5748aa1e37
Changing the duty-cycle should not blindly override (and clear) the enable (EN) bit if it has already been set. For instance, a PWM backlight can be enabled and set to a specific intensity using two operations. The order of these operations should not matter. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Reviewed-by: Fabio Estevam <festevam@gmail.com>