linux-kernel - [PATCH v2 8/9] arm64: dts: renesas: rzt2h/rzn2h: Enable MicroSD card slot

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Message-ID: <20250820200659.2048755-9-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Wed, 20 Aug 2025 21:06:58 +0100
From: Prabhakar <prabhakar.csengg@...il.com>
To: Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>
Cc: linux-renesas-soc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Prabhakar <prabhakar.csengg@...il.com>,
	Biju Das <biju.das.jz@...renesas.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH v2 8/9] arm64: dts: renesas: rzt2h/rzn2h: Enable MicroSD card slot

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Enable MicroSD card slot which is connected to SDHI1 on the RZ/T2H and
RZ/N2H EVKs.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
---
v1->v2:
- Added alias for mmc1
- Dropped sd1-prefixes
---
 .../dts/renesas/r9a09g077m44-rzt2h-evk.dts    |  9 ++++
 .../dts/renesas/r9a09g087m44-rzn2h-evk.dts    |  6 +++
 .../dts/renesas/rzt2h-n2h-evk-common.dtsi     | 51 +++++++++++++++++++
 3 files changed, 66 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts b/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
index cb659b2a4337..37330c837f64 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
+++ b/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
@@ -17,6 +17,13 @@
  */
 #define SD0_EMMC	1
 
+/*
+ * P17_4 = SD1_CD; SW2[3] = ON
+ * P08_5 = SD1_PWEN; SW2[3] = ON
+ * P08_6 = SD1_IOVS; SW2[3] = ON; SW5[3] = OFF; SW5[4] = ON
+ */
+#define SD1_MICRO_SD	1
+
 #include "rzt2h-n2h-evk-common.dtsi"
 
 / {
@@ -49,6 +56,7 @@ led-2 {
 			function-enumerator = <2>;
 		};
 
+#if (!SD1_MICRO_SD)
 		led-3 {
 			/* SW2-3: OFF */
 			gpios = <&pinctrl RZT2H_GPIO(8, 5) GPIO_ACTIVE_HIGH>;
@@ -56,6 +64,7 @@ led-3 {
 			function = LED_FUNCTION_DEBUG;
 			function-enumerator = <3>;
 		};
+#endif
 
 		led-4 {
 			/* SW8-3: ON, SW8-4: OFF */
diff --git a/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts b/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
index 87e362f6f09f..87178933bee8 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
+++ b/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
@@ -18,6 +18,12 @@
  */
 #define SD0_EMMC       1
 
+/*
+ * P17_4 = SD1_CD; DSW5[3] = ON; DSW19[1] = OFF; DSW19[2] = ON
+ * P08_6 = SD1_IOVS; DSW5[3] = ON
+ */
+#define SD1_MICRO_SD	1
+
 #include "rzt2h-n2h-evk-common.dtsi"
 
 /*
diff --git a/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi b/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
index 68d493bf5e8c..34572630ecbe 100644
--- a/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
@@ -14,6 +14,7 @@ aliases {
 		i2c0 = &i2c0;
 		i2c1 = &i2c1;
 		mmc0 = &sdhi0;
+		mmc1 = &sdhi1;
 		serial0 = &sci0;
 	};
 
@@ -38,6 +39,18 @@ reg_3p3v: regulator-3p3v {
 		regulator-boot-on;
 		regulator-always-on;
 	};
+
+#if SD1_MICRO_SD
+	vccq_sdhi1: regulator-vccq-sdhi1 {
+		compatible = "regulator-gpio";
+		regulator-name = "SDHI1 VccQ";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <3300000>;
+		gpios = <&pinctrl RZT2H_GPIO(8, 6) GPIO_ACTIVE_HIGH>;
+		gpios-states = <0>;
+		states = <3300000 0>, <1800000 1>;
+	};
+#endif
 };
 
 &extal_clk {
@@ -93,6 +106,30 @@ ctrl-pins {
 				 <RZT2H_PORT_PINMUX(13, 2, 0x29)>; /* SD0_RST# */
 		};
 	};
+
+#if SD1_MICRO_SD
+	sdhi1-pwen-hog {
+		gpio-hog;
+		gpios = <RZT2H_GPIO(8, 5) GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "SD1_PWEN";
+	};
+#endif
+
+	sdhi1_pins: sd1-group {
+		data-pins {
+			pinmux = <RZT2H_PORT_PINMUX(16, 7, 0x29)>, /* SD1_DATA0 */
+				 <RZT2H_PORT_PINMUX(17, 0, 0x29)>, /* SD1_DATA1 */
+				 <RZT2H_PORT_PINMUX(17, 1, 0x29)>, /* SD1_DATA2 */
+				 <RZT2H_PORT_PINMUX(17, 2, 0x29)>; /* SD1_DATA3 */
+		};
+
+		ctrl-pins {
+			pinmux = <RZT2H_PORT_PINMUX(16, 5, 0x29)>, /* SD1_CLK */
+				 <RZT2H_PORT_PINMUX(16, 6, 0x29)>, /* SD1_CMD */
+				 <RZT2H_PORT_PINMUX(17, 4, 0x29)>; /* SD1_CD */
+		};
+	};
 };
 
 &sci0 {
@@ -115,3 +152,17 @@ &sdhi0 {
 	status = "okay";
 };
 #endif
+
+#if SD1_MICRO_SD
+&sdhi1 {
+	pinctrl-0 = <&sdhi1_pins>;
+	pinctrl-1 = <&sdhi1_pins>;
+	pinctrl-names = "default", "state_uhs";
+	vmmc-supply = <&reg_3p3v>;
+	vqmmc-supply = <&vccq_sdhi1>;
+	bus-width = <4>;
+	sd-uhs-sdr50;
+	sd-uhs-sdr104;
+	status = "okay";
+};
+#endif
-- 
2.51.0