This adds the driver for PCA9685 I2C-based PWM chip, and provides
basic PWM functionality.
Change-Id: I8c711d9b703fdaf5ccb23657e07495a95cbe16ee
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
This adds the public APIs for PWM drivers. Also, this adds a Kconfig
and an empty makefile for drivers to extend.
Change-Id: I1cc0c908b6f5aeeb678b6368640d5b9a1cc9751d
Signed-off-by: Daniel Leung <daniel.leung@intel.com>