Adds a PWM driver for PWM chip present in SiFive's HiFive Unleashed SoC.
Signed-off-by: NWesley W. Terpstra <wesley@sifive.com>
[Atish: Various fixes and code cleanup]
Signed-off-by: NAtish Patra <atish.patra@wdc.com>
Signed-off-by: NYash Shah <yash.shah@sifive.com>
Reviewed-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: NThierry Reding <thierry.reding@gmail.com>