Qualcomm SSBI PMIC pin controller driver

modulename: pinctrl-ssbi-gpio.ko

and/or

pinctrl-ssbi-mpp.ko

configname: CONFIG_PINCTRL_QCOM_SSBI_PMIC

Linux Kernel Configuration
└─>Device Drivers
└─>Pin controllers
└─>Device Tree and Open Firmware support
└─>Qualcomm SSBI PMIC pin controller driver
In linux kernel since version 3.10 (release Date: 2013-06-30)  
This is the pinctrl, pinmux, pinconf and gpiolib driver for the
Qualcomm GPIO and MPP blocks found in the Qualcomm PMIC's chips,
which are using SSBI for communication with SoC. Example PMIC's
devices are pm8058 and pm8921.

source code: