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  3. [PATCH 00/13] arm64: dts: renesas: Add support for SCI/LEDs/I2C/MMC on RZ/{T2H,RZ/N2H} SoCs and boards
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[PATCH 11/13] arm64: dts: renesas: rzt2h/rzn2h: Enable eMMC

Prabhakar posted 13 patches 6 months ago
[PATCH 11/13] arm64: dts: renesas: rzt2h/rzn2h: Enable eMMC
Posted by Prabhakar 6 months ago 
From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.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@bp.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
Re: [PATCH 11/13] arm64: dts: renesas: rzt2h/rzn2h: Enable eMMC
Posted by Geert Uytterhoeven 5 months, 3 weeks ago 
Hi Prabhakar,

On Tue, 12 Aug 2025 at 22:03, Prabhakar <prabhakar.csengg@gmail.com> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.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@bp.renesas.com>

Thanks for your patch!

> --- 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
> + */

Both SD0 and eMMC also need DSW17[5] = OFF; DSW17[6] = ON.

> +#define SD0_EMMC       1
> +
>  #include "rzt2h-n2h-evk-common.dtsi"
>
>  /*

> --- a/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
> +++ b/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi

> @@ -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 {

No need for repeated sd0-emmc-prefixes in the subnodes.


> +                       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# */
> +               };
> +       };
>  };

The rest LGTM.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
Re: [PATCH 11/13] arm64: dts: renesas: rzt2h/rzn2h: Enable eMMC
Posted by Lad, Prabhakar 5 months, 3 weeks ago 
Hi Geert,

Thank you for the review.

On Mon, Aug 18, 2025 at 5:02 PM Geert Uytterhoeven <geert@linux-m68k.org> wrote:
>
> Hi Prabhakar,
>
> On Tue, 12 Aug 2025 at 22:03, Prabhakar <prabhakar.csengg@gmail.com> wrote:
> > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.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@bp.renesas.com>
>
> Thanks for your patch!
>
> > --- 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
> > + */
>
> Both SD0 and eMMC also need DSW17[5] = OFF; DSW17[6] = ON.
>
Agreed.

> > +#define SD0_EMMC       1
> > +
> >  #include "rzt2h-n2h-evk-common.dtsi"
> >
> >  /*
>
> > --- a/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
> > +++ b/arch/arm64/boot/dts/renesas/rzt2h-n2h-evk-common.dtsi
>
> > @@ -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 {
>
> No need for repeated sd0-emmc-prefixes in the subnodes.
>
>
Ok, I will get rid of them.

Cheers,
Prabhakar

> > +                       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# */
> > +               };
> > +       };
> >  };
>
> The rest LGTM.
>
> Gr{oetje,eeting}s,
>
>                         Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
>
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds

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