[PATCH 0/6] Add MMC support for Mobileye EyeQ5 and EyeQ6 SoCs

[PATCH 0/6] Add MMC support for Mobileye EyeQ5 and EyeQ6 SoCs

[Benoît Monin]

The MMC/SDHCI controller found in Mobileye EyeQ5 and EyeQ6 SoCs is 
based on Cadence cdns sd4hc IP. It supports up to HS400HS mode. The 
only peculiarity of the hardware is that it needs the preset value
quirk to configure the clock properly at speed slower than HS200.

This patchset adds a compatible device tree binding to cdns sdhci for 
mobileye then uses it in the sdhci-cadence driver.

It also adds an emmc entry in the dtsi of each SoC and the config 
options in each defconfig to allow using an eMMC for the rootfs.

Benoît Monin (6):
  dt-bindings: mmc: cdns: add Mobileye EyeQ MMC/SDHCI controller
  mmc: sdhci-cadence: add Mobileye eyeQ support
  MIPS: mobileye: dts: eyeq6h: add the emmc controller
  MIPS: eyeq6_defconfig: add cadence MMC/SDHCI driver
  MIPS: mobileye: dts: eyeq5: add the emmc controller
  MIPS: eyeq5_defconfig: add cadence MMC/SDHCI driver

 .../devicetree/bindings/mmc/cdns,sdhci.yaml   |  1 +
 arch/mips/boot/dts/mobileye/eyeq5.dtsi        | 22 +++++++++++++++++++
 arch/mips/boot/dts/mobileye/eyeq6h.dtsi       | 22 +++++++++++++++++++
 arch/mips/configs/eyeq5_defconfig             |  2 ++
 arch/mips/configs/eyeq6_defconfig             |  2 ++
 drivers/mmc/host/sdhci-cadence.c              | 11 ++++++++++
 6 files changed, 60 insertions(+)

[PATCH 1/6] dt-bindings: mmc: cdns: add Mobileye EyeQ MMC/SDHCI controller

[Benoît Monin]

The MMC/SD controller from Mobileye is compatible with cdns,sd4hc, but
will need the preset broken value quirk for speed slower than HS200.

Signed-off-by: Benoît Monin <benoit.monin@bootlin.com>
---
 Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml b/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml
index 0432cc96f7ca..ac75d694611a 100644
--- a/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml
+++ b/Documentation/devicetree/bindings/mmc/cdns,sdhci.yaml
@@ -16,6 +16,7 @@ properties:
           - amd,pensando-elba-sd4hc
           - microchip,mpfs-sd4hc
           - microchip,pic64gx-sd4hc
+          - mobileye,eyeq-sd4hc
           - socionext,uniphier-sd4hc
       - const: cdns,sd4hc
 

[PATCH 2/6] mmc: sdhci-cadence: add Mobileye eyeQ support

[Benoît Monin]

The MMC/SDHCI controller implemented by Mobileye needs the preset value
quirks to configure the clock properly at speed slower than HS200.
It otherwise works as a standard sd4hc controller.

Signed-off-by: Benoît Monin <benoit.monin@bootlin.com>
---
 drivers/mmc/host/sdhci-cadence.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/mmc/host/sdhci-cadence.c b/drivers/mmc/host/sdhci-cadence.c
index a94b297fcf2a..60ca09780da3 100644
--- a/drivers/mmc/host/sdhci-cadence.c
+++ b/drivers/mmc/host/sdhci-cadence.c
@@ -433,6 +433,13 @@ static const struct sdhci_cdns_drv_data sdhci_elba_drv_data = {
 	},
 };
 
+static const struct sdhci_cdns_drv_data sdhci_eyeq_drv_data = {
+	.pltfm_data = {
+		.ops = &sdhci_cdns_ops,
+		.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
+	},
+};
+
 static const struct sdhci_cdns_drv_data sdhci_cdns_drv_data = {
 	.pltfm_data = {
 		.ops = &sdhci_cdns_ops,
@@ -595,6 +602,10 @@ static const struct of_device_id sdhci_cdns_match[] = {
 		.compatible = "amd,pensando-elba-sd4hc",
 		.data = &sdhci_elba_drv_data,
 	},
+	{
+		.compatible = "mobileye,eyeq-sd4hc",
+		.data = &sdhci_eyeq_drv_data,
+	},
 	{ .compatible = "cdns,sd4hc" },
 	{ /* sentinel */ }
 };

[PATCH 3/6] MIPS: mobileye: dts: eyeq6h: add the emmc controller

[Benoît Monin]

Add the MMC/SDHCI controller found in the eyeQ6 SoC. It is based on the
cadence sd4hc controller and support modes up to HS400 enhanced strobe.

Signed-off-by: Benoît Monin <benoit.monin@bootlin.com>
---
 arch/mips/boot/dts/mobileye/eyeq6h.dtsi | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/mips/boot/dts/mobileye/eyeq6h.dtsi b/arch/mips/boot/dts/mobileye/eyeq6h.dtsi
index dabd5ed778b7..bbd463435ad6 100644
--- a/arch/mips/boot/dts/mobileye/eyeq6h.dtsi
+++ b/arch/mips/boot/dts/mobileye/eyeq6h.dtsi
@@ -109,6 +109,28 @@ olb_east: system-controller@d3358000 {
 			clock-names = "ref";
 		};
 
+		emmc: sdhci@d8010000 {
+			compatible = "mobileye,eyeq-sd4hc", "cdns,sd4hc";
+			reg = <0 0xd8010000 0x0 0x1000>;
+			interrupt-parent = <&gic>;
+			interrupts = <GIC_SHARED 91 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&olb_south EQ6HC_SOUTH_DIV_EMMC>;
+			bus-width = <8>;
+			max-frequency = <200000000>;
+			mmc-ddr-1_8v;
+			sd-uhs-ddr50;
+			mmc-hs200-1_8v;
+			mmc-hs400-1_8v;
+			mmc-hs400-enhanced-strobe;
+
+			cdns,phy-input-delay-legacy = <4>;
+			cdns,phy-input-delay-mmc-highspeed = <2>;
+			cdns,phy-input-delay-mmc-ddr = <3>;
+			cdns,phy-dll-delay-sdclk = <32>;
+			cdns,phy-dll-delay-sdclk-hsmmc = <32>;
+			cdns,phy-dll-delay-strobe = <32>;
+		};
+
 		olb_south: system-controller@d8013000 {
 			compatible = "mobileye,eyeq6h-south-olb", "syscon";
 			reg = <0x0 0xd8013000 0x0 0x1000>;

[PATCH 4/6] MIPS: eyeq6_defconfig: add cadence MMC/SDHCI driver

[Benoît Monin]

Enable MMC support on eyeQ6 platform so it can be used as the root
partition.

Signed-off-by: Benoît Monin <benoit.monin@bootlin.com>
---
 arch/mips/configs/eyeq6_defconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/mips/configs/eyeq6_defconfig b/arch/mips/configs/eyeq6_defconfig
index 0afbb45a78e8..0a00a201937b 100644
--- a/arch/mips/configs/eyeq6_defconfig
+++ b/arch/mips/configs/eyeq6_defconfig
@@ -82,6 +82,8 @@ CONFIG_HID_MICROSOFT=y
 CONFIG_HID_MONTEREY=y
 CONFIG_MMC=y
 CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_PLTFM=y
+CONFIG_MMC_SDHCI_CADENCE=y
 # CONFIG_IOMMU_SUPPORT is not set
 CONFIG_RESET_CONTROLLER=y
 # CONFIG_NVMEM is not set

[PATCH 5/6] MIPS: mobileye: dts: eyeq5: add the emmc controller

[Benoît Monin]

Add the MMC/SDHCI controller found in the eyeQ5 SoC. It is based on the
cadence sd4hc controller and support modes up to HS400 enhanced strobe.

Signed-off-by: Benoît Monin <benoit.monin@bootlin.com>
---
 arch/mips/boot/dts/mobileye/eyeq5.dtsi | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/mips/boot/dts/mobileye/eyeq5.dtsi b/arch/mips/boot/dts/mobileye/eyeq5.dtsi
index a84e6e720619..e15d9ce0bdf4 100644
--- a/arch/mips/boot/dts/mobileye/eyeq5.dtsi
+++ b/arch/mips/boot/dts/mobileye/eyeq5.dtsi
@@ -178,6 +178,28 @@ timer {
 				clocks = <&olb EQ5C_CPU_CORE0>;
 			};
 		};
+
+		emmc: sdhci@2200000 {
+			compatible = "mobileye,eyeq-sd4hc", "cdns,sd4hc";
+			reg = <0 0x2200000 0x0 0x1000>;
+			interrupt-parent = <&gic>;
+			interrupts = <GIC_SHARED 10 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&olb EQ5C_PER_EMMC>;
+			bus-width = <8>;
+			max-frequency = <200000000>;
+			mmc-ddr-1_8v;
+			sd-uhs-ddr50;
+			mmc-hs200-1_8v;
+			mmc-hs400-1_8v;
+			mmc-hs400-enhanced-strobe;
+
+			cdns,phy-input-delay-legacy = <4>;
+			cdns,phy-input-delay-mmc-highspeed = <2>;
+			cdns,phy-input-delay-mmc-ddr = <3>;
+			cdns,phy-dll-delay-sdclk = <32>;
+			cdns,phy-dll-delay-sdclk-hsmmc = <32>;
+			cdns,phy-dll-delay-strobe = <32>;
+		};
 	};
 };
 

[PATCH 6/6] MIPS: eyeq5_defconfig: add cadence MMC/SDHCI driver

[Benoît Monin]

Enable MMC support on eyeQ5 platform so it can be used as the root
partition.

Signed-off-by: Benoît Monin <benoit.monin@bootlin.com>
---
 arch/mips/configs/eyeq5_defconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/mips/configs/eyeq5_defconfig b/arch/mips/configs/eyeq5_defconfig
index ff7af5dc6d9d..328016c1c6f4 100644
--- a/arch/mips/configs/eyeq5_defconfig
+++ b/arch/mips/configs/eyeq5_defconfig
@@ -79,6 +79,8 @@ CONFIG_HID_MICROSOFT=y
 CONFIG_HID_MONTEREY=y
 CONFIG_MMC=y
 CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_PLTFM=y
+CONFIG_MMC_SDHCI_CADENCE=y
 # CONFIG_IOMMU_SUPPORT is not set
 CONFIG_RESET_CONTROLLER=y
 # CONFIG_NVMEM is not set

Re: [PATCH 0/6] Add MMC support for Mobileye EyeQ5 and EyeQ6 SoCs

[Ulf Hansson]

On Tue, 17 Jun 2025 at 15:26, Benoît Monin <benoit.monin@bootlin.com> wrote:
>
> The MMC/SDHCI controller found in Mobileye EyeQ5 and EyeQ6 SoCs is
> based on Cadence cdns sd4hc IP. It supports up to HS400HS mode. The
> only peculiarity of the hardware is that it needs the preset value
> quirk to configure the clock properly at speed slower than HS200.
>
> This patchset adds a compatible device tree binding to cdns sdhci for
> mobileye then uses it in the sdhci-cadence driver.
>
> It also adds an emmc entry in the dtsi of each SoC and the config
> options in each defconfig to allow using an eMMC for the rootfs.
>
> Benoît Monin (6):
>   dt-bindings: mmc: cdns: add Mobileye EyeQ MMC/SDHCI controller
>   mmc: sdhci-cadence: add Mobileye eyeQ support
>   MIPS: mobileye: dts: eyeq6h: add the emmc controller
>   MIPS: eyeq6_defconfig: add cadence MMC/SDHCI driver
>   MIPS: mobileye: dts: eyeq5: add the emmc controller
>   MIPS: eyeq5_defconfig: add cadence MMC/SDHCI driver
>
>  .../devicetree/bindings/mmc/cdns,sdhci.yaml   |  1 +
>  arch/mips/boot/dts/mobileye/eyeq5.dtsi        | 22 +++++++++++++++++++
>  arch/mips/boot/dts/mobileye/eyeq6h.dtsi       | 22 +++++++++++++++++++
>  arch/mips/configs/eyeq5_defconfig             |  2 ++
>  arch/mips/configs/eyeq6_defconfig             |  2 ++
>  drivers/mmc/host/sdhci-cadence.c              | 11 ++++++++++
>  6 files changed, 60 insertions(+)
>

Patch1 and patch2 applied for next, thanks!

Kind regards
Uffe

Re: [PATCH 3/6] MIPS: mobileye: dts: eyeq6h: add the emmc controller

[Gregory CLEMENT]

Hello Benoît,

> Add the MMC/SDHCI controller found in the eyeQ6 SoC. It is based on the
> cadence sd4hc controller and support modes up to HS400 enhanced strobe.
>
> Signed-off-by: Benoît Monin <benoit.monin@bootlin.com>

As the binding had been accpeted and merged:

Acked-by: Gregory CLEMENT <gregory.clement@bootlin.com>

Thanks,

Gregory


> ---
>  arch/mips/boot/dts/mobileye/eyeq6h.dtsi | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)
>
> diff --git a/arch/mips/boot/dts/mobileye/eyeq6h.dtsi b/arch/mips/boot/dts/mobileye/eyeq6h.dtsi
> index dabd5ed778b7..bbd463435ad6 100644
> --- a/arch/mips/boot/dts/mobileye/eyeq6h.dtsi
> +++ b/arch/mips/boot/dts/mobileye/eyeq6h.dtsi
> @@ -109,6 +109,28 @@ olb_east: system-controller@d3358000 {
>  			clock-names = "ref";
>  		};
>  
> +		emmc: sdhci@d8010000 {
> +			compatible = "mobileye,eyeq-sd4hc", "cdns,sd4hc";
> +			reg = <0 0xd8010000 0x0 0x1000>;
> +			interrupt-parent = <&gic>;
> +			interrupts = <GIC_SHARED 91 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&olb_south EQ6HC_SOUTH_DIV_EMMC>;
> +			bus-width = <8>;
> +			max-frequency = <200000000>;
> +			mmc-ddr-1_8v;
> +			sd-uhs-ddr50;
> +			mmc-hs200-1_8v;
> +			mmc-hs400-1_8v;
> +			mmc-hs400-enhanced-strobe;
> +
> +			cdns,phy-input-delay-legacy = <4>;
> +			cdns,phy-input-delay-mmc-highspeed = <2>;
> +			cdns,phy-input-delay-mmc-ddr = <3>;
> +			cdns,phy-dll-delay-sdclk = <32>;
> +			cdns,phy-dll-delay-sdclk-hsmmc = <32>;
> +			cdns,phy-dll-delay-strobe = <32>;
> +		};
> +
>  		olb_south: system-controller@d8013000 {
>  			compatible = "mobileye,eyeq6h-south-olb", "syscon";
>  			reg = <0x0 0xd8013000 0x0 0x1000>;

-- 
Grégory CLEMENT, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

Re: [PATCH 4/6] MIPS: eyeq6_defconfig: add cadence MMC/SDHCI driver

[Gregory CLEMENT]

Hello Benoît,

> Enable MMC support on eyeQ6 platform so it can be used as the root
> partition.
>
> Signed-off-by: Benoît Monin <benoit.monin@bootlin.com>

Acked-by: Gregory CLEMENT <gregory.clement@bootlin.com>

Thanks,

Gregory

> ---
>  arch/mips/configs/eyeq6_defconfig | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/arch/mips/configs/eyeq6_defconfig b/arch/mips/configs/eyeq6_defconfig
> index 0afbb45a78e8..0a00a201937b 100644
> --- a/arch/mips/configs/eyeq6_defconfig
> +++ b/arch/mips/configs/eyeq6_defconfig
> @@ -82,6 +82,8 @@ CONFIG_HID_MICROSOFT=y
>  CONFIG_HID_MONTEREY=y
>  CONFIG_MMC=y
>  CONFIG_MMC_SDHCI=y
> +CONFIG_MMC_SDHCI_PLTFM=y
> +CONFIG_MMC_SDHCI_CADENCE=y
>  # CONFIG_IOMMU_SUPPORT is not set
>  CONFIG_RESET_CONTROLLER=y
>  # CONFIG_NVMEM is not set

-- 
Grégory CLEMENT, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

Re: [PATCH 5/6] MIPS: mobileye: dts: eyeq5: add the emmc controller

[Gregory CLEMENT]

Hello Benoît,

> Add the MMC/SDHCI controller found in the eyeQ5 SoC. It is based on the
> cadence sd4hc controller and support modes up to HS400 enhanced strobe.
>
> Signed-off-by: Benoît Monin <benoit.monin@bootlin.com>

The binding being accepted,

Acked-by: Gregory CLEMENT <gregory.clement@bootlin.com>

Thanks,

Gregory


> ---
>  arch/mips/boot/dts/mobileye/eyeq5.dtsi | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)
>
> diff --git a/arch/mips/boot/dts/mobileye/eyeq5.dtsi b/arch/mips/boot/dts/mobileye/eyeq5.dtsi
> index a84e6e720619..e15d9ce0bdf4 100644
> --- a/arch/mips/boot/dts/mobileye/eyeq5.dtsi
> +++ b/arch/mips/boot/dts/mobileye/eyeq5.dtsi
> @@ -178,6 +178,28 @@ timer {
>  				clocks = <&olb EQ5C_CPU_CORE0>;
>  			};
>  		};
> +
> +		emmc: sdhci@2200000 {
> +			compatible = "mobileye,eyeq-sd4hc", "cdns,sd4hc";
> +			reg = <0 0x2200000 0x0 0x1000>;
> +			interrupt-parent = <&gic>;
> +			interrupts = <GIC_SHARED 10 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&olb EQ5C_PER_EMMC>;
> +			bus-width = <8>;
> +			max-frequency = <200000000>;
> +			mmc-ddr-1_8v;
> +			sd-uhs-ddr50;
> +			mmc-hs200-1_8v;
> +			mmc-hs400-1_8v;
> +			mmc-hs400-enhanced-strobe;
> +
> +			cdns,phy-input-delay-legacy = <4>;
> +			cdns,phy-input-delay-mmc-highspeed = <2>;
> +			cdns,phy-input-delay-mmc-ddr = <3>;
> +			cdns,phy-dll-delay-sdclk = <32>;
> +			cdns,phy-dll-delay-sdclk-hsmmc = <32>;
> +			cdns,phy-dll-delay-strobe = <32>;
> +		};
>  	};
>  };
>  

-- 
Grégory CLEMENT, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

Re: [PATCH 6/6] MIPS: eyeq5_defconfig: add cadence MMC/SDHCI driver

[Gregory CLEMENT]

Helo Benoît,

> Enable MMC support on eyeQ5 platform so it can be used as the root
> partition.
>
> Signed-off-by: Benoît Monin <benoit.monin@bootlin.com>


Acked-by: Gregory CLEMENT <gregory.clement@bootlin.com>

Thanks,

Gregory

> ---
>  arch/mips/configs/eyeq5_defconfig | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/arch/mips/configs/eyeq5_defconfig b/arch/mips/configs/eyeq5_defconfig
> index ff7af5dc6d9d..328016c1c6f4 100644
> --- a/arch/mips/configs/eyeq5_defconfig
> +++ b/arch/mips/configs/eyeq5_defconfig
> @@ -79,6 +79,8 @@ CONFIG_HID_MICROSOFT=y
>  CONFIG_HID_MONTEREY=y
>  CONFIG_MMC=y
>  CONFIG_MMC_SDHCI=y
> +CONFIG_MMC_SDHCI_PLTFM=y
> +CONFIG_MMC_SDHCI_CADENCE=y
>  # CONFIG_IOMMU_SUPPORT is not set
>  CONFIG_RESET_CONTROLLER=y
>  # CONFIG_NVMEM is not set

-- 
Grégory CLEMENT, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

Re: [PATCH 0/6] Add MMC support for Mobileye EyeQ5 and EyeQ6 SoCs

[Thomas Bogendoerfer]

On Tue, Jun 17, 2025 at 03:25:50PM +0200, Benoît Monin wrote:
> The MMC/SDHCI controller found in Mobileye EyeQ5 and EyeQ6 SoCs is 
> based on Cadence cdns sd4hc IP. It supports up to HS400HS mode. The 
> only peculiarity of the hardware is that it needs the preset value
> quirk to configure the clock properly at speed slower than HS200.
> 
> This patchset adds a compatible device tree binding to cdns sdhci for 
> mobileye then uses it in the sdhci-cadence driver.
> 
> It also adds an emmc entry in the dtsi of each SoC and the config 
> options in each defconfig to allow using an eMMC for the rootfs.
> 
> Benoît Monin (6):
>   dt-bindings: mmc: cdns: add Mobileye EyeQ MMC/SDHCI controller
>   mmc: sdhci-cadence: add Mobileye eyeQ support
>   MIPS: mobileye: dts: eyeq6h: add the emmc controller
>   MIPS: eyeq6_defconfig: add cadence MMC/SDHCI driver
>   MIPS: mobileye: dts: eyeq5: add the emmc controller
>   MIPS: eyeq5_defconfig: add cadence MMC/SDHCI driver
> 
>  .../devicetree/bindings/mmc/cdns,sdhci.yaml   |  1 +
>  arch/mips/boot/dts/mobileye/eyeq5.dtsi        | 22 +++++++++++++++++++
>  arch/mips/boot/dts/mobileye/eyeq6h.dtsi       | 22 +++++++++++++++++++
>  arch/mips/configs/eyeq5_defconfig             |  2 ++
>  arch/mips/configs/eyeq6_defconfig             |  2 ++
>  drivers/mmc/host/sdhci-cadence.c              | 11 ++++++++++
>  6 files changed, 60 insertions(+)

applied patches 3-6 to mips-next.

Thomas.

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]