Semtech SX150x I2C GPIO expander

modulename: gpio-sx150x.ko

configname: CONFIG_GPIO_SX150X

Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>I2C support
└─>Semtech SX150x I2C GPIO expander
In linux kernel since version 2.6.36 (release Date: 2010-10-20)  
Say yes here to provide support for Semtech SX150-series I2C
GPIO expanders. Compatible models include:

8 bits: sx1508q
16 bits: sx1509q

source code: