LED Support for PCA955x I2C chips

modulename: leds-pca955x.ko

configname: CONFIG_LEDS_PCA955X

Linux Kernel Configuration
└─>Device Drivers
└─>LED Support
└─>LED Support for PCA955x I2C chips
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
This option enables support for LEDs connected to PCA955x
LED driver chips accessed via the I2C bus. Supported
devices include PCA9550, PCA9551, PCA9552, and PCA9553.

source code: