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arm64: dts: renesas: rzg3s-smarc-switches: Add a header to describe different switches

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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.

The SCIF1 depends on the state of the SW_CONFIG3 and SW_OPT_MUX4 switches.
SCIF1 can be enabled through a device tree overlay. To manage all switches
in a unified state and allow users to configure the output device tree, add
a file that contains all switch definitions and states.

Commit prepares the code to enable SCIF1 on the RZ/G3S overlay.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250120130936.1080069-3-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
This commit is contained in:
Claudiu Beznea 2025-01-20 15:09:34 +02:00 committed by Geert Uytterhoeven
parent 2f9f69188e
commit 02760e35b5
2 changed files with 33 additions and 19 deletions
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20
arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
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@ -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";

32
arch/arm64/boot/dts/renesas/rzg3s-smarc-switches.h Normal file
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@ -0,0 +1,32 @@
/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
/*
* 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_H__
#define __RZG3S_SMARC_SWITCHES_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
#endif /* __RZG3S_SMARC_SWITCHES_H__ */