[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

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