linux-kernel - [PATCH v2 10/11] arm64: renesas: rzg3s-smarc-som: Use switches' names to select on-board functionalities

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Message-Id: <20231207070700.4156557-11-claudiu.beznea.uj@bp.renesas.com>
Date:   Thu,  7 Dec 2023 09:06:59 +0200
From:   Claudiu <claudiu.beznea@...on.dev>
To:     s.shtylyov@....ru, davem@...emloft.net, edumazet@...gle.com,
        kuba@...nel.org, pabeni@...hat.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        geert+renesas@...der.be, magnus.damm@...il.com,
        mturquette@...libre.com, sboyd@...nel.org,
        linus.walleij@...aro.org, prabhakar.mahadev-lad.rj@...renesas.com,
        biju.das.jz@...renesas.com
Cc:     linux-renesas-soc@...r.kernel.org, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-gpio@...r.kernel.org,
        Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: [PATCH v2 10/11] arm64: renesas: rzg3s-smarc-som: Use switches' names to select on-board functionalities

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

The intention of the SW_SD0_DEV_SEL and SW_SD2_EN macros was to reflect the
state of SW_CONFIG individual switches available on the RZ/G3S Smarc Module
and at the same time to have a descriptive name for the switch itself.
Each individual switch is associated with a signal name, which might be
active-low or not on the board. Using signal names instead of SW_CONFIG
switch names may be confusing for a user who just playes with switches to
select individual functionalities, but also for the advanced user that
looks over schematics. To avoid even further confusions, use the switches'
names here and instantitate them with an ON/OFF state. This should be
simpler, even though the name of the switch is not that intuitive. The
switch names documentation reflects the switch's purpose.

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

Changes in v2:
- this patch is new and aims to replace patch "arm64: renesas: rzg3s-smarc-som:
  Invert the logic of the SW_SD2_EN macro" from v1


 .../boot/dts/renesas/rzg3s-smarc-som.dtsi     | 34 ++++++++++++-------
 1 file changed, 21 insertions(+), 13 deletions(-)

diff --git a/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi b/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
index 01a4a9da7afc..f59094701a4a 100644
--- a/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzg3s-smarc-som.dtsi
@@ -9,23 +9,31 @@
 #include <dt-bindings/pinctrl/rzg2l-pinctrl.h>
 
 /*
- * Signals of SW_CONFIG switches:
- * @SW_SD0_DEV_SEL:
- *	0 - SD0 is connected to eMMC
- *	1 - SD0 is connected to uSD0 card
- * @SW_SD2_EN:
- *	0 - SCIF1, SSI0, IRQ0, IRQ1 connected to SoC
- *	1 - SD2 is connected to SoC
+ * On-board switches' states:
+ * @SW_OFF: switch's state is OFF
+ * @SW_ON:  switch's state is ON
  */
-#define SW_SD0_DEV_SEL	1
-#define SW_SD2_EN	1
+#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_ON
+#define SW_CONFIG3	SW_OFF
 
 / {
 	compatible = "renesas,rzg3s-smarcm", "renesas,r9a08g045s33", "renesas,r9a08g045";
 
 	aliases {
 		mmc0 = &sdhi0;
-#if SW_SD2_EN
+#if SW_CONFIG3 == SW_OFF
 		mmc2 = &sdhi2;
 #endif
 	};
@@ -50,7 +58,7 @@ vcc_sdhi0: regulator0 {
 		enable-active-high;
 	};
 
-#if SW_SD0_DEV_SEL
+#if SW_CONFIG2 == SW_ON
 	vccq_sdhi0: regulator1 {
 		compatible = "regulator-gpio";
 		regulator-name = "SDHI0 VccQ";
@@ -85,7 +93,7 @@ &extal_clk {
 	clock-frequency = <24000000>;
 };
 
-#if SW_SD0_DEV_SEL
+#if SW_CONFIG2 == SW_ON
 /* SD0 slot */
 &sdhi0 {
 	pinctrl-0 = <&sdhi0_pins>;
@@ -116,7 +124,7 @@ &sdhi0 {
 };
 #endif
 
-#if SW_SD2_EN
+#if SW_CONFIG3 == SW_OFF
 &sdhi2 {
 	pinctrl-0 = <&sdhi2_pins>;
 	pinctrl-names = "default";
-- 
2.39.2