrt:/# stty -F /dev/ttyS0
speed 57600 baud; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R;
werase = ^W; lnext = ^V; flush = ^O; min = 1; time = 0;
-brkint -imaxbel
speed 9600 baud; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R;
werase = ^W; lnext = ^V; flush = ^O; min = 1; time = 0;
-brkint -imaxbelFunny (double) log kernel messages after adding ttyS1 to inittab
[ 1.410000] console [ttyS0] enabled
[ 1.410000] console [ttyS0] enabled
[ 1.430000] 10000500.uart: ttyS1 at MMIO 0x10000500 (irq = 13, base_baud = 2500000) is a 16550A
[ 1.430000] 10000500.uart: ttyS1 at MMIO 0x10000500 (irq = 13, base_baud = 2500000) is a 16550A
[ 1.470000] m25p80 spi32766.0: found w25q128, expected en25q64
[ 1.470000] m25p80 spi32766.0: found w25q128, expected en25q64
[ 1.490000] m25p80 spi32766.0: w25q128 (16384 Kbytes)
[ 1.490000] m25p80 spi32766.0: w25q128 (16384 Kbytes)
[ 1.510000] 4 ofpart partitions found on MTD device spi32766.0
[ 1.510000] 4 ofpart partitions found on MTD device spi32766.0
[ 1.530000] Creating 4 MTD partitions on "spi32766.0":
[ 1.530000] Creating 4 MTD partitions on "spi32766.0":
[ 1.550000] 0x000000000000-0x000000030000 : "u-boot"
[ 1.550000] 0x000000000000-0x000000030000 : "u-boot"
[ 1.580000] 0x000000030000-0x000000040000 : "u-boot-env"
[ 1.580000] 0x000000030000-0x000000040000 : "u-boot-env"
[ 1.600000] 0x000000040000-0x000000050000 : "factory"
[ 1.600000] 0x000000040000-0x000000050000 : "factory"
[ 1.620000] 0x000000050000-0x000000800000 : "firmware"
[ 1.620000] 0x000000050000-0x000000800000 : "firmware"
[ 1.700000] 2 uimage-fw partitions found on MTD device firmware
[ 1.700000] 2 uimage-fw partitions found on MTD device firmware
[ 1.720000] 0x000000050000-0x00000017d393 : "kernel"
[ 1.720000] 0x000000050000-0x00000017d393 : "kernel"
[ 1.750000] 0x00000017d393-0x000000800000 : "rootfs"
[ 1.750000] 0x00000017d393-0x000000800000 : "rootfs"
[ 1.770000] mtd: device 5 (rootfs) set to be root filesystem
[ 1.770000] mtd: device 5 (rootfs) set to be root filesystem
[ 1.790000] 1 squashfs-split partitions found on MTD device rootfs
[ 1.790000] 1 squashfs-split partitions found on MTD device rootfs
[ 1.810000] 0x000000370000-0x000000800000 : "rootfs_data"
[ 1.810000] 0x000000370000-0x000000800000 : "rootfs_data"
[ 1.870000] ralink_soc_eth 10100000.ethernet: generated random MAC address 42:3f:79:e3:86:2a
[ 1.870000] ralink_soc_eth 10100000.ethernet: generated random MAC address 42:3f:79:e3:86:2a
[ 1.910000] libphy: mdio: probed
[ 1.910000] libphy: mdio: probed
[ 1.940000] ralink_soc_eth 10100000.ethernet: connected port 4 to PHY at mdio-bus:04 [uid=03a2940d, driver=Generic PHY]
[ 1.940000] ralink_soc_eth 10100000.ethernet: connected port 4 to PHY at mdio-bus:04 [uid=03a2940d, driver=Generic PHY]
[ 2.070000] ralink_soc_eth 10100000.ethernet: connected port 5 to PHY at mdio-bus:05 [uid=0000ffff, driver=Generic PHY]
[ 2.070000] ralink_soc_eth 10100000.ethernet: connected port 5 to PHY at mdio-bus:05 [uid=0000ffff, driver=Generic PHY]
[ 2.120000] ralink_soc_eth 10100000.ethernet: loaded mt7620 driver
[ 2.120000] ralink_soc_eth 10100000.ethernet: loaded mt7620 driver
[ 2.150000] ralink_soc_eth 10100000.ethernet eth0: ralink at 0xb0100000, irq 5
[ 2.150000] ralink_soc_eth 10100000.ethernet eth0: ralink at 0xb0100000, irq 5
[ 2.180000] rt2880_wdt 10000120.watchdog: Initialized
[ 2.180000] rt2880_wdt 10000120.watchdog: Initialized
[ 2.200000] TCP: cubic registered
[ 2.200000] TCP: cubic registered
[ 2.210000] NET: Registered protocol family 10
[ 2.210000] NET: Registered protocol family 10
[ 2.230000] NET: Registered protocol family 17
[ 2.230000] NET: Registered protocol family 17
[ 2.250000] bridge: automatic filtering via arp/ip/ip6tables has been deprecated. Update your scripts to load br_netfilter if you need this.
[ 2.250000] bridge: automatic filtering via arp/ip/ip6tables has been deprecated. Update your scripts to load br_netfilter if you need this.Non OpenWrt Errors from touch panel not being able to get to the ttyS1
2109 1110664336 NetworkInterface INFO Control-C the Network Module
2109 1110664336 NetworkInterface ERROR Failed to get shell prompt -
2109 1110664336 NetworkInterface INFO Control-C the Network Module
2109 1110664336 NetworkInterface ERROR Failed to get shell prompt -
2109 1110664336 NetworkInterface INFO Control-C the Network Module
2109 1110664336 NetworkInterface ERROR Failed to get shell prompt -