diff --git a/arch/arm/dts/hihope-common.dtsi b/arch/arm/dts/hihope-common.dtsi
new file mode 100644
index 0000000..b1eb6a0
--- /dev/null
+++ b/arch/arm/dts/hihope-common.dtsi
@@ -0,0 +1,377 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree Source for the HiHope RZ/G2H Rev.4.0 and
+ * HiHope RZ/G2[MN] Rev.[2.0/3.0/4.0] main board common parts
+ *
+ * Copyright (C) 2021 Renesas Electronics Corp.
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+
+/ {
+	aliases {
+		serial0 = &scif2;
+		serial1 = &hscif0;
+	};
+
+	chosen {
+		bootargs = "ignore_loglevel";
+		stdout-path = "serial0:115200n8";
+	};
+
+	hdmi0-out {
+		compatible = "hdmi-connector";
+		type = "a";
+
+		port {
+			hdmi0_con: endpoint {
+				remote-endpoint = <&rcar_dw_hdmi0_out>;
+			};
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led1 {
+			gpios = <&gpio6 12 GPIO_ACTIVE_HIGH>;
+		};
+
+		led2 {
+			gpios = <&gpio6 13 GPIO_ACTIVE_HIGH>;
+		};
+
+		led3 {
+			gpios = <&gpio0  0 GPIO_ACTIVE_HIGH>;
+		};
+
+		led4 {
+			gpios = <&gpio6 11 GPIO_ACTIVE_HIGH>;
+		};
+	};
+
+	reg_1p8v: regulator0 {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-1.8V";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	reg_3p3v: regulator1 {
+		compatible = "regulator-fixed";
+		regulator-name = "fixed-3.3V";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-boot-on;
+		regulator-always-on;
+	};
+
+	sound_card: sound {
+		compatible = "audio-graph-card";
+
+		label = "rcar-sound";
+
+		dais = <&rsnd_port>;
+	};
+
+	vbus0_usb2: regulator-vbus0-usb2 {
+		compatible = "regulator-fixed";
+
+		regulator-name = "USB20_VBUS0";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+
+		gpio = <&gpio6 16 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
+	vccq_sdhi0: regulator-vccq-sdhi0 {
+		compatible = "regulator-gpio";
+
+		regulator-name = "SDHI0 VccQ";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <3300000>;
+
+		gpios = <&gpio6 30 GPIO_ACTIVE_HIGH>;
+		gpios-states = <1>;
+		states = <3300000 1>, <1800000 0>;
+	};
+
+	x302_clk: x302-clock {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <33000000>;
+	};
+
+	x304_clk: x304-clock {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <25000000>;
+	};
+};
+
+&audio_clk_a {
+	clock-frequency = <22579200>;
+};
+
+&du {
+	status = "okay";
+};
+
+&ehci0 {
+	status = "okay";
+};
+
+&ehci1 {
+	status = "okay";
+};
+
+&extal_clk {
+	clock-frequency = <16666666>;
+};
+
+&extalr_clk {
+	clock-frequency = <32768>;
+};
+
+&gpio6 {
+	usb1-reset {
+		gpio-hog;
+		gpios = <10 GPIO_ACTIVE_LOW>;
+		output-low;
+		line-name = "usb1-reset";
+	};
+};
+
+&hdmi0 {
+	status = "okay";
+
+	ports {
+		port@1 {
+			reg = <1>;
+			rcar_dw_hdmi0_out: endpoint {
+				remote-endpoint = <&hdmi0_con>;
+			};
+		};
+		port@2 {
+			reg = <2>;
+			dw_hdmi0_snd_in: endpoint {
+				remote-endpoint = <&rsnd_endpoint>;
+			};
+		};
+	};
+};
+
+&hscif0 {
+	pinctrl-0 = <&hscif0_pins>;
+	pinctrl-names = "default";
+
+	uart-has-rtscts;
+	status = "okay";
+};
+
+&hsusb {
+	dr_mode = "otg";
+	status = "okay";
+};
+
+&i2c4 {
+	clock-frequency = <400000>;
+	status = "okay";
+
+	versaclock5: clock-generator@6a {
+		compatible = "idt,5p49v5923";
+		reg = <0x6a>;
+		#clock-cells = <1>;
+		clocks = <&x304_clk>;
+		clock-names = "xin";
+	};
+};
+
+&ohci0 {
+	status = "okay";
+};
+
+&ohci1 {
+	status = "okay";
+};
+
+&pcie_bus_clk {
+	clock-frequency = <100000000>;
+};
+
+&pfc {
+	pinctrl-0 = <&scif_clk_pins>;
+	pinctrl-names = "default";
+
+	hscif0_pins: hscif0 {
+		groups = "hscif0_data", "hscif0_ctrl";
+		function = "hscif0";
+	};
+
+	scif2_pins: scif2 {
+		groups = "scif2_data_a";
+		function = "scif2";
+	};
+
+	scif_clk_pins: scif_clk {
+		groups = "scif_clk_a";
+		function = "scif_clk";
+	};
+
+	sdhi0_pins: sd0 {
+		groups = "sdhi0_data4", "sdhi0_ctrl";
+		function = "sdhi0";
+		power-source = <3300>;
+	};
+
+	sdhi0_pins_uhs: sd0_uhs {
+		groups = "sdhi0_data4", "sdhi0_ctrl";
+		function = "sdhi0";
+		power-source = <1800>;
+	};
+
+	sdhi2_pins: sd2 {
+		groups = "sdhi2_data4", "sdhi2_ctrl";
+		function = "sdhi2";
+		power-source = <1800>;
+	};
+
+	sdhi3_pins: sd3 {
+		groups = "sdhi3_data8", "sdhi3_ctrl", "sdhi3_ds";
+		function = "sdhi3";
+		power-source = <1800>;
+	};
+
+	usb0_pins: usb0 {
+		groups = "usb0";
+		function = "usb0";
+	};
+
+	usb1_pins: usb1 {
+		mux {
+			groups = "usb1";
+			function = "usb1";
+		};
+
+		ovc {
+			pins = "GP_6_27";
+			bias-pull-up;
+		};
+	};
+
+	usb30_pins: usb30 {
+		groups = "usb30";
+		function = "usb30";
+	};
+};
+
+&rwdt {
+	timeout-sec = <60>;
+	status = "okay";
+};
+
+&scif2 {
+	pinctrl-0 = <&scif2_pins>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
+
+&scif_clk {
+	clock-frequency = <14745600>;
+};
+
+&sdhi0 {
+	pinctrl-0 = <&sdhi0_pins>;
+	pinctrl-1 = <&sdhi0_pins_uhs>;
+	pinctrl-names = "default", "state_uhs";
+
+	vmmc-supply = <&reg_3p3v>;
+	vqmmc-supply = <&vccq_sdhi0>;
+	cd-gpios = <&gpio3 12 GPIO_ACTIVE_LOW>;
+	bus-width = <4>;
+	sd-uhs-sdr50;
+	sd-uhs-sdr104;
+	status = "okay";
+};
+
+&sdhi2 {
+	status = "okay";
+	pinctrl-0 = <&sdhi2_pins>;
+	pinctrl-names = "default";
+
+	vmmc-supply = <&wlan_en_reg>;
+	bus-width = <4>;
+	non-removable;
+	cap-power-off-card;
+	keep-power-in-suspend;
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+	wlcore: wlcore@2 {
+		compatible = "ti,wl1837";
+		reg = <2>;
+		interrupt-parent = <&gpio2>;
+		interrupts = <5 IRQ_TYPE_LEVEL_HIGH>;
+	};
+};
+
+&sdhi3 {
+	pinctrl-0 = <&sdhi3_pins>;
+	pinctrl-1 = <&sdhi3_pins>;
+	pinctrl-names = "default", "state_uhs";
+
+	vmmc-supply = <&reg_3p3v>;
+	vqmmc-supply = <&reg_1p8v>;
+	bus-width = <8>;
+	mmc-hs200-1_8v;
+	non-removable;
+	fixed-emmc-driver-type = <1>;
+	status = "okay";
+};
+
+&usb_extal_clk {
+	clock-frequency = <50000000>;
+};
+
+&usb2_phy0 {
+	pinctrl-0 = <&usb0_pins>;
+	pinctrl-names = "default";
+
+	vbus-supply = <&vbus0_usb2>;
+	status = "okay";
+};
+
+&usb2_phy1 {
+	pinctrl-0 = <&usb1_pins>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
+
+&usb3_peri0 {
+	phys = <&usb3_phy0>;
+	phy-names = "usb";
+
+	companion = <&xhci0>;
+
+	status = "okay";
+};
+
+&usb3_phy0 {
+	status = "okay";
+};
+
+&usb3s0_clk {
+	clock-frequency = <100000000>;
+};
+
+&xhci0 {
+	pinctrl-0 = <&usb30_pins>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
diff --git a/arch/arm/dts/hihope-rev4.dtsi b/arch/arm/dts/hihope-rev4.dtsi
new file mode 100644
index 0000000..30e9299
--- /dev/null
+++ b/arch/arm/dts/hihope-rev4.dtsi
@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree Source for the HiHope RZ/G2H Rev.4.0 and
+ * HiHope RZ/G2[MN] Rev.3.0/4.0 main board common parts
+ *
+ * Copyright (C) 2021 Renesas Electronics Corp.
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+#include "hihope-common.dtsi"
+
+/ {
+	audio_clkout: audio-clkout {
+		/*
+		 * This is same as <&rcar_sound 0>
+		 * but needed to avoid cs2000/rcar_sound probe dead-lock
+		 */
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <12288000>;
+	};
+
+	wlan_en_reg: regulator-wlan_en {
+		compatible = "regulator-fixed";
+		regulator-name = "wlan-en-regulator";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		startup-delay-us = <70000>;
+
+		gpio = <&gpio4 6 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+	};
+
+	x1801_clk: x1801-clock {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <24576000>;
+	};
+};
+
+&hscif0 {
+	bluetooth {
+		compatible = "ti,wl1837-st";
+		enable-gpios = <&gpio3 13 GPIO_ACTIVE_HIGH>;
+	};
+};
+
+&i2c2 {
+	pinctrl-0 = <&i2c2_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	cs2000: clk_multiplier@4f {
+		#clock-cells = <0>;
+		compatible = "cirrus,cs2000-cp";
+		reg = <0x4f>;
+		clocks = <&audio_clkout>, <&x1801_clk>;
+		clock-names = "clk_in", "ref_clk";
+
+		assigned-clocks = <&cs2000>;
+		assigned-clock-rates = <24576000>; /* 1/1 divide */
+	};
+};
+
+&pfc {
+	i2c2_pins: i2c2 {
+		groups = "i2c2_a";
+		function = "i2c2";
+	};
+
+	sound_clk_pins: sound_clk {
+		groups = "audio_clk_a_a", "audio_clk_b_a", "audio_clkout_a";
+		function = "audio_clk";
+	};
+
+	sound_pins: sound {
+		groups = "ssi01239_ctrl", "ssi0_data", "ssi1_data_a";
+		function = "ssi";
+	};
+};
+
+&rcar_sound {
+	pinctrl-0 = <&sound_pins &sound_clk_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	/* Single DAI */
+	#sound-dai-cells = <0>;
+
+	/* audio_clkout0/1/2/3 */
+	#clock-cells = <1>;
+	clock-frequency = <12288000 11289600>;
+
+	/* update <audio_clk_b> to <cs2000> */
+	clocks = <&cpg CPG_MOD 1005>,
+		 <&cpg CPG_MOD 1006>, <&cpg CPG_MOD 1007>,
+		 <&cpg CPG_MOD 1008>, <&cpg CPG_MOD 1009>,
+		 <&cpg CPG_MOD 1010>, <&cpg CPG_MOD 1011>,
+		 <&cpg CPG_MOD 1012>, <&cpg CPG_MOD 1013>,
+		 <&cpg CPG_MOD 1014>, <&cpg CPG_MOD 1015>,
+		 <&cpg CPG_MOD 1022>, <&cpg CPG_MOD 1023>,
+		 <&cpg CPG_MOD 1024>, <&cpg CPG_MOD 1025>,
+		 <&cpg CPG_MOD 1026>, <&cpg CPG_MOD 1027>,
+		 <&cpg CPG_MOD 1028>, <&cpg CPG_MOD 1029>,
+		 <&cpg CPG_MOD 1030>, <&cpg CPG_MOD 1031>,
+		 <&cpg CPG_MOD 1020>, <&cpg CPG_MOD 1021>,
+		 <&cpg CPG_MOD 1020>, <&cpg CPG_MOD 1021>,
+		 <&cpg CPG_MOD 1019>, <&cpg CPG_MOD 1018>,
+		 <&audio_clk_a>, <&cs2000>,
+		 <&audio_clk_c>,
+		 <&cpg CPG_CORE CPG_AUDIO_CLK_I>;
+
+	rsnd_port: port {
+		rsnd_endpoint: endpoint {
+			remote-endpoint = <&dw_hdmi0_snd_in>;
+
+			dai-format = "i2s";
+			bitclock-master = <&rsnd_endpoint>;
+			frame-master = <&rsnd_endpoint>;
+
+			playback = <&ssi2>;
+		};
+	};
+};
diff --git a/arch/arm/dts/hihope-rzg2-ex.dtsi b/arch/arm/dts/hihope-rzg2-ex.dtsi
new file mode 100644
index 0000000..7745012
--- /dev/null
+++ b/arch/arm/dts/hihope-rzg2-ex.dtsi
@@ -0,0 +1,92 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree Source for the RZ/G2[HMN] HiHope sub board common parts
+ *
+ * Copyright (C) 2021 Renesas Electronics Corp.
+ */
+
+/ {
+	aliases {
+		ethernet0 = &avb;
+	};
+
+	chosen {
+		bootargs = "ignore_loglevel rw root=/dev/nfs ip=on";
+	};
+};
+
+&avb {
+	pinctrl-0 = <&avb_pins>;
+	pinctrl-names = "default";
+	phy-handle = <&phy0>;
+	phy-mode = "rgmii-txid";
+	status = "okay";
+
+	phy0: ethernet-phy@0 {
+		reg = <0>;
+		interrupt-parent = <&gpio2>;
+		interrupts = <11 IRQ_TYPE_LEVEL_LOW>;
+		reset-gpios = <&gpio2 10 GPIO_ACTIVE_LOW>;
+	};
+};
+
+&can0 {
+	pinctrl-0 = <&can0_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+&can1 {
+	pinctrl-0 = <&can1_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+&pciec0 {
+	status = "okay";
+};
+
+&pfc {
+	pinctrl-0 = <&scif_clk_pins>;
+	pinctrl-names = "default";
+
+	avb_pins: avb {
+		mux {
+			groups = "avb_link", "avb_mdio", "avb_mii";
+			function = "avb";
+		};
+
+		pins_mdio {
+			groups = "avb_mdio";
+			drive-strength = <24>;
+		};
+
+		pins_mii_tx {
+			pins = "PIN_AVB_TX_CTL", "PIN_AVB_TXC", "PIN_AVB_TD0",
+			       "PIN_AVB_TD1", "PIN_AVB_TD2", "PIN_AVB_TD3";
+			drive-strength = <12>;
+		};
+	};
+
+	can0_pins: can0 {
+		groups = "can0_data_a";
+		function = "can0";
+	};
+
+	can1_pins: can1 {
+		groups = "can1_data";
+		function = "can1";
+	};
+
+	pwm0_pins: pwm0 {
+		groups = "pwm0";
+		function = "pwm0";
+	};
+};
+
+&pwm0 {
+	pinctrl-0 = <&pwm0_pins>;
+	pinctrl-names = "default";
+
+	status = "okay";
+};
diff --git a/arch/arm/dts/r8a774a1-hihope-rzg2m-ex.dts b/arch/arm/dts/r8a774a1-hihope-rzg2m-ex.dts
new file mode 100644
index 0000000..f0e4a1f
--- /dev/null
+++ b/arch/arm/dts/r8a774a1-hihope-rzg2m-ex.dts
@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree Source for the HiHope RZ/G2M Rev.3.0/4.0 connected to
+ * sub board
+ *
+ * Copyright (C) 2021 Renesas Electronics Corp.
+ */
+
+#include "r8a774a1-hihope-rzg2m.dts"
+#include "hihope-rzg2-ex.dtsi"
+
+/ {
+	model = "HopeRun HiHope RZ/G2M with sub board";
+	compatible = "hoperun,hihope-rzg2-ex", "hoperun,hihope-rzg2m",
+		     "renesas,r8a774a1";
+};
+
+/* SW43 should be OFF, if in ON state SATA port will be activated */
+&pciec1 {
+	status = "okay";
+};
diff --git a/arch/arm/dts/r8a774a1-hihope-rzg2m-u-boot.dts b/arch/arm/dts/r8a774a1-hihope-rzg2m-u-boot.dts
new file mode 100644
index 0000000..b735e97
--- /dev/null
+++ b/arch/arm/dts/r8a774a1-hihope-rzg2m-u-boot.dts
@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree Source extras for U-Boot for the Hihope RZ/G2M board
+ *
+ * Copyright (C) 2021 Renesas Electronics Corporation
+ */
+
+#include "r8a774a1-hihope-rzg2m-ex.dts"
+#include "r8a774a1-u-boot.dtsi"
+
+&gpio3 {
+	bt_reg_on{
+		gpio-hog;
+		gpios = <13 GPIO_ACTIVE_HIGH>;
+		output-low;
+		line-name = "bt-reg-on";
+	};
+};
+
+&gpio4 {
+	wlan_reg_on{
+		gpio-hog;
+		gpios = <6 GPIO_ACTIVE_HIGH>;
+		output-low;
+		line-name = "wlan-reg-on";
+	};
+};
diff --git a/arch/arm/dts/r8a774a1-hihope-rzg2m.dts b/arch/arm/dts/r8a774a1-hihope-rzg2m.dts
new file mode 100644
index 0000000..a574c85
--- /dev/null
+++ b/arch/arm/dts/r8a774a1-hihope-rzg2m.dts
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree Source for the HiHope RZ/G2M Rev.3.0/4.0 main board
+ *
+ * Copyright (C) 2021 Renesas Electronics Corp.
+ */
+
+/dts-v1/;
+#include "r8a774a1.dtsi"
+#include "hihope-rev4.dtsi"
+
+/ {
+	model = "HopeRun HiHope RZ/G2M main board based on r8a774a1";
+	compatible = "hoperun,hihope-rzg2m", "renesas,r8a774a1";
+
+	memory@48000000 {
+		device_type = "memory";
+		/* first 128MB is reserved for secure area. */
+		reg = <0x0 0x48000000 0x0 0x78000000>;
+	};
+
+	memory@600000000 {
+		device_type = "memory";
+		reg = <0x6 0x00000000 0x0 0x80000000>;
+	};
+};
+
+&du {
+	clocks = <&cpg CPG_MOD 724>,
+		 <&cpg CPG_MOD 723>,
+		 <&cpg CPG_MOD 722>,
+		 <&versaclock5 1>,
+		 <&x302_clk>,
+		 <&versaclock5 2>;
+	clock-names = "du.0", "du.1", "du.2",
+		      "dclkin.0", "dclkin.1", "dclkin.2";
+};
diff --git a/arch/arm/dts/r8a774a1-u-boot.dtsi b/arch/arm/dts/r8a774a1-u-boot.dtsi
new file mode 100644
index 0000000..f826c41
--- /dev/null
+++ b/arch/arm/dts/r8a774a1-u-boot.dtsi
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree Source extras for U-Boot on RZ/G2 R8A774A1 SoC
+ *
+ * Copyright (C) 2021 Renesas Electronics Corporation
+ */
+
+#include "r8a779x-u-boot.dtsi"
+
+&extalr_clk {
+	u-boot,dm-pre-reloc;
+};
+
+/delete-node/ &audma0;
+/delete-node/ &audma1;
+/delete-node/ &can0;
+/delete-node/ &can1;
+/delete-node/ &canfd;
+/delete-node/ &csi20;
+/delete-node/ &csi40;
+/delete-node/ &du;
+/delete-node/ &fcpf0;
+/delete-node/ &fcpvb0;
+/delete-node/ &fcpvd0;
+/delete-node/ &fcpvd1;
+/delete-node/ &fcpvd2;
+/delete-node/ &fcpvi0;
+/delete-node/ &hdmi0;
+/delete-node/ &lvds0;
+/delete-node/ &rcar_sound;
+/delete-node/ &sdhi2;
+/delete-node/ &sound_card;
+/delete-node/ &vin0;
+/delete-node/ &vin1;
+/delete-node/ &vin2;
+/delete-node/ &vin3;
+/delete-node/ &vin4;
+/delete-node/ &vin5;
+/delete-node/ &vin6;
+/delete-node/ &vin7;
+/delete-node/ &vspb;
+/delete-node/ &vspd0;
+/delete-node/ &vspd1;
+/delete-node/ &vspd2;
+/delete-node/ &vspi0;
+
+/ {
+	/delete-node/ hdmi0-out;
+};
+
+/ {
+	soc {
+		/delete-node/ fdp1@fe940000;
+	};
+};
diff --git a/drivers/mmc/renesas-sdhi.c b/drivers/mmc/renesas-sdhi.c
index 24130e6..2acb8c6 100644
--- a/drivers/mmc/renesas-sdhi.c
+++ b/drivers/mmc/renesas-sdhi.c
@@ -862,6 +862,9 @@
 	if (!(priv->caps & TMIO_SD_CAP_RCAR_GEN3))
 		return;
 
+	if (priv->caps & TMIO_SD_CAP_DMA_INTERNAL)
+		priv->idma_bus_width = TMIO_SD_DMA_MODE_BUS_WIDTH;
+
 #if CONFIG_IS_ENABLED(MMC_UHS_SUPPORT) || \
     CONFIG_IS_ENABLED(MMC_HS200_SUPPORT) || \
     CONFIG_IS_ENABLED(MMC_HS400_SUPPORT)
diff --git a/drivers/mmc/tmio-common.c b/drivers/mmc/tmio-common.c
index 2c52868..6c0c840 100644
--- a/drivers/mmc/tmio-common.c
+++ b/drivers/mmc/tmio-common.c
@@ -324,6 +324,8 @@
 
 	tmp = tmio_sd_readl(priv, TMIO_SD_DMA_MODE);
 
+	tmp |= priv->idma_bus_width;
+
 	if (data->flags & MMC_DATA_READ) {
 		buf = data->dest;
 		dir = DMA_FROM_DEVICE;
@@ -702,6 +704,7 @@
 	if (priv->caps & TMIO_SD_CAP_DMA_INTERNAL) {
 		tmp = tmio_sd_readl(priv, TMIO_SD_DMA_MODE);
 		tmp |= TMIO_SD_DMA_MODE_ADDR_INC;
+		tmp |= priv->idma_bus_width;
 		tmio_sd_writel(priv, tmp, TMIO_SD_DMA_MODE);
 	}
 }
diff --git a/drivers/mmc/tmio-common.h b/drivers/mmc/tmio-common.h
index 9062300..59d5a0e 100644
--- a/drivers/mmc/tmio-common.h
+++ b/drivers/mmc/tmio-common.h
@@ -90,6 +90,7 @@
 #define   TMIO_SD_VOLT_180		(2 << 0)/* 1.8V signal */
 #define TMIO_SD_DMA_MODE		0x410
 #define   TMIO_SD_DMA_MODE_DIR_RD	BIT(16)	/* 1: from device, 0: to dev */
+#define   TMIO_SD_DMA_MODE_BUS_WIDTH	(BIT(5) | BIT(4)) /* RCar, 64bit */
 #define   TMIO_SD_DMA_MODE_ADDR_INC	BIT(0)	/* 1: address inc, 0: fixed */
 #define TMIO_SD_DMA_CTL		0x414
 #define   TMIO_SD_DMA_CTL_START	BIT(0)	/* start DMA (auto cleared) */
@@ -121,6 +122,7 @@
 	unsigned int			version;
 	u32				caps;
 	u32				read_poll_flag;
+	u32				idma_bus_width;
 #define TMIO_SD_CAP_NONREMOVABLE	BIT(0)	/* Nonremovable e.g. eMMC */
 #define TMIO_SD_CAP_DMA_INTERNAL	BIT(1)	/* have internal DMA engine */
 #define TMIO_SD_CAP_DIV1024		BIT(2)	/* divisor 1024 is available */