Open Networking Hardware Diagnostic Guide November 2022

The CPU GPIO aligns the map in Linux to /sys/class/gpio entries, which are manipulated through the standard read/write interfaces. There is chip numbering to support multiple GPIO chips, or chips at an offset. For devices such as the complex programmable logic device (CPLD) or field-programmable gate arrays (FPGA), gpiotool accesses those devices to drive the GPIO lines using the standard bus interfaces such as i2c, mem, or pci.

CLI options

DellEmc Diag - GPIO Tool
version 1.4, x.xx.x.x-x
build, 2022/05/20,

Syntax: gpiotool <option>
 Show the help-text:=
      gpiotool --h                                             (or)
      gpiotool -h
 List available gpio chips and pins:=
      gpiotool --list                                          (or)
      gpiotool -l
 Set GPIO pin:=
      gpiotool --set [--chip=<chip>] --pin=<pin> --val=<value> (or)
      gpiotool -s [-c <chip>] -H <pin> -V <value>
 Get GPIO pins value:=
      gpiotool --get [--chip=<chip>] [--pin=<pin>]             (or)
      gpiotool -g [-c <chip>] [-H <pin>]
 Execute repeatedly command by count:=
      gpiotool --iteration=max/<count> [option1] [option2]...  (or)
      gpiotool -I max/<count> [option1] [option2]...
Usage:=
      -h, --h           Show the help text
      -l, --list        List the understood TLV codes and names
      -s, --set         Set operation
      -g, --get         Get operation
      -c, --chip=       GPIO chip
      -I, --iteration=  Iteration command execution
      -H, --pin=        GPIO pin number
      -V, --val=        Value to be set

Output

list output

root@dell-diag-os:~# gpiotool --list
Chip 0  Core Gpio  bits: 60 CORE gpiochip196
=========================================
Bit             Name    Dir  AC  Value
=========================================
15        SATA_GP0      IN   LOW    0
16        SATA_LEDN     OUT  LOW    0
17        SATA3_GP0     IN   LOW    0
19        FLEX_CLK_SE0  IN   LOW    0
20        FLEX_CLK_SE1  IN   LOW    0
32           GPIO_SUS1  IN   LOW    0
33           GPIO_SUS2  OUT  LOW    0
34         CPU_RESET_B  OUT  LOW    0
36          PMU_SUSCLK  OUT  LOW    0
37    PMU_SLP_DDRVTT_B  IN   LOW    0
38       PMU_SLP_LAN_B  IN   LOW    0
39          PMU_WAKE_B  OUT  LOW    0
40        PMU_PWRBTN_B  IN   LOW    0
49          GBE_SDP0_1  IN   LOW    0
50            GBE_LED0  IN   LOW    0
51            GBE_LED1  IN   LOW    0
52            GBE_LED2  IN   LOW    0
53            GBE_LED3  IN   LOW    0
54           NCSI_RXD1  OUT  LOW    0
55   GBE_MDIO0_I2C_CLK  OUT  LOW    0
58  GBE_MDIO1_I2C_DATA  IN   LOW    0
59           JTAG_TRST  OUT  LOW    0
root@dell-diag-os:~#

get output

root@dell-diag-os:~# gpiotool --get --pin=1
Chip 0  Core Gpio  bits: 60 CORE gpiochip196
===================================
Bit             Name    Dir  Value
===================================

set output

root@dellemc-diag-os:~# gpiotool --set --pin=1 --val=1