[PATCH 0/4] serial: sh-sci: Add DMA support to the DT binding

[PATCH 0/4] serial: sh-sci: Add DMA support to the DT binding

[Geert Uytterhoeven]

	Hi Greg, Simon, Magnus,

This patch series adds DMA support to the DT binding documentation for
the various Renesas (H)SCI(F{,A,B}) serial ports, and adds the
corresponding properties to the Renesas R-Car Gen2 DT source files.

  - Patch 1 updates the DT binding documentation.
  - Patches 2-4 update the dtsi files.

Although the sh-sci driver itself doesn't support DT DMA properties
yet, it's safe to apply patches 2-4, as DT describes the hardware, not
the (current) features of the Linux driver implementation.

Thanks!

Geert Uytterhoeven (4):
  serial: sh-sci: Add DMA support to the DT binding documentation
  ARM: shmobile: r8a7790 dtsi: Describe DMA for the serial ports
  ARM: shmobile: r8a7791 dtsi: Describe DMA for the serial ports
  ARM: shmobile: r8a7794 dtsi: Describe DMA for the serial ports

 .../bindings/serial/renesas,sci-serial.txt         |  7 +++++
 arch/arm/boot/dts/r8a7790.dtsi                     | 20 ++++++++++++
 arch/arm/boot/dts/r8a7791.dtsi                     | 36 ++++++++++++++++++++++
 arch/arm/boot/dts/r8a7794.dtsi                     | 36 ++++++++++++++++++++++
 4 files changed, 99 insertions(+)

-- 
1.9.1

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

[PATCH 1/4] serial: sh-sci: Add DMA support to the DT binding documentation

[Geert Uytterhoeven]

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
 Documentation/devicetree/bindings/serial/renesas,sci-serial.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/serial/renesas,sci-serial.txt b/Documentation/devicetree/bindings/serial/renesas,sci-serial.txt
index ae73bb0e9ad9e58b..b91fcff4b7d48133 100644
--- a/Documentation/devicetree/bindings/serial/renesas,sci-serial.txt
+++ b/Documentation/devicetree/bindings/serial/renesas,sci-serial.txt
@@ -44,6 +44,11 @@ Required properties:
 Note: Each enabled SCIx UART should have an alias correctly numbered in the
 "aliases" node.
 
+Optional properties:
+  - dmas: Must contain a list of two references to DMA specifiers, one for
+	  transmission, and one for reception.
+  - dma-names: Must contain a list of two DMA names, "tx" and "rx".
+
 Example:
 	aliases {
 		serial0 = &scifa0;
@@ -56,4 +61,6 @@ Example:
 		interrupts = <0 144 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A7790_CLK_SCIFA0>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x21>, <&dmac0 0x22>;
+		dma-names = "tx", "rx";
 	};
-- 
1.9.1

[PATCH 2/4] ARM: shmobile: r8a7790 dtsi: Describe DMA for the serial ports

[Geert Uytterhoeven]

Add DMA properties to all SCIF, SCIFA, SCIFB, and HSCIF device nodes.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
 arch/arm/boot/dts/r8a7790.dtsi | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/arch/arm/boot/dts/r8a7790.dtsi b/arch/arm/boot/dts/r8a7790.dtsi
index 62a9086b133d5b91..6ef146d9384da332 100644
--- a/arch/arm/boot/dts/r8a7790.dtsi
+++ b/arch/arm/boot/dts/r8a7790.dtsi
@@ -554,6 +554,8 @@
 		interrupts = <0 144 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A7790_CLK_SCIFA0>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x21>, <&dmac0 0x22>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -563,6 +565,8 @@
 		interrupts = <0 145 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A7790_CLK_SCIFA1>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x25>, <&dmac0 0x26>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -572,6 +576,8 @@
 		interrupts = <0 151 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A7790_CLK_SCIFA2>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x27>, <&dmac0 0x28>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -581,6 +587,8 @@
 		interrupts = <0 148 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A7790_CLK_SCIFB0>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x3d>, <&dmac0 0x3e>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -590,6 +598,8 @@
 		interrupts = <0 149 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A7790_CLK_SCIFB1>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x19>, <&dmac0 0x1a>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -599,6 +609,8 @@
 		interrupts = <0 150 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A7790_CLK_SCIFB2>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x1d>, <&dmac0 0x1e>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -608,6 +620,8 @@
 		interrupts = <0 152 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7790_CLK_SCIF0>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x29>, <&dmac0 0x2a>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -617,6 +631,8 @@
 		interrupts = <0 153 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7790_CLK_SCIF1>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x2d>, <&dmac0 0x2e>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -626,6 +642,8 @@
 		interrupts = <0 154 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7790_CLK_HSCIF0>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x39>, <&dmac0 0x3a>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -635,6 +653,8 @@
 		interrupts = <0 155 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7790_CLK_HSCIF1>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x4d>, <&dmac0 0x4e>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
-- 
1.9.1

[PATCH 3/4] ARM: shmobile: r8a7791 dtsi: Describe DMA for the serial ports

[Geert Uytterhoeven]

Add DMA properties to all SCIF, SCIFA, SCIFB, and HSCIF device nodes.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
 arch/arm/boot/dts/r8a7791.dtsi | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/arch/arm/boot/dts/r8a7791.dtsi b/arch/arm/boot/dts/r8a7791.dtsi
index 7613abea13d79037..7e79e01202f80dac 100644
--- a/arch/arm/boot/dts/r8a7791.dtsi
+++ b/arch/arm/boot/dts/r8a7791.dtsi
@@ -532,6 +532,8 @@
 		interrupts = <0 144 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A7791_CLK_SCIFA0>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x21>, <&dmac0 0x22>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -541,6 +543,8 @@
 		interrupts = <0 145 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A7791_CLK_SCIFA1>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x25>, <&dmac0 0x26>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -550,6 +554,8 @@
 		interrupts = <0 151 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A7791_CLK_SCIFA2>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x27>, <&dmac0 0x28>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -559,6 +565,8 @@
 		interrupts = <0 29 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp11_clks R8A7791_CLK_SCIFA3>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x1b>, <&dmac0 0x1c>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -568,6 +576,8 @@
 		interrupts = <0 30 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp11_clks R8A7791_CLK_SCIFA4>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x1f>, <&dmac0 0x20>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -577,6 +587,8 @@
 		interrupts = <0 31 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp11_clks R8A7791_CLK_SCIFA5>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x23>, <&dmac0 0x24>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -586,6 +598,8 @@
 		interrupts = <0 148 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A7791_CLK_SCIFB0>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x3d>, <&dmac0 0x3e>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -595,6 +609,8 @@
 		interrupts = <0 149 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A7791_CLK_SCIFB1>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x19>, <&dmac0 0x1a>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -604,6 +620,8 @@
 		interrupts = <0 150 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A7791_CLK_SCIFB2>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x1d>, <&dmac0 0x1e>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -613,6 +631,8 @@
 		interrupts = <0 152 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7791_CLK_SCIF0>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x29>, <&dmac0 0x2a>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -622,6 +642,8 @@
 		interrupts = <0 153 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7791_CLK_SCIF1>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x2d>, <&dmac0 0x2e>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -631,6 +653,8 @@
 		interrupts = <0 22 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7791_CLK_SCIF2>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x2b>, <&dmac0 0x2c>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -640,6 +664,8 @@
 		interrupts = <0 23 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7791_CLK_SCIF3>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x2f>, <&dmac0 0x30>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -649,6 +675,8 @@
 		interrupts = <0 24 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7791_CLK_SCIF4>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0xfb>, <&dmac0 0xfc>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -658,6 +686,8 @@
 		interrupts = <0 25 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7791_CLK_SCIF5>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0xfd>, <&dmac0 0xfe>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -667,6 +697,8 @@
 		interrupts = <0 154 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7791_CLK_HSCIF0>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x39>, <&dmac0 0x3a>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -676,6 +708,8 @@
 		interrupts = <0 155 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7791_CLK_HSCIF1>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x4d>, <&dmac0 0x4e>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -685,6 +719,8 @@
 		interrupts = <0 21 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7791_CLK_HSCIF2>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x3b>, <&dmac0 0x3c>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
-- 
1.9.1

[PATCH 4/4] ARM: shmobile: r8a7794 dtsi: Describe DMA for the serial ports

[Geert Uytterhoeven]

Add DMA properties to all SCIF, SCIFA, SCIFB, and HSCIF device nodes.

Signed-off-by: Geert Uytterhoeven <geert+renesas-gXvu3+zWzMSzQB+pC5nmwQ@public.gmane.org>
---
 arch/arm/boot/dts/r8a7794.dtsi | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/arch/arm/boot/dts/r8a7794.dtsi b/arch/arm/boot/dts/r8a7794.dtsi
index 01cf54f70501e8c2..b738194233113402 100644
--- a/arch/arm/boot/dts/r8a7794.dtsi
+++ b/arch/arm/boot/dts/r8a7794.dtsi
@@ -174,6 +174,8 @@
 		interrupts = <0 144 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A7794_CLK_SCIFA0>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x21>, <&dmac0 0x22>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -183,6 +185,8 @@
 		interrupts = <0 145 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A7794_CLK_SCIFA1>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x25>, <&dmac0 0x26>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -192,6 +196,8 @@
 		interrupts = <0 151 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A7794_CLK_SCIFA2>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x27>, <&dmac0 0x28>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -201,6 +207,8 @@
 		interrupts = <0 29 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp11_clks R8A7794_CLK_SCIFA3>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x1b>, <&dmac0 0x1c>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -210,6 +218,8 @@
 		interrupts = <0 30 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp11_clks R8A7794_CLK_SCIFA4>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x1f>, <&dmac0 0x20>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -219,6 +229,8 @@
 		interrupts = <0 31 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp11_clks R8A7794_CLK_SCIFA5>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x23>, <&dmac0 0x24>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -228,6 +240,8 @@
 		interrupts = <0 148 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A7794_CLK_SCIFB0>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x3d>, <&dmac0 0x3e>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -237,6 +251,8 @@
 		interrupts = <0 149 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A7794_CLK_SCIFB1>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x19>, <&dmac0 0x1a>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -246,6 +262,8 @@
 		interrupts = <0 150 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A7794_CLK_SCIFB2>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x1d>, <&dmac0 0x1e>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -255,6 +273,8 @@
 		interrupts = <0 152 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7794_CLK_SCIF0>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x29>, <&dmac0 0x2a>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -264,6 +284,8 @@
 		interrupts = <0 153 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7794_CLK_SCIF1>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x2d>, <&dmac0 0x2e>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -273,6 +295,8 @@
 		interrupts = <0 22 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7794_CLK_SCIF2>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x2b>, <&dmac0 0x2c>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -282,6 +306,8 @@
 		interrupts = <0 23 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7794_CLK_SCIF3>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x2f>, <&dmac0 0x30>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -291,6 +317,8 @@
 		interrupts = <0 24 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7794_CLK_SCIF4>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0xfb>, <&dmac0 0xfc>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -300,6 +328,8 @@
 		interrupts = <0 25 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7794_CLK_SCIF5>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0xfd>, <&dmac0 0xfe>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -309,6 +339,8 @@
 		interrupts = <0 154 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7794_CLK_HSCIF0>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x39>, <&dmac0 0x3a>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -318,6 +350,8 @@
 		interrupts = <0 155 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7794_CLK_HSCIF1>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x4d>, <&dmac0 0x4e>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
@@ -327,6 +361,8 @@
 		interrupts = <0 21 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7794_CLK_HSCIF2>;
 		clock-names = "sci_ick";
+		dmas = <&dmac0 0x3b>, <&dmac0 0x3c>;
+		dma-names = "tx", "rx";
 		status = "disabled";
 	};
 
-- 
1.9.1

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Re: [PATCH 0/4] serial: sh-sci: Add DMA support to the DT binding

[Simon Horman]

Hi Geert,

On Wed, May 20, 2015 at 07:46:23PM +0200, Geert Uytterhoeven wrote:
> 	Hi Greg, Simon, Magnus,
> 
> This patch series adds DMA support to the DT binding documentation for
> the various Renesas (H)SCI(F{,A,B}) serial ports, and adds the
> corresponding properties to the Renesas R-Car Gen2 DT source files.
> 
>   - Patch 1 updates the DT binding documentation.
>   - Patches 2-4 update the dtsi files.
> 
> Although the sh-sci driver itself doesn't support DT DMA properties
> yet, it's safe to apply patches 2-4, as DT describes the hardware, not
> the (current) features of the Linux driver implementation.

I would prefer for the new binding (documentation) to be accepted before
updating the DT files.