net: ethernet: renesas: rcar_gen4_ptp: Prepare for shared register layout

All known R-Car Gen4 SoC share the same register layout, rename the
R-Car S4 specific identifiers so they can be shared with the upcoming
R-Car V4H support.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/ethernet/renesas/rcar_gen4_ptp.c

@@ -14,7 +14,7 @@
 #include "rcar_gen4_ptp.h"
 #define ptp_to_priv(ptp)	container_of(ptp, struct rcar_gen4_ptp_private, info)
 
-static const struct rcar_gen4_ptp_reg_offset s4_offs = {
+static const struct rcar_gen4_ptp_reg_offset gen4_offs = {
 	.enable = PTPTMEC,
 	.disable = PTPTMDC,
 	.increment = PTPTIVC0,
@@ -133,10 +133,10 @@ static struct ptp_clock_info rcar_gen4_ptp_info = {
 static int rcar_gen4_ptp_set_offs(struct rcar_gen4_ptp_private *ptp_priv,
 				  enum rcar_gen4_ptp_reg_layout layout)
 {
-	if (layout != RCAR_GEN4_PTP_REG_LAYOUT_S4)
+	if (layout != RCAR_GEN4_PTP_REG_LAYOUT)
 		return -EINVAL;
 
-	ptp_priv->offs = &s4_offs;
+	ptp_priv->offs = &gen4_offs;
 
 	return 0;
 }

drivers/net/ethernet/renesas/rcar_gen4_ptp.h

@@ -14,7 +14,7 @@
 #define RCAR_GEN4_GPTP_OFFSET_S4	0x00018000
 
 enum rcar_gen4_ptp_reg_layout {
-	RCAR_GEN4_PTP_REG_LAYOUT_S4
+	RCAR_GEN4_PTP_REG_LAYOUT
 };
 
 /* driver's definitions */
@@ -27,7 +27,7 @@ enum rcar_gen4_ptp_reg_layout {
 
 #define PTPRO				0
 
-enum rcar_gen4_ptp_reg_s4 {
+enum rcar_gen4_ptp_reg {
 	PTPTMEC		= PTPRO + 0x0010,
 	PTPTMDC		= PTPRO + 0x0014,
 	PTPTIVC0	= PTPRO + 0x0020,

drivers/net/ethernet/renesas/rswitch.c

@@ -1828,7 +1828,7 @@ static int rswitch_init(struct rswitch_private *priv)
 
 	rswitch_fwd_init(priv);
 
-	err = rcar_gen4_ptp_register(priv->ptp_priv, RCAR_GEN4_PTP_REG_LAYOUT_S4,
+	err = rcar_gen4_ptp_register(priv->ptp_priv, RCAR_GEN4_PTP_REG_LAYOUT,
 				     RCAR_GEN4_PTP_CLOCK_S4);
 	if (err < 0)
 		goto err_ptp_register;