serial: sh-sci: Remove manual break debouncing

The sh-sci driver implements manual break debouncing for a few SH
platforms by reading the value of the RX pin port register. This feature
is optional and the driver considers all negative or zero values of the
platform data port_reg field as invalid. As the four platforms that set
the field to a register address all use an address higher than
0x7fffffff, the driver will always consider the value as invalid and
never perform debouncing. The feature is unused, remove it.

Debouncing could be implemented properly in the future using the pinctrl
and GPIO APIs if desired.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 0 insertions, 5 deletions

diff --git a/include/linux/serial_sci.h b/include/linux/serial_sci.h
index 1a894c47bfc0..b4419931bf4c 100644
--- a/include/linux/serial_sci.h
+++ b/include/linux/serial_sci.h
@@ -9,8 +9,6 @@
  * Generic header for SuperH (H)SCI(F) (used by sh/sh64 and related parts)
  */
 
-#define SCIx_NOT_SUPPORTED	(-1)
-
 /* Serial Control Register (@ = not supported by all parts) */
 #define SCSCR_TIE	BIT(7)	/* Transmit Interrupt Enable */
 #define SCSCR_RIE	BIT(6)	/* Receive Interrupt Enable */
@@ -41,8 +39,6 @@ enum {
 	SCIx_NR_REGTYPES,
 };
 
-struct device;
-
 struct plat_sci_port_ops {
 	void (*init_pins)(struct uart_port *, unsigned int cflag);
 };
@@ -66,7 +62,6 @@ struct plat_sci_port {
 	/*
 	 * Platform overrides if necessary, defaults otherwise.
 	 */
-	int		port_reg;
 	unsigned char	regshift;
 	unsigned char	regtype;