hardware

i2c i2c protocol

i2cdetect i2cget i2cset i2ctransfer

i2c path in file system /sys/class/i2c-dev

smbus smbus protocol

pmbus

eeprom

fru

SCM

DCSCI

gpio gpiodetect gpioinfo gpioset gpioget

/sys/class/gpio

devmem

adc

spi single/dual/quad/octal spi