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。