From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Enable DMA support for RSPI channels.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 arch/arm64/boot/dts/renesas/r9a09g057.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r9a09g057.dtsi b/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
index 8b8ed4fbb599..9587733ce04a 100644
--- a/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
+++ b/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
@@ -705,6 +705,8 @@ rspi0: spi@12800000 {
 			clock-names = "pclk", "pclk_sfr", "tclk";
 			resets = <&cpg 0x7b>, <&cpg 0x7c>;
 			reset-names = "presetn", "tresetn";
+			dmas = <&dmac0 0x448c>, <&dmac0 0x448d>;
+			dma-names = "rx", "tx";
 			power-domains = <&cpg>;
 			#address-cells = <1>;
 			#size-cells = <0>;
@@ -726,6 +728,8 @@ rspi1: spi@12800400 {
 			clock-names = "pclk", "pclk_sfr", "tclk";
 			resets = <&cpg 0x7d>, <&cpg 0x7e>;
 			reset-names = "presetn", "tresetn";
+			dmas = <&dmac0 0x448e>, <&dmac0 0x448f>;
+			dma-names = "rx", "tx";
 			power-domains = <&cpg>;
 			#address-cells = <1>;
 			#size-cells = <0>;
@@ -747,6 +751,8 @@ rspi2: spi@12800800 {
 			clock-names = "pclk", "pclk_sfr", "tclk";
 			resets = <&cpg 0x7f>, <&cpg 0x80>;
 			reset-names = "presetn", "tresetn";
+			dmas = <&dmac0 0x4490>, <&dmac0 0x4491>;
+			dma-names = "rx", "tx";
 			power-domains = <&cpg>;
 			#address-cells = <1>;
 			#size-cells = <0>;
-- 
2.52.0

Hi Prabhakar,

On Mon, 15 Dec 2025 at 17:34, Prabhakar <prabhakar.csengg@gmail.com> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>
> Enable DMA support for RSPI channels.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Thanks for your patch!

> --- a/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
> +++ b/arch/arm64/boot/dts/renesas/r9a09g057.dtsi
> @@ -705,6 +705,8 @@ rspi0: spi@12800000 {
>                         clock-names = "pclk", "pclk_sfr", "tclk";
>                         resets = <&cpg 0x7b>, <&cpg 0x7c>;
>                         reset-names = "presetn", "tresetn";
> +                       dmas = <&dmac0 0x448c>, <&dmac0 0x448d>;
> +                       dma-names = "rx", "tx";

RZ/V2N does not seem to have restrictions about which DMA controllers
can be used by which SPI instance.  Hence shouldn't these point to
all five DMA controllers?

    dmas = <&dmac0 0x448c>, <&dmac0 0x448d>,
           <&dmac1 0x448c>, <&dmac1 0x448d>,
           <&dmac2 0x448c>, <&dmac2 0x448d>,
           <&dmac3 0x448c>, <&dmac3 0x448d>,
           <&dmac4 0x448c>, <&dmac4 0x448d>;
    dma-names = "rx", "tx", "rx", "tx", "rx", "tx",
                "rx", "tx", "rx", "tx";

Note that this requires updating the DT bindings, as they currently
restrict dma to two entries.

The actual DMA specifier values are OK, so
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

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