linux-kernel - [PATCH 11/13] arm64: dts: renesas: rzt2h/rzn2h: Enable eMMC

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Message-ID: <20250812200344.3253781-12-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Tue, 12 Aug 2025 21:03:42 +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>,
	Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH 11/13] arm64: dts: renesas: rzt2h/rzn2h: Enable eMMC

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

Enable eMMC on RZ/T2H and RZ/N2H EVKs. As SDHI0 can be connected to
either eMMC0/SD0 `SD0_EMMC` macro is added.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
---
 .../dts/renesas/r9a09g077m44-rzt2h-evk.dts    |  9 +++
 .../dts/renesas/r9a09g087m44-rzn2h-evk.dts    |  9 +++
 .../dts/renesas/rzt2h-n2h-evk-common.dtsi     | 62 +++++++++++++++++++
 3 files changed, 80 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts b/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
index 36e3b630727a..05945a8a3228 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
+++ b/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
@@ -11,6 +11,15 @@
 #include <dt-bindings/pinctrl/renesas,r9a09g077-pinctrl.h>
 
 #include "r9a09g077m44.dtsi"
+
+/*
+ * SD0 can be connected to either eMMC (IC49) or SD card slot CN31
+ * Lets by default enable the eMMC, note we need the below SW settings
+ * for eMMC.
+ * SW2[1] = ON; SW2[2] = ON
+ */
+#define SD0_EMMC	1
+
 #include "rzt2h-n2h-evk-common.dtsi"
 
 / {
diff --git a/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts b/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
index e41b687e5497..89baa601a179 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
+++ b/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
@@ -10,6 +10,15 @@
 #include <dt-bindings/gpio/gpio.h>
 
 #include "r9a09g087m44.dtsi"
+
+/*
+ * SD0 can be connected to either eMMC (U33) or SD card slot CN21
+ * Lets by default enable the eMMC, note we need the below SW settings
+ * for eMMC.
+ * DSW5[1] = ON; DSW5[2] = ON
+ */
+#define SD0_EMMC       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 1a3d28054bf7..7fa49de2a243 100644
--- a/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
@@ -11,12 +11,31 @@ / {
 	aliases {
 		i2c0 = &i2c0;
 		i2c1 = &i2c1;
+		mmc0 = &sdhi0;
 		serial0 = &sci0;
 	};
 
 	chosen {
 		stdout-path = "serial0:115200n8";
 	};
+
+	reg_1p8v: regulator-1p8v {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-1.8V";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	reg_3p3v: regulator-3p3v {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-3.3V";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
 };
 
 &extal_clk {
@@ -44,6 +63,34 @@ sci0_pins: sci0-pins {
 		pinmux = <RZT2H_PORT_PINMUX(27, 4, 0x14)>,
 			 <RZT2H_PORT_PINMUX(27, 5, 0x14)>;
 	};
+
+#if SD0_EMMC
+	sdhi0-emmc-iovs-hog {
+		gpio-hog;
+		gpios = <RZT2H_GPIO(2, 6) GPIO_ACTIVE_HIGH>;
+		output-high;
+		line-name = "SD0_IOVS";
+	};
+#endif
+
+	sdhi0_emmc_pins: sd0-emmc-group {
+		sd0-emmc-data-pins {
+			pinmux = <RZT2H_PORT_PINMUX(12, 2, 0x29)>, /* SD0_DATA0 */
+				 <RZT2H_PORT_PINMUX(12, 3, 0x29)>, /* SD0_DATA1 */
+				 <RZT2H_PORT_PINMUX(12, 4, 0x29)>, /* SD0_DATA2 */
+				 <RZT2H_PORT_PINMUX(12, 5, 0x29)>, /* SD0_DATA3 */
+				 <RZT2H_PORT_PINMUX(12, 6, 0x29)>, /* SD0_DATA4 */
+				 <RZT2H_PORT_PINMUX(12, 7, 0x29)>, /* SD0_DATA5 */
+				 <RZT2H_PORT_PINMUX(13, 0, 0x29)>, /* SD0_DATA6 */
+				 <RZT2H_PORT_PINMUX(13, 1, 0x29)>; /* SD0_DATA7 */
+		};
+
+		sd0-emmc-ctrl-pins {
+			pinmux = <RZT2H_PORT_PINMUX(12, 0, 0x29)>, /* SD0_CLK */
+				 <RZT2H_PORT_PINMUX(12, 1, 0x29)>, /* SD0_CMD */
+				 <RZT2H_PORT_PINMUX(13, 2, 0x29)>; /* SD0_RST# */
+		};
+	};
 };
 
 &sci0 {
@@ -51,3 +98,18 @@ &sci0 {
 	pinctrl-names = "default";
 	status = "okay";
 };
+
+#if SD0_EMMC
+&sdhi0 {
+	pinctrl-0 = <&sdhi0_emmc_pins>;
+	pinctrl-1 = <&sdhi0_emmc_pins>;
+	pinctrl-names = "default", "state_uhs";
+	vmmc-supply = <&reg_3p3v>;
+	vqmmc-supply = <&reg_1p8v>;
+	bus-width = <8>;
+	non-removable;
+	mmc-hs200-1_8v;
+	fixed-emmc-driver-type = <1>;
+	status = "okay";
+};
+#endif
-- 
2.50.1