The regmap core supports different endian modes for devices. This patch
convert to direct regmap API usage, preparing to support big endianness
for LS1 SoC.

Using the regmap framework it will be easy to support devices that only
differ in endianness with the same device driver.
Signed-off-by: NXiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: NThierry Reding <thierry.reding@gmail.com>

This patch intends to prepare for converting to direct regmap API usage.
Signed-off-by: NXiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: NThierry Reding <thierry.reding@gmail.com>

The implementation of .config(), .enable() and .disable() operations in this
driver may sleep, thus set pwm_chip can_sleep flag.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Acked-by: NXiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: NThierry Reding <thierry.reding@gmail.com>

The FTM PWM device can be found on Vybrid VF610 Tower and
Layerscape LS-1 SoCs.
Signed-off-by: NXiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: NAlison Wang <b18965@freescale.com>
Signed-off-by: NJingchang Lu <b35083@freescale.com>
Reviewed-by: NSascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: NYuan Yao <yao.yuan@freescale.com>
Signed-off-by: NThierry Reding <thierry.reding@gmail.com>