Qualcomm MSM GPIO v2

modulename: gpio-msm-v2.ko

configname: CONFIG_GPIO_MSM_V2

Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>Qualcomm MSM GPIO v2
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Say yes here to support the GPIO interface on ARM v7 based
Qualcomm MSM chips. Most of the pins on the MSM can be
selected for GPIO, and are controlled by this driver.

source code: