[PATCH v3 0/3] ARM: dts: renesas: r9a06g032-rzn1d400-eb: Enable SPI and FRAM

[PATCH v3 0/3] ARM: dts: renesas: r9a06g032-rzn1d400-eb: Enable SPI and FRAM

[Wolfram Sang]

Here are the patches to enable the SPI-FRAM with FIFO (no DMA yet, needs
more work) on the RZ/N1D Extension board.

Changes since v2 in the individual patches.

A branch is here:

git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git renesas/n1d/enablement


Wolfram Sang (3):
  spi: dt-bindings: snps,dw-apb-ssi: add 'power-domains' property
  ARM: dts: renesas: r9a06g032: Describe SPI controllers
  ARM: dts: renesas: r9a06g032-rzn1d400-eb: Enable SPI-FRAM

 .../bindings/spi/snps,dw-apb-ssi.yaml         |  3 +
 .../dts/renesas/r9a06g032-rzn1d400-eb.dts     | 25 ++++++
 arch/arm/boot/dts/renesas/r9a06g032.dtsi      | 84 +++++++++++++++++++
 3 files changed, 112 insertions(+)

-- 
2.47.3

[PATCH v3 1/3] spi: dt-bindings: snps,dw-apb-ssi: add 'power-domains' property

[Wolfram Sang]

On the Renesas RZ/N1D SoC, this SPI controller belongs to a power
domain. Enable the property to describe it in DTs.

Reported-by: Herve Codina <herve.codina@bootlin.com>
Closes: https://lore.kernel.org/r/20260622132842.7e0d772c@bootlin.com
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---

Change since v2:
* new patch (Thanks, Herve!)

 Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
index 8ebebcebca16..3896ee02d7b6 100644
--- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
+++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
@@ -88,6 +88,9 @@ properties:
       - const: ssi_clk
       - const: pclk
 
+  power-domains:
+    maxItems: 1
+
   resets:
     maxItems: 1
 
-- 
2.47.3

[PATCH v3 2/3] ARM: dts: renesas: r9a06g032: Describe SPI controllers

[Wolfram Sang]

Add nodes for the 6 SPI controllers of the Renesas RZ/N1D SoC. The first
4 can only be controllers, the latter 2 can only be targets. DMA nodes
are not added yet because DMA needs some extra code in the drivers and
cannot be tested yet. Basic FIFO mode works reliably, though.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Herve Codina <herve.codina@bootlin.com>
---

Change since v2:
* tag added (Thanks, Herve!)

 arch/arm/boot/dts/renesas/r9a06g032.dtsi | 84 ++++++++++++++++++++++++
 1 file changed, 84 insertions(+)

diff --git a/arch/arm/boot/dts/renesas/r9a06g032.dtsi b/arch/arm/boot/dts/renesas/r9a06g032.dtsi
index 442ea26b40f5..19c9bce0a26d 100644
--- a/arch/arm/boot/dts/renesas/r9a06g032.dtsi
+++ b/arch/arm/boot/dts/renesas/r9a06g032.dtsi
@@ -563,6 +563,90 @@ gic: interrupt-controller@44101000 {
 				<GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_HIGH)>;
 		};
 
+		/* Controller only */
+		spi1: spi@50005000 {
+			compatible = "renesas,r9a06g032-spi", "renesas,rzn1-spi";
+			reg = <0x50005000 0x200>;
+			interrupts = <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&sysctrl R9A06G032_CLK_SPI0>, <&sysctrl R9A06G032_HCLK_SPI0>;
+			clock-names = "ssi_clk", "pclk";
+			power-domains = <&sysctrl>;
+			num-cs = <4>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+		};
+
+		/* Controller only */
+		spi2: spi@50006000 {
+			compatible = "renesas,r9a06g032-spi", "renesas,rzn1-spi";
+			reg = <0x50006000 0x200>;
+			interrupts = <GIC_SPI 81 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&sysctrl R9A06G032_CLK_SPI1>, <&sysctrl R9A06G032_HCLK_SPI1>;
+			clock-names = "ssi_clk", "pclk";
+			power-domains = <&sysctrl>;
+			num-cs = <4>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+		};
+
+		/* Controller only */
+		spi3: spi@50007000 {
+			compatible = "renesas,r9a06g032-spi", "renesas,rzn1-spi";
+			reg = <0x50007000 0x200>;
+			interrupts = <GIC_SPI 82 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&sysctrl R9A06G032_CLK_SPI2>, <&sysctrl R9A06G032_HCLK_SPI2>;
+			clock-names = "ssi_clk", "pclk";
+			power-domains = <&sysctrl>;
+			num-cs = <4>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+		};
+
+		/* Controller only */
+		spi4: spi@50008000 {
+			compatible = "renesas,r9a06g032-spi", "renesas,rzn1-spi";
+			reg = <0x50008000 0x200>;
+			interrupts = <GIC_SPI 83 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&sysctrl R9A06G032_CLK_SPI3>, <&sysctrl R9A06G032_HCLK_SPI3>;
+			clock-names = "ssi_clk", "pclk";
+			power-domains = <&sysctrl>;
+			num-cs = <4>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			status = "disabled";
+		};
+
+		/* Target only */
+		spi5: spi@50009000 {
+			compatible = "renesas,r9a06g032-spi", "renesas,rzn1-spi";
+			reg = <0x50009000 0x200>;
+			interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&sysctrl R9A06G032_CLK_SPI4>, <&sysctrl R9A06G032_HCLK_SPI4>;
+			clock-names = "ssi_clk", "pclk";
+			power-domains = <&sysctrl>;
+			spi-slave;
+			#address-cells = <0>;
+			#size-cells = <0>;
+			status = "disabled";
+		};
+
+		/* Target only */
+		spi6: spi@5000a000 {
+			compatible = "renesas,r9a06g032-spi", "renesas,rzn1-spi";
+			reg = <0x5000a000 0x200>;
+			interrupts = <GIC_SPI 85 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&sysctrl R9A06G032_CLK_SPI5>, <&sysctrl R9A06G032_HCLK_SPI5>;
+			clock-names = "ssi_clk", "pclk";
+			power-domains = <&sysctrl>;
+			spi-slave;
+			#address-cells = <0>;
+			#size-cells = <0>;
+			status = "disabled";
+		};
+
 		/*
 		 * The GPIO mapping to the corresponding pins is not obvious.
 		 * See the hardware documentation for details.
-- 
2.47.3

[PATCH v3 3/3] ARM: dts: renesas: r9a06g032-rzn1d400-eb: Enable SPI-FRAM

[Wolfram Sang]

Activate the FRAM and the SPI bus which it is attached to.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
---

Change since v2:
* none

 .../dts/renesas/r9a06g032-rzn1d400-eb.dts     | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/arch/arm/boot/dts/renesas/r9a06g032-rzn1d400-eb.dts b/arch/arm/boot/dts/renesas/r9a06g032-rzn1d400-eb.dts
index 97a339b30d76..ead379988fb1 100644
--- a/arch/arm/boot/dts/renesas/r9a06g032-rzn1d400-eb.dts
+++ b/arch/arm/boot/dts/renesas/r9a06g032-rzn1d400-eb.dts
@@ -53,6 +53,10 @@ led@1 {
 	};
 };
 
+&gpio2 {
+	status = "okay";
+};
+
 &i2c2 {
 	/* Sensors are different across revisions. All are LM75B compatible */
 	sensor@49 {
@@ -152,6 +156,13 @@ pins_sdio1_clk: pins-sdio1-clk {
 		drive-strength = <12>;
 	};
 
+	pins_spi1: pins-spi1 {
+		pinmux = <RZN1_PINMUX(156, RZN1_FUNC_SPI0_M)>,
+			 <RZN1_PINMUX(157, RZN1_FUNC_SPI0_M)>,
+			 <RZN1_PINMUX(158, RZN1_FUNC_SPI0_M)>,
+			 <RZN1_PINMUX(159, RZN1_FUNC_GPIO)>;
+	};
+
 	pins_uart2: pins-uart2 {
 		pinmux = <RZN1_PINMUX(105, RZN1_FUNC_UART2)>,
 			 <RZN1_PINMUX(106, RZN1_FUNC_UART2)>,
@@ -168,6 +179,20 @@ &sdio1 {
 	status = "okay";
 };
 
+&spi1 {
+	pinctrl-0 = <&pins_spi1>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	cs-gpios = <&gpio2a 31 GPIO_ACTIVE_LOW>;
+
+	fram: fram@0 {
+		compatible = "cypress,fm25", "atmel,at25";
+		reg = <0>;
+		spi-max-frequency = <12500000>;
+	};
+};
+
 &switch {
 	pinctrl-0 = <&pins_eth1>, <&pins_eth2>, <&pins_eth3>, <&pins_eth4>,
 		    <&pins_mdio1>;
-- 
2.47.3

Re: [PATCH v3 1/3] spi: dt-bindings: snps,dw-apb-ssi: add 'power-domains' property

[Herve Codina]

Hi Wolfram,

On Mon, 22 Jun 2026 19:48:07 +0200
Wolfram Sang <wsa+renesas@sang-engineering.com> wrote:

> On the Renesas RZ/N1D SoC, this SPI controller belongs to a power
> domain. Enable the property to describe it in DTs.
> 
> Reported-by: Herve Codina <herve.codina@bootlin.com>
> Closes: https://lore.kernel.org/r/20260622132842.7e0d772c@bootlin.com
> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> ---
> 
> Change since v2:
> * new patch (Thanks, Herve!)
> 
>  Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
> index 8ebebcebca16..3896ee02d7b6 100644
> --- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
> +++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
> @@ -88,6 +88,9 @@ properties:
>        - const: ssi_clk
>        - const: pclk
>  
> +  power-domains:
> +    maxItems: 1
> +
>    resets:
>      maxItems: 1
>  

Reviewed-by: Herve Codina <herve.codina@bootlin.com>

Best regards,
Hervé

Re: [PATCH v3 1/3] spi: dt-bindings: snps,dw-apb-ssi: add 'power-domains' property

[Krzysztof Kozlowski]

On Mon, Jun 22, 2026 at 07:48:07PM +0200, Wolfram Sang wrote:
> On the Renesas RZ/N1D SoC, this SPI controller belongs to a power
> domain. Enable the property to describe it in DTs.
> 
> Reported-by: Herve Codina <herve.codina@bootlin.com>

No bug to be fixed here. Usually incomplete hardware description is not
a reported bug.

> Closes: https://lore.kernel.org/r/20260622132842.7e0d772c@bootlin.com

> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> ---
> 
> Change since v2:
> * new patch (Thanks, Herve!)
> 
>  Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
> index 8ebebcebca16..3896ee02d7b6 100644
> --- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
> +++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
> @@ -88,6 +88,9 @@ properties:
>        - const: ssi_clk
>        - const: pclk
>  
> +  power-domains:
> +    maxItems: 1

You should explain in the commit msg that likely other devices belong to
power domain as well or likely can belong. Otherwise based on the commit
msg I would suggest restricting it per variant... except that indeed
these other variants could have a power domain.

Best regards,
Krzysztof