arm64: dts: renesas: salvator-xs: Factor out USB ch3 parts

Move the parts related to the fourth USB2 interface on Salvator-XS
boards to salvator-xs.dtsi, to avoid future duplication of board
descriptions.

As this interface is not present on all SoCs that can be found on
Salvator-X(S), but only on R-Car H3 ES2.0+, its descriptions are
protected by the preprocessor symbol SOC_HAS_USB2_CH3, defined in
r8a77951.dtsi, and undefined in r8a77950.dtsi.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://lore.kernel.org/r/411df1adfd64ee82e5a0d1603df85d657fd4f8c0.1623087028.git.geert+renesas@glider.be

arch/arm64/boot/dts/renesas/r8a77950.dtsi

@@ -7,6 +7,8 @@
 
 #include "r8a77951.dtsi"
 
+#undef SOC_HAS_USB2_CH3
+
 &audma0 {
 	iommus = <&ipmmu_mp1 0>, <&ipmmu_mp1 1>,
 	       <&ipmmu_mp1 2>, <&ipmmu_mp1 3>,

arch/arm64/boot/dts/renesas/r8a77951-salvator-xs.dts

@@ -47,44 +47,3 @@ &du {
 	clock-names = "du.0", "du.1", "du.2", "du.3",
 		      "dclkin.0", "dclkin.1", "dclkin.2", "dclkin.3";
 };
-
-&ehci3 {
-	dr_mode = "otg";
-	status = "okay";
-};
-
-&hsusb3 {
-	dr_mode = "otg";
-	status = "okay";
-};
-
-&ohci3 {
-	dr_mode = "otg";
-	status = "okay";
-};
-
-&pfc {
-	/*
-	 * - On Salvator-X[S], GP6_3[01] are connected to ADV7482 as irq pins
-	 *   (when SW31 is the default setting on Salvator-XS).
-	 * - If SW31 is the default setting, you cannot use USB2.0 ch3 on
-	 *   r8a77951 with Salvator-XS.
-	 *   Hence the SW31 setting must be changed like 2) below.
-	 *   1) Default setting of SW31: ON-ON-OFF-OFF-OFF-OFF:
-	 *	- Connect GP6_3[01] to ADV7842.
-	 *   2) Changed setting of SW31: OFF-OFF-ON-ON-ON-ON:
-	 *	- Connect GP6_3[01] to BD082065 (USB2.0 ch3's host power).
-	 *	- Connect GP6_{04,21} to ADV7842.
-	 */
-	usb2_ch3_pins: usb2_ch3 {
-		groups = "usb2_ch3";
-		function = "usb2_ch3";
-	};
-};
-
-&usb2_phy3 {
-	pinctrl-0 = <&usb2_ch3_pins>;
-	pinctrl-names = "default";
-
-	status = "okay";
-};

arch/arm64/boot/dts/renesas/r8a77951.dtsi

@@ -14,6 +14,7 @@
 #define SOC_HAS_HDMI1
 #define SOC_HAS_SATA
 #define SOC_HAS_USB2_CH2
+#define SOC_HAS_USB2_CH3
 
 / {
 	compatible = "renesas,r8a7795";

arch/arm64/boot/dts/renesas/salvator-xs.dtsi

@@ -40,3 +40,46 @@ pcie-sata-switch-hog {
 
 /* SW12-7 must be set 'Off' (MD12 set to 1) which is not the default! */
 #endif /* SOC_HAS_SATA */
+
+#ifdef SOC_HAS_USB2_CH3
+&ehci3 {
+	dr_mode = "otg";
+	status = "okay";
+};
+
+&hsusb3 {
+	dr_mode = "otg";
+	status = "okay";
+};
+
+&ohci3 {
+	dr_mode = "otg";
+	status = "okay";
+};
+
+&pfc {
+	/*
+	 * - On Salvator-X[S], GP6_3[01] are connected to ADV7482 as irq pins
+	 *   (when SW31 is the default setting on Salvator-XS).
+	 * - If SW31 is the default setting, you cannot use USB2.0 ch3 on
+	 *   r8a77951 with Salvator-XS.
+	 *   Hence the SW31 setting must be changed like 2) below.
+	 *   1) Default setting of SW31: ON-ON-OFF-OFF-OFF-OFF:
+	 *	- Connect GP6_3[01] to ADV7842.
+	 *   2) Changed setting of SW31: OFF-OFF-ON-ON-ON-ON:
+	 *	- Connect GP6_3[01] to BD082065 (USB2.0 ch3's host power).
+	 *	- Connect GP6_{04,21} to ADV7842.
+	 */
+	usb2_ch3_pins: usb2_ch3 {
+		groups = "usb2_ch3";
+		function = "usb2_ch3";
+	};
+};
+
+&usb2_phy3 {
+	pinctrl-0 = <&usb2_ch3_pins>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
+#endif /* SOC_HAS_USB2_CH3 */