CONFIG_PINCTRL_MCP23S08_I2C (not configurable)

modulename: pinctrl-mcp23s08_i2c.ko

configname: CONFIG_PINCTRL_MCP23S08_I2C

Linux Kernel Configuration
└─>Device Drivers
└─>Pin controllers
└─>PINCTRL_MCP23S08_I2C
In linux kernel since version 5.1 (release Date: 2019-05-05)  
source code:
drivers/pinctrl/pinctrl-mcp23s08_i2c.c

depends
CONFIG_PINCTRL