Specifications

Conguration le format
GPIOs are separated into groups within the conguration le, such as Core GPIOs and Suspend GPIOs (if they use dierent power wells for
sleep operations).
Any line starting with a # is a comment. ===== is the separator between groups.
A group starts with a header using | separators and:
• # of bits dened in the GPIO interface (a hardware denition, not the number of bits being dened in the cong le.)
• A name for the bit group, such as Core GPIO or SUS GPIO.
• Group Type — CORE.
• Any bus used to access the GPIO. For the CPLD-based or FPGA-based GPIOs.
• The address to use to access the GPIO. For the CPLD-based or FPGA-based GPIOs.
• All the GPIOs are zero-based in a group. The 0 map is the oset to access /sys/class/gpio/gpio# in the sysfs.
Each bit is then dened on its own line separated with | and includes the bit number, name, direction, active level, and default value.
#bits | Name | intf | bus | addr | 0-map
60 | Core Gpio | CORE | - | - | 196
# Bit | Name | Direction | 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
i2ctool
The i2ctool allows for scanning, reading, and writing of the I2c bus devices.
To read and write to devices on the i2c bus, use the i2ctool. The i2ctool also scans the i2c busses and reports what devices are
found. The scan reads address 0x0 from all the devices in the address range of 0x0 to 0x7f on all
i2c busses present. The i2ctool does
not automatically traverse MUXes along the i2c bus. Other tools use this tool to read i2c device information and pass the results back
through a named pipe.
Tests
To test, the i2ctool has a conguration le that lists all the devices on the busses. The tool runs through the list and tries to reach the
devices. The
i2ctool reports when a device is not returning data.
Dell EMC DiagOS tools
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