[PATCH 1/2 v2] dt-bindings: Create DT bindings for [PS]ATA controllers

[PATCH 1/2 v2] dt-bindings: Create DT bindings for [PS]ATA controllers

[Linus Walleij]

I need to create subnodes for drives connected to PATA
or SATA host controllers, and this needs to be supported
generally, so create a common YAML binding for
"ide" or "sata" that will support subnodes with ports.

This has been designed as a subset of
ata/pata-sata-common.yaml with the bare essentials and
should be possible to extend or superset to cover the
common bindings.

Cc: Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v1->v2:
- Use ide@ and sata@ as node names.
- Use ide-port@ and sata-port@ for the ports toward the
  drives, rather than letting the subnodes be the drives
  themselves.
---
 .../bindings/ata/pata-sata-common.yaml        | 51 +++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/ata/pata-sata-common.yaml

diff --git a/Documentation/devicetree/bindings/ata/pata-sata-common.yaml b/Documentation/devicetree/bindings/ata/pata-sata-common.yaml
new file mode 100644
index 000000000000..f46f04446607
--- /dev/null
+++ b/Documentation/devicetree/bindings/ata/pata-sata-common.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/ata/pata-sata-common.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Common Properties for Parallel and Serial AT attachment controllers
+
+maintainers:
+  - Linus Walleij <linus.walleij@linaro.org>
+
+description: |
+  This document defines device tree properties common to most Parallel
+  (PATA, also known as IDE) and Serial (SATA) AT attachment storage devices.
+  It doesn't constitue a device tree binding specification by itself but is
+  meant to be referenced by device tree bindings.
+
+  The PATA/SATA controller device tree bindings are responsible for
+  defining whether each property is required or optional.
+
+properties:
+  $nodename:
+    pattern: "^(ide|sata)(@.*)?$"
+    description:
+      Specifies the host controller node. PATA host controller nodes are named
+      "ide" and SATA controller nodes are named "sata"
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  "^(ide|sata)-port@[0-1]$":
+    description: |
+      DT nodes for ports connected on the PATA or SATA host. The master drive
+      will have ID number 0 and the slave drive will have ID number 1.
+      The PATA port nodes will be named "ide-port" and the SATA port nodes will
+      be named "sata-port".
+    type: object
+
+    properties:
+      reg:
+        minimum: 0
+        maximum: 1
+        description:
+          The ID number of the drive port, 0 for the master port and 1 for the
+          slave port.
+
+...
-- 
2.21.0

[PATCH 2/2 v2] dt-bindings: Convert Faraday FTIDE010 to DT schema

[Linus Walleij]

This uses the new pata-sata-controller.yaml schema to
convert the Faraday FTIDE010 to DT schema.

Cc: Rob Herring <robh+dt@kernel.org>
Cc: device@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
ChangeLog v1->v2:
- Rename the node for the example controller to "ide@"
- Rename the drives to ports, so ide-port@0 etc instead of
  drive@0.
---
 .../bindings/ata/faraday,ftide010.txt         | 38 --------
 .../bindings/ata/faraday,ftide010.yaml        | 89 +++++++++++++++++++
 2 files changed, 89 insertions(+), 38 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/ata/faraday,ftide010.txt
 create mode 100644 Documentation/devicetree/bindings/ata/faraday,ftide010.yaml

diff --git a/Documentation/devicetree/bindings/ata/faraday,ftide010.txt b/Documentation/devicetree/bindings/ata/faraday,ftide010.txt
deleted file mode 100644
index a0c64a29104d..000000000000
--- a/Documentation/devicetree/bindings/ata/faraday,ftide010.txt
+++ /dev/null
@@ -1,38 +0,0 @@
-* Faraday Technology FTIDE010 PATA controller
-
-This controller is the first Faraday IDE interface block, used in the
-StorLink SL2312 and SL3516, later known as the Cortina Systems Gemini
-platform. The controller can do PIO modes 0 through 4, Multi-word DMA
-(MWDM)modes 0 through 2 and Ultra DMA modes 0 through 6.
-
-On the Gemini platform, this PATA block is accompanied by a PATA to
-SATA bridge in order to support SATA. This is why a phandle to that
-controller is compulsory on that platform.
-
-The timing properties are unique per-SoC, not per-board.
-
-Required properties:
-- compatible: should be one of
-  "cortina,gemini-pata", "faraday,ftide010"
-  "faraday,ftide010"
-- interrupts: interrupt for the block
-- reg: registers and size for the block
-
-Optional properties:
-- clocks: a SoC clock running the peripheral.
-- clock-names: should be set to "PCLK" for the peripheral clock.
-
-Required properties for "cortina,gemini-pata" compatible:
-- sata: a phande to the Gemini PATA to SATA bridge, see
-  cortina,gemini-sata-bridge.txt for details.
-
-Example:
-
-ata@63000000 {
-	compatible = "cortina,gemini-pata", "faraday,ftide010";
-	reg = <0x63000000 0x100>;
-	interrupts = <4 IRQ_TYPE_EDGE_RISING>;
-	clocks = <&gcc GEMINI_CLK_GATE_IDE>;
-	clock-names = "PCLK";
-	sata = <&sata>;
-};
diff --git a/Documentation/devicetree/bindings/ata/faraday,ftide010.yaml b/Documentation/devicetree/bindings/ata/faraday,ftide010.yaml
new file mode 100644
index 000000000000..f7b9b625c0f2
--- /dev/null
+++ b/Documentation/devicetree/bindings/ata/faraday,ftide010.yaml
@@ -0,0 +1,89 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/ata/faraday,ftide010.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Faraday Technology FTIDE010 PATA controller
+
+maintainers:
+  - Linus Walleij <linus.walleij@linaro.org>
+
+description: |
+  This controller is the first Faraday IDE interface block, used in the
+  StorLink SL3512 and SL3516, later known as the Cortina Systems Gemini
+  platform. The controller can do PIO modes 0 through 4, Multi-word DMA
+  (MWDM) modes 0 through 2 and Ultra DMA modes 0 through 6.
+
+  On the Gemini platform, this PATA block is accompanied by a PATA to
+  SATA bridge in order to support SATA. This is why a phandle to that
+  controller is compulsory on that platform.
+
+  The timing properties are unique per-SoC, not per-board.
+
+properties:
+  compatible:
+    oneOf:
+      - const: faraday,ftide010
+      - items:
+        - const: cortina,gemini-pata
+        - const: faraday,ftide010
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+
+  clock-names:
+    const: PCLK
+
+  sata:
+    description:
+      phandle to the Gemini PATA to SATA bridge, if available
+    $ref: /schemas/types.yaml#/definitions/phandle
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+allOf:
+  - $ref: pata-sata-common.yaml#
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: cortina,gemini-pata
+
+    then:
+      required:
+        - sata
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/clock/cortina,gemini-clock.h>
+
+    ide@63000000 {
+      compatible = "cortina,gemini-pata", "faraday,ftide010";
+      reg = <0x63000000 0x100>;
+      interrupts = <4 IRQ_TYPE_EDGE_RISING>;
+      clocks = <&gcc GEMINI_CLK_GATE_IDE>;
+      clock-names = "PCLK";
+      sata = <&sata>;
+      #address-cells = <1>;
+      #size-cells = <0>;
+      ide-port@0 {
+        reg = <0>;
+      };
+      ide-port@1 {
+        reg = <1>;
+      };
+    };
+
+...
-- 
2.21.0

Re: [PATCH 1/2 v2] dt-bindings: Create DT bindings for [PS]ATA controllers

[Rob Herring]

On Mon, Jan 06, 2020 at 02:42:23AM +0100, Linus Walleij wrote:
> I need to create subnodes for drives connected to PATA
> or SATA host controllers, and this needs to be supported
> generally, so create a common YAML binding for
> "ide" or "sata" that will support subnodes with ports.
> 
> This has been designed as a subset of
> ata/pata-sata-common.yaml with the bare essentials and
> should be possible to extend or superset to cover the
> common bindings.
> 
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: devicetree@vger.kernel.org
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
> ChangeLog v1->v2:
> - Use ide@ and sata@ as node names.
> - Use ide-port@ and sata-port@ for the ports toward the
>   drives, rather than letting the subnodes be the drives
>   themselves.
> ---
>  .../bindings/ata/pata-sata-common.yaml        | 51 +++++++++++++++++++
>  1 file changed, 51 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/ata/pata-sata-common.yaml
> 
> diff --git a/Documentation/devicetree/bindings/ata/pata-sata-common.yaml b/Documentation/devicetree/bindings/ata/pata-sata-common.yaml
> new file mode 100644
> index 000000000000..f46f04446607
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/ata/pata-sata-common.yaml
> @@ -0,0 +1,51 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/ata/pata-sata-common.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Common Properties for Parallel and Serial AT attachment controllers
> +
> +maintainers:
> +  - Linus Walleij <linus.walleij@linaro.org>
> +
> +description: |
> +  This document defines device tree properties common to most Parallel
> +  (PATA, also known as IDE) and Serial (SATA) AT attachment storage devices.
> +  It doesn't constitue a device tree binding specification by itself but is
> +  meant to be referenced by device tree bindings.
> +
> +  The PATA/SATA controller device tree bindings are responsible for
> +  defining whether each property is required or optional.
> +
> +properties:
> +  $nodename:
> +    pattern: "^(ide|sata)(@.*)?$"
> +    description:
> +      Specifies the host controller node. PATA host controller nodes are named
> +      "ide" and SATA controller nodes are named "sata"
> +
> +  "#address-cells":
> +    const: 1
> +
> +  "#size-cells":
> +    const: 0
> +
> +patternProperties:
> +  "^(ide|sata)-port@[0-1]$":

This would allow ide@... to have sata-port@... as a child node.

> +    description: |
> +      DT nodes for ports connected on the PATA or SATA host. The master drive
> +      will have ID number 0 and the slave drive will have ID number 1.
> +      The PATA port nodes will be named "ide-port" and the SATA port nodes will
> +      be named "sata-port".
> +    type: object
> +
> +    properties:
> +      reg:
> +        minimum: 0
> +        maximum: 1

For SATA, we can have more than 2.

Given both of the above, probably this should be split into 2 files.

Rob