怎么查看DTS设备树的节点

查看DTS设备树的节点
插上串口线，板子上电稳定运行以后，进入proc目录。在proc里面记录着系统信息
当前进程、当前设备树注册，文件系统，内存大小，CPU信息等）

[root@rk3288:/]# cd proc
[root@rk3288:/proc]# ls
1                  176                5                  driver
10                 18                 511                execdomains
11                 183                512                fb
12                 19                 522                filesystems
124                2                  557                fs
125                20                 558                interrupts
126                205                559                iomem
127                21                 560                ioports
128                218                584                irq
129                22                 590                kallsyms
13                 23                 593                key-users
130                24                 595                keys
131                25                 596                kmsg
132                26                 598                kpagecount
133                27                 6                  kpageflags
134                28                 7                  loadavg
135                29                 74                 locks
136                3                  75                 meminfo
137                30                 76                 misc
138                31                 77                 modules
14                 32                 78                 mounts
140                328                8                  net
141                33                 81                 pagetypeinfo
142                330                82                 partitions
143                337                83                 sched_debug
144                34                 84                 schedstat
145                35                 85                 scsi
146                36                 86                 self
147                361                87                 slabinfo
148                363                88                 softirqs
149                365                89                 stat
15                 366                9                  swaps
150                37                 90                 sys
151                370                91                 sysrq-trigger
152                378                asound             sysvipc
153                38                 bluetooth          thread-self
154                387                buddyinfo          timer_list
155                388                bus                timer_stats
156                389                cgroups            tty
157                39                 cmdline            uid
158                393                config.gz          uid_time_in_state
159                4                  consoles           uptime
16                 40                 cpu                version
160                41                 cpuinfo            vmallocinfo
161                42                 crypto             vmstat
162                43                 device-tree        zoneinfo
17                 44                 devices
173                499                diskstats`

在proc下，进入device-tree目录（cd device-tree）可以查看到系统的节点

[root@rk3288:/proc]# cd device-tree
[root@rk3288:/sys/firmware/devicetree/base]# ls
#address-cells                 oscillator
#size-cells                    pinctrl
__symbols__                    power-management@ff730000
adc-keys                       psci
aliases                        pwm@ff680000
amba                           pwm@ff680010
arm-pmu                        pwm@ff680020
backlight                      pwm@ff680030
bus_intmem@ff700000            qos@ffaa0000
chosen                         qos@ffaa0080
cif@ff950000                   qos@ffad0000
cif_isp@ff910000               qos@ffad0100
clock-controller@ff760000      qos@ffad0180
compatible                     qos@ffad0400
cpus                           qos@ffad0480
cypto-controller@ff8a0000      qos@ffad0500
ddr_timing                     qos@ffad0800
dfi                            qos@ffad0880
display-subsystem              qos@ffad0900
dmc                            qos@ffae0000
dp@ff970000                    qos@ffaf0000
dsi@ff960000                   qos@ffaf0080
dsi@ff964000                   reserved-memory
dwmmc@ff0c0000                 rga@ff920000
dwmmc@ff0d0000                 rockchip-suspend
dwmmc@ff0e0000                 saradc@ff100000
dwmmc@ff0f0000                 sdio-pwrseq
edp-panel                      sdmmc-regulator
efuse@ffb40000                 serial-number
ethernet@ff290000              serial@ff180000
external-gmac-clock            serial@ff190000
fiq-debugger                   serial@ff1b0000
gpio-keys                      serial@ff1c0000
gpu@ffa30000                   serial@ff690000
hdmi@ff980000                  sound
hevc-service@ff9c0000          sound@ff8b0000
i2c@ff140000                   spi@ff110000
i2c@ff150000                   spi@ff120000
i2c@ff160000                   spi@ff130000
i2c@ff170000                   sram@ff720000
i2c@ff650000                   syscon@ff740000
i2c@ff660000                   syscon@ff770000
i2s@ff890000                   syscon@ffac0000
iep@ff90000                    thermal-zones
interrupt-controller@ffc01000  timer
interrupt-parent               timer@ff6b0000
iommu@ff900800                 tsadc@ff280000
iommu@ff914000                 usb@ff500000
iommu@ff930300                 usb@ff520000
iommu@ff940300                 usb@ff540000
iommu@ff9a0800                 usb@ff580000
iommu@ff9c0440                 usb@ff5c0000
isp@ff910000                   vcc-3g-regulator
lvds-panel                     vcc-host-regulator
lvds@ff96c000                  vcc-lcd
memory                         vcc-phy-regulator
mipi-phy-tx1rx1@ff968000       vcc-wl
myleds                         vcc_5v-regulator
name                           vcc_host-regulator
nocp-core@ffac0400             vccadc-ref
nocp-gpu@ffac0800              video-codec@ff9a0000
nocp-peri@ffac0c00             vop@ff930000
nocp-vio0@ffac1400             vop@ff940000
nocp-vio1@ffac1800             vpu-service@ff9a0000
nocp-vio2@ffac1c00             vsys-regulator
nocp-vpu@ffac1000              watchdog@ff800000
opp-table1                     wireless-bluetooth
opp_table0                     wireless-wlan

上面的节点中，myleds这个节点就是自己命名定义的节点。