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The FPC202 dual port controller has 20 regular GPIO lines and 8 special GPIO lines with LED features. Each one of these "LED GPIOs" can output PWM and blink signals. Describe these special-purpose GPIO lines. Acked-by: Conor Dooley <conor.dooley@microchip.com> Signed-off-by: Romain Gantois <romain.gantois@bootlin.com> Link: https://patch.msgid.link/20260331-fpc202-leds-v3-2-74b173537d42@bootlin.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>