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分享[求助]Openwrt MT7620A 第二个串口打开
如下为板子启动过程，
..............................省略无关信息..............................
[ 0.070000] pinctrl core: registered pin 69 (io69) on rt2880-pinmux
[ 0.070000] pinctrl core: registered pin 70 (io70) on rt2880-pinmux
[ 0.070000] pinctrl core: registered pin 71 (io71) on rt2880-pinmux
[ 0.070000] pinctrl core: registered pin 72 (io72) on rt2880-pinmux
[ 0.070000] pinctrl core: add 5 pinmux maps
[ 0.070000] rt2880-pinmux pinctrl: found group selector 11 for wled
[ 0.070000] rt2880-pinmux pinctrl: found group selector 13 for pa
[ 0.070000] rt2880-pinmux pinctrl: found group selector 0 for i2c
[ 0.070000] rt2880-pinmux pinctrl: found group selector 4 for wdt
[ 0.070000] rt2880-pinmux pinctrl: found group selector 1 for uartf
[ 0.070000] rt2880-pinmux pinctrl: request pin 72 (io72) for pinctrl
[ 0.070000] rt2880-pinmux pinctrl: wled(11),gpio(0) = a311d
[ 0.080000] rt2880-pinmux pinctrl: request pin 18 (io18) for pinctrl
[ 0.080000] rt2880-pinmux pinctrl: request pin 19 (io19) for pinctrl
[ 0.080000] rt2880-pinmux pinctrl: request pin 20 (io20) for pinctrl
[ 0.080000] rt2880-pinmux pinctrl: request pin 21 (io21) for pinctrl
[ 0.080000] rt2880-pinmux pinctrl: pa(13),gpio(0) = 1a311d
[ 0.080000] rt2880-pinmux pinctrl: request pin 1 (io1) for pinctrl
[ 0.080000] rt2880-pinmux pinctrl: request pin 2 (io2) for pinctrl
[ 0.080000] rt2880-pinmux pinctrl: i2c(0),gpio(0) = 1a311d
[ 0.090000] rt2880-pinmux pinctrl: request pin 17 (io17) for pinctrl
[ 0.090000] rt2880-pinmux pinctrl: wdt(4),gpio(0) = 5a311d
[ 0.090000] rt2880-pinmux pinctrl: request pin 7 (io7) for pinctrl
[ 0.090000] rt2880-pinmux pinctrl: request pin 8 (io8) for pinctrl
[ 0.090000] rt2880-pinmux pinctrl: request pin 9 (io9) for pinctrl
[ 0.090000] rt2880-pinmux pinctrl: request pin 10 (io10) for pinctrl
[ 0.090000] rt2880-pinmux pinctrl: request pin 11 (io11) for pinctrl
[ 0.090000] rt2880-pinmux pinctrl: request pin 12 (io12) for pinctrl
[ 0.090000] rt2880-pinmux pinctrl: request pin 13 (io13) for pinctrl
[ 0.090000] rt2880-pinmux pinctrl: request pin 14 (io14) for pinctrl
[ 0.090000] rt2880-pinmux pinctrl: uartf(1),gpio(0) = 5a311d
[ 0.100000] rt2880-pinmux pinctrl: failed to lookup the sleep state
[ 0.100000] rt2880_gpio 10000600.gpio: registering 24 gpios
[ 0.110000] rt2880_gpio 10000600.gpio: registering 24 irq handlers
[ 0.110000] rt2880_gpio 10000660.gpio: registering 32 gpios
[ 0.120000] rt2880_gpio 10000660.gpio: registering 32 irq handlers
[ 0.120000] rt2880_gpio 10000688.gpio: registering 1 gpios
[ 0.130000] rt2880_gpio 10000688.gpio: registering 1 irq handlers
[ 0.130000] Switched to clocksource systick
[ 0.140000] NET: Registered protocol family 2
[ 0.140000] TCP established hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.160000] TCP bind hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.160000] TCP: Hash tables configured (established 2048 bind 2048)
[ 0.180000] TCP: reno registered
[ 0.190000] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 0.200000] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 0.210000] NET: Registered protocol family 1
[ 0.220000] PCI: CLS 0 bytes, default 32
[ 0.220000] rt-timer 10000100.timer: maximum frequency is 2441Hz
[ 0.240000] alarmtimer alarmtimer: no of_node; not parsing pinctrl DT
[ 0.240000] futex hash table entries: 256 (order: -1, 3072 bytes)
[ 0.260000] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.260000] jffs2: version 2.2 (NAND) (SUMMARY) (LZMA) (RTIME) (CMODE_PRIORITY) (c) 2001-2006 Red Hat, Inc.
[ 0.290000] msgmni has been set to 500
[ 0.290000] io scheduler noop registered
[ 0.300000] io scheduler deadline registered (default)
[ 0.310000] drivers/phy/phy-ralink-usb.c:ralink_usb_phy_probe[147]
[ 0.330000] drivers/phy/phy-ralink-usb.c:ralink_usb_phy_probe[161]
[ 0.330000] Serial: 8250/16550 driver, 2 ports, IRQ sharing disabled
[ 0.350000] serial8250 serial8250: no of_node; not parsing pinctrl DT
[ 0.350000] pinctrl core: add 1 pinmux maps
[ 0.350000] rt2880-pinmux pinctrl: found group selector 1 for uartf
[ 0.350000] rt2880-pinmux pinctrl: request pin 7 (io7) for 10000500.uart
[ 0.350000] rt2880-pinmux pinctrl: pin io7 already requested by pinctrl; cannot claim for 10000500.uart
[ 0.370000] rt2880-pinmux pinctrl: pin-7 (10000500.uart) status -22
[ 0.380000] rt2880-pinmux pinctrl: could not request pin 7 (io7) from group uartf on device rt2880-pinmux
[ 0.400000] of_serial 10000500.uart: Error applying setting, reverse things back
[ 0.420000] 10000500.uart: ttyS0 at MMIO 0x10000500 (irq = 13, base_baud = 2500000) is a 16550A
[ 0.440000] pinctrl core: add 1 pinmux maps
[ 0.440000] rt2880-pinmux pinctrl: found group selector 3 for uartlite
[ 0.440000] rt2880-pinmux pinctrl: request pin 15 (io15) for 10000c00.uartlite
[ 0.440000] rt2880-pinmux pinctrl: request pin 16 (io16) for 10000c00.uartlite
[ 0.440000] rt2880-pinmux pinctrl: uartlite(3),uartlite(10) = 5a311d
[ 0.440000] console [ttyS1] disabled
[ 0.460000] 10000c00.uartlite: ttyS1 at MMIO 0x10000c00 (irq = 20, base_baud = 2500000) is a 16550A
[ 0.460000] console [ttyS1] enabled
[ 0.490000] bootconsole [early0] disabled
..............................省略无关信息..............................
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soso90soso 2017-11-23
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我已经实现，为了方便其他人查找，弄了Netouter开发板，已经打包整个镜像～～～
夜晓码农 2017-07-20
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看了输出是GPIO7被占用了
我也遇到过一次，后面发现是自己对uartf进行了两次配置。后面去掉其中一次就不报
.....
rt2880-pinmux pinctrl: pin io7 already requested by pinctrl; cannot claim for 10000500.uart
.....
之类的错误了。
虽然不报错，但是扩展串口还是不能，后面查看模组电路图发现，使用I2S接口，所以将uartf配置修改为
"i2s uartf"后，就正常了。
关于第二个串口不能用，需要参考一下电路图，看到底是引出了哪个针脚，很多的都是引出了GPIO #7，#8，#9，#10
所以百度出很多这种引脚的dts配置，但是如果引出的不是这个针脚，通常都不顶用
帕奇洛 2016-02-29
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已经改用其他方案
帕奇洛 2015-09-28
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CTS 一直高电平，然后其他全部低电平。完全就是没有信号输出
soso90soso 2015-09-27
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有有什么现象。这样配还不通么？我看你配了i2s。这个调试怎么样
帕奇洛 2015-09-06
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再贴上dts，
/ {
#address-cells = <1>;
#size-cells = <1>;
compatible = "ralink,mtk7620a-soc";
cpus {
cpu@0 {
compatible = "mips,mips24KEc";
};
};
chosen {
bootargs = "console=ttyS0,57600";
};
cpuintc: cpuintc@0 {
#address-cells = <0>;
#interrupt-cells = <1>;
interrupt-controller;
compatible = "mti,cpu-interrupt-controller";
};
palmbus@10000000 {
compatible = "palmbus";
reg = <0x10000000 0x200000>;
ranges = <0x0 0x10000000 0x1FFFFF>;
#address-cells = <1>;
#size-cells = <1>;
sysc@0 {
compatible = "ralink,mt7620a-sysc", "ralink,rt3050-sysc";
reg = <0x0 0x100>;
};
timer@100 {
compatible = "ralink,mt7620a-timer", "ralink,rt2880-timer";
reg = <0x100 0x20>;
interrupt-parent = <&intc>;
interrupts = <1>;
};
watchdog@120 {
compatible = "ralink,mt7620a-wdt", "ralink,rt2880-wdt";
reg = <0x120 0x10>;
resets = <&rstctrl 8>;
reset-names = "wdt";
interrupt-parent = <&intc>;
interrupts = <1>;
};
intc: intc@200 {
compatible = "ralink,mt7620a-intc", "ralink,rt2880-intc";
reg = <0x200 0x100>;
resets = <&rstctrl 19>;
reset-names = "intc";
interrupt-controller;
#interrupt-cells = <1>;
interrupt-parent = <&cpuintc>;
interrupts = <2>;
};
memc@300 {
compatible = "ralink,mt7620a-memc", "ralink,rt3050-memc";
reg = <0x300 0x100>;
resets = <&rstctrl 20>;
reset-names = "mc";
interrupt-parent = <&intc>;
interrupts = <3>;
};
uart@500 {
compatible = "ralink,mt7620a-uart", "ralink,rt2880-uart", "ns16550a";
reg = <0x500 0x100>;
resets = <&rstctrl 12>;
reset-names = "uart";
interrupt-parent = <&intc>;
interrupts = <5>;
reg-shift = <2>;
status = "disabled";
pinctrl-names = "default";
pinctrl-0 = <&uartf_pins>;
};
gpio0: gpio@600 {
compatible = "ralink,mt7620a-gpio", "ralink,rt2880-gpio";
reg = <0x600 0x34>;
resets = <&rstctrl 13>;
reset-names = "pio";
interrupt-parent = <&intc>;
interrupts = <6>;
gpio-controller;
#gpio-cells = <2>;
ralink,gpio-base = <0>;
ralink,num-gpios = <24>;
ralink,register-map = [ 00 04 08 0c
20 24 28 2c
30 34 ];
};
gpio1: gpio@638 {
compatible = "ralink,mt7620a-gpio", "ralink,rt2880-gpio";
reg = <0x638 0x24>;
interrupt-parent = <&intc>;
interrupts = <6>;
gpio-controller;
#gpio-cells = <2>;
ralink,gpio-base = <24>;
ralink,num-gpios = <16>;
ralink,register-map = [ 00 04 08 0c
10 14 18 1c
20 24 ];
status = "disabled";
};
gpio2: gpio@660 {
compatible = "ralink,mt7620a-gpio", "ralink,rt2880-gpio";
reg = <0x660 0x24>;
interrupt-parent = <&intc>;
interrupts = <6>;
gpio-controller;
#gpio-cells = <2>;
ralink,gpio-base = <40>;
ralink,num-gpios = <32>;
ralink,register-map = [ 00 04 08 0c
10 14 18 1c
20 24 ];
status = "disabled";
};
gpio3: gpio@688 {
compatible = "ralink,mt7620a-gpio", "ralink,rt2880-gpio";
reg = <0x688 0x24>;
interrupt-parent = <&intc>;
interrupts = <6>;
gpio-controller;
#gpio-cells = <2>;
ralink,gpio-base = <72>;
ralink,num-gpios = <1>;
ralink,register-map = [ 00 04 08 0c
10 14 18 1c
20 24 ];
status = "disabled";
};
i2c@900 {
compatible = "link,mt7620a-i2c", "ralink,rt2880-i2c";
reg = <0x900 0x100>;
resets = <&rstctrl 16>;
reset-names = "i2c";
#address-cells = <1>;
#size-cells = <0>;
status = "disabled";
pinctrl-names = "default";
pinctrl-0 = <&i2c_pins>;
};
i2s@a00 {
compatible = "ralink,mt7620a-i2s";
reg = <0xa00 0x100>;
resets = <&rstctrl 17>;
reset-names = "i2s";
interrupt-parent = <&intc>;
interrupts = <10>;
dmas = <&gdma 4>,
<&gdma 5>;
dma-names = "tx", "rx";
status = "disabled";
};
spi@b00 {
compatible = "ralink,mt7620a-spi", "ralink,rt2880-spi";
reg = <0xb00 0x100>;
resets = <&rstctrl 18>;
reset-names = "spi";
#address-cells = <1>;
#size-cells = <1>;
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&spi_pins>;
};
uartlite@c00 {
compatible = "ralink,mt7620a-uart", "ralink,rt2880-uart", "ns16550a";
reg = <0xc00 0x100>;
resets = <&rstctrl 19>;
reset-names = "uartl";
interrupt-parent = <&intc>;
interrupts = <12>;
reg-shift = <2>;
pinctrl-names = "default";
pinctrl-0 = <&uartlite_pins>;
};
systick@d00 {
compatible = "ralink,mt7620a-systick", "ralink,cevt-systick";
reg = <0xd00 0x10>;
resets = <&rstctrl 28>;
reset-names = "intc";
interrupt-parent = <&cpuintc>;
interrupts = <7>;
};
pcm@2000 {
compatible = "ralink,mt7620a-pcm";
reg = <0x2000 0x800>;
resets = <&rstctrl 11>;
reset-names = "pcm";
interrupt-parent = <&intc>;
interrupts = <4>;
status = "disabled";
};
gdma: gdma@2800 {
compatible = "ralink,mt7620a-gdma", "ralink,rt2880-gdma";
reg = <0x2800 0x800>;
resets = <&rstctrl 14>;
reset-names = "dma";
interrupt-parent = <&intc>;
interrupts = <7>;
#dma-cells = <1>;
#dma-channels = <16>;
#dma-requests = <16>;
status = "disabled";
};
};
pinctrl {
compatible = "ralink,rt2880-pinmux";
pinctrl-names = "default";
pinctrl-0 = <&state_default>;
state_default: pinctrl0 {
};
pcm_i2s_pins: pcm_i2s {
pcm_i2s {
ralink,group = "uartf";
ralink,function = "pcm i2s";
};
};
uartf_pins: uartfull{
uart{
ralink,group = "uartf";
ralink,function = "uartf";
};
};
uartf_gpio_pins: uartf_gpio {
uartf_gpio {
ralink,group = "uartf";
ralink,function = "gpio uartf";
};
};
spi_pins: spi {
spi {
ralink,group = "spi";
ralink,function = "spi";
};
};
i2c_pins: i2c {
i2c {
ralink,group = "i2c";
ralink,function = "i2c";
};
};
uartlite_pins: uartlite {
uart {
ralink,group = "uartlite";
ralink,function = "uartlite";
};
};
mdio_pins: mdio {
mdio {
ralink,group = "mdio";
ralink,function = "mdio";
};
};
ephy_pins: ephy {
ephy {
ralink,group = "ephy";
ralink,function = "ephy";
};
};
wled_pins: wled {
wled {
ralink,group = "wled";
ralink,function = "wled";
};
};
rgmii1_pins: rgmii1 {
rgmii1 {
ralink,group = "rgmii1";
ralink,function = "rgmii1";
};
};
rgmii2_pins: rgmii2 {
rgmii2 {
ralink,group = "rgmii2";
ralink,function = "rgmii2";
};
};
pcie_pins: pcie {
pcie {
ralink,group = "pcie";
ralink,function = "pcie rst";
};
};
};
rstctrl: rstctrl {
compatible = "ralink,mt7620a-reset", "ralink,rt2880-reset";
#reset-cells = <1>;
};
usbphy: usbphy {
compatible = "ralink,mt7620a-usbphy";
#phy-cells = <1>;
resets = <&rstctrl 22 &rstctrl 25>;
reset-names = "host", "device";
};
ethernet@10100000 {
compatible = "ralink,mt7620a-eth";
reg = <0x10100000 10000>;
#address-cells = <1>;
#size-cells = <0>;
interrupt-parent = <&cpuintc>;
interrupts = <5>;
resets = <&rstctrl 21 &rstctrl 23>;
reset-names = "fe", "esw";
port@4 {
compatible = "ralink,mt7620a-gsw-port", "ralink,eth-port";
reg = <4>;
status = "disabled";
};
port@5 {
compatible = "ralink,mt7620a-gsw-port", "ralink,eth-port";
reg = <5>;
status = "disabled";
};
mdio-bus {
#address-cells = <1>;
#size-cells = <0>;
status = "disabled";
};
};
gsw@10110000 {
compatible = "ralink,mt7620a-gsw";
reg = <0x10110000 8000>;
resets = <&rstctrl 23>;
reset-names = "esw";
interrupt-parent = <&intc>;
interrupts = <17>;
};
sdhci@10130000 {
compatible = "ralink,mt7620-sdhci";
reg = <0x10130000 4000>;
interrupt-parent = <&intc>;
interrupts = <14>;
status = "disabled";
};
ehci@101c0000 {
compatible = "ralink,rt3xxx-ehci";
reg = <0x101c0000 0x1000>;
interrupt-parent = <&intc>;
interrupts = <18>;
phys = <&usbphy 1>;
phy-names = "usb";
status = "disabled";
};
ohci@101c1000 {
compatible = "ralink,rt3xxx-ohci";
reg = <0x101c1000 0x1000>;
interrupt-parent = <&intc>;
interrupts = <18>;
phys = <&usbphy 1>;
phy-names = "usb";
status = "disabled";
};
pcie@10140000 {
compatible = "mediatek,mt7620-pci";
reg = <0x10140000 0x100
0x10142000 0x100>;
#address-cells = <3>;
#size-cells = <2>;
resets = <&rstctrl 26>;
reset-names = "pcie0";
interrupt-parent = <&cpuintc>;
interrupts = <4>;
pinctrl-names = "default";
pinctrl-0 = <&pcie_pins>;
device_type = "pci";
bus-range = <0 255>;
ranges = <
0x02000000 0 0x00000000 0x20000000 0 0x10000000 /* pci memory */
0x01000000 0 0x00000000 0x10160000 0 0x00010000 /* io space */
>;
status = "disabled";
pcie-bridge {
reg = <0x0000 0 0 0 0>;
#address-cells = <3>;
#size-cells = <2>;
device_type = "pci";
};
};
wmac@10180000 {
compatible = "ralink,rt7620-wmac", "ralink,rt2880-wmac";
reg = <0x10180000 40000>;
interrupt-parent = <&cpuintc>;
interrupts = <6>;
ralink,eeprom = "soc_wmac.eeprom";
};
};
