drivers: add Atmel SAM PWM driver

This patch adds basic support for the PWM devices available on the Atmel
SAM family. Beside enabling the driver, everything is selected through
the device tree, including enabling the PWM0 and PWM1 devices. Thus
CONFIG_PWM_0 and CONFIG_PWM_1 are ignored.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
7 files changed