SSB GPIO driver

configname: CONFIG_SSB_DRIVER_GPIO

Linux Kernel Configuration
└─>Device Drivers
└─>Sonics Silicon Backplane support
└─>GPIO Support
└─>SSB GPIO driver
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Driver to provide access to the GPIO pins on the bus.

If unsure, say N

selects
CONFIG_IRQ_DOMAIN