From: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>

There are different switches available on both the RZ/G3S SMARC Module and
RZ SMARC Carrier II boards. These switches are used to route different SoC
signals to different parts available on board.

These switches are described in device trees through macros. These macros
are set accordingly such that the resulted compiled dtb to describe the
on-board switches states.

Based on the SW_CONFIG3 switch state (populated on the module board), the
SCIF3 SoC interface is routed or not to an U(S)ART pin header available on
the carrier board. As the SCIF3 is accessible through the carrier board,
the device tree enables it in the carrier DTS. To be able to cope with
these type of configurations, add a header file where all the on-board
switches can be described and shared accordingly between module and carrier
board.

Commit prepares the code to enable SCIF3 on the RZ/G3S carrier device
tree.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---

Changes in v2:
- none

 .../boot/dts/renesas/rzg3s-smarc-som.dtsi     | 20 +-----------
 .../boot/dts/renesas/rzg3s-smarc-switches.h   | 32 +++++++++++++++++++
 2 files changed, 33 insertions(+), 19 deletions(-)
 create mode 100644 arch/arm64/boot/dts/renesas/rzg3s-smarc-switches.h

diff --git a/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi b/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
index 55c72c8a0735..5c88e130c89e 100644
--- a/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
@@ -9,25 +9,7 @@
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/pinctrl/rzg2l-pinctrl.h>
 
-/*
- * On-board switches' states:
- * @SW_OFF: switch's state is OFF
- * @SW_ON:  switch's state is ON
- */
-#define SW_OFF		0
-#define SW_ON		1
-
-/*
- * SW_CONFIG[x] switches' states:
- * @SW_CONFIG2:
- *	SW_OFF - SD0 is connected to eMMC
- *	SW_ON  - SD0 is connected to uSD0 card
- * @SW_CONFIG3:
- *	SW_OFF - SD2 is connected to SoC
- *	SW_ON  - SCIF1, SSI0, IRQ0, IRQ1 connected to SoC
- */
-#define SW_CONFIG2	SW_OFF
-#define SW_CONFIG3	SW_ON
+#include "rzg3s-smarc-switches.h"
 
 / {
 	compatible = "renesas,rzg3s-smarcm", "renesas,r9a08g045s33", "renesas,r9a08g045";
diff --git a/arch/arm64/boot/dts/renesas/rzg3s-smarc-switches.h b/arch/arm64/boot/dts/renesas/rzg3s-smarc-switches.h
new file mode 100644
index 000000000000..e2d9b953f627
--- /dev/null
+++ b/arch/arm64/boot/dts/renesas/rzg3s-smarc-switches.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * On-board switches for the Renesas RZ/G3S SMARC Module and RZ SMARC Carrier II
+ * boards.
+ *
+ * Copyright (C) 2024 Renesas Electronics Corp.
+ */
+
+#ifndef __RZG3S_SMARC_SWITCHES__
+#define __RZG3S_SMARC_SWITCHES__
+
+/*
+ * On-board switches' states:
+ * @SW_OFF: switch's state is OFF
+ * @SW_ON:  switch's state is ON
+ */
+#define SW_OFF		0
+#define SW_ON		1
+
+/*
+ * SW_CONFIG[x] switches' states:
+ * @SW_CONFIG2:
+ *	SW_OFF - SD0 is connected to eMMC
+ *	SW_ON  - SD0 is connected to uSD0 card
+ * @SW_CONFIG3:
+ *	SW_OFF - SD2 is connected to SoC
+ *	SW_ON  - SCIF3, SSI3, IRQ0, IRQ1 connected to SoC
+ */
+#define SW_CONFIG2	SW_OFF
+#define SW_CONFIG3	SW_ON
+
+#endif /* __RZG3S_SMARC_SWITCHES__ */
-- 
2.39.2