[PATCH v4 0/5] Add r8a77965 DRIF support

[PATCH v4 0/5] Add r8a77965 DRIF support

[Fabrizio Castro]

Dear All,

this series is to add DRIF support for the r8a77965
(a.k.a. R-Car M3-N). Version 4 improves the DT schema
for DRIF, as suggested by Geert.

Thanks,
Fab

Fabrizio Castro (5):
  MAINTAINERS: Update MAINTAINERS for Renesas DRIF driver
  media: dt-bindings: media: renesas,drif: Convert to json-schema
  media: dt-bindings: media: renesas,drif: Add r8a77990 support
  media: dt-bindings: media: renesas,drif: Add r8a77965 support
  arm64: dts: r8a77965: Add DRIF support

 .../bindings/media/renesas,drif.txt           | 177 -----------
 .../bindings/media/renesas,drif.yaml          | 279 ++++++++++++++++++
 MAINTAINERS                                   |   4 +-
 arch/arm64/boot/dts/renesas/r8a77965.dtsi     | 120 ++++++++
 4 files changed, 401 insertions(+), 179 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/media/renesas,drif.txt
 create mode 100644 Documentation/devicetree/bindings/media/renesas,drif.yaml

-- 
2.25.1

[PATCH v4 1/5] MAINTAINERS: Update MAINTAINERS for Renesas DRIF driver

[Fabrizio Castro]

Add Fabrizio castro and remove Ramesh Shanmugasundaram.

Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Ramesh Shanmugasundaram <rashanmu@gmail.com>
---
v3->v4:
* No change
v2->v3:
* Removed Ramesh Shanmugasundaram as maintainer, as suggested
  by Ramesh
* Reworked commit title and changelog
v1->v2:
* No change

 MAINTAINERS | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index 9a54806ebf02..4ff8e65df4e7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10835,7 +10835,7 @@ F:	drivers/media/platform/renesas-ceu.c
 F:	include/media/drv-intf/renesas-ceu.h
 
 MEDIA DRIVERS FOR RENESAS - DRIF
-M:	Ramesh Shanmugasundaram <rashanmu@gmail.com>
+M:	Fabrizio Castro <fabrizio.castro.jz@renesas.com>
 L:	linux-media@vger.kernel.org
 L:	linux-renesas-soc@vger.kernel.org
 S:	Supported
-- 
2.25.1

[PATCH v4 2/5] media: dt-bindings: media: renesas,drif: Convert to json-schema

[Fabrizio Castro]

Convert the Renesas DRIF bindings to DT schema and update
MAINTAINERS accordingly.

Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
v3->v4:
* Replace "if" statement with "else" statement for the branch
  rejecting pinctrl-0 and pinctrl-names properties, as suggested
  by Geert
v2->v3:
* Removed the definition of pinctrl-0 and pinctrl-names, as
  suggested by Geert
* Added "power-domains" to the list of required properties,
  as suggested by Geert
v1->v2:
* s/controller/Controller/ in the title of renesas,drif.yaml
  as suggested by Laurent.

 .../bindings/media/renesas,drif.txt           | 177 -----------
 .../bindings/media/renesas,drif.yaml          | 277 ++++++++++++++++++
 MAINTAINERS                                   |   2 +-
 3 files changed, 278 insertions(+), 178 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/media/renesas,drif.txt
 create mode 100644 Documentation/devicetree/bindings/media/renesas,drif.yaml

diff --git a/Documentation/devicetree/bindings/media/renesas,drif.txt b/Documentation/devicetree/bindings/media/renesas,drif.txt
deleted file mode 100644
index 0d8974aa8b38..000000000000
--- a/Documentation/devicetree/bindings/media/renesas,drif.txt
+++ /dev/null
@@ -1,177 +0,0 @@
-Renesas R-Car Gen3 Digital Radio Interface controller (DRIF)
-------------------------------------------------------------
-
-R-Car Gen3 DRIF is a SPI like receive only slave device. A general
-representation of DRIF interfacing with a master device is shown below.
-
-+---------------------+                +---------------------+
-|                     |-----SCK------->|CLK                  |
-|       Master        |-----SS-------->|SYNC  DRIFn (slave)  |
-|                     |-----SD0------->|D0                   |
-|                     |-----SD1------->|D1                   |
-+---------------------+                +---------------------+
-
-As per datasheet, each DRIF channel (drifn) is made up of two internal
-channels (drifn0 & drifn1). These two internal channels share the common
-CLK & SYNC. Each internal channel has its own dedicated resources like
-irq, dma channels, address space & clock. This internal split is not
-visible to the external master device.
-
-The device tree model represents each internal channel as a separate node.
-The internal channels sharing the CLK & SYNC are tied together by their
-phandles using a property called "renesas,bonding". For the rest of
-the documentation, unless explicitly stated, the word channel implies an
-internal channel.
-
-When both internal channels are enabled they need to be managed together
-as one (i.e.) they cannot operate alone as independent devices. Out of the
-two, one of them needs to act as a primary device that accepts common
-properties of both the internal channels. This channel is identified by a
-property called "renesas,primary-bond".
-
-To summarize,
-   - When both the internal channels that are bonded together are enabled,
-     the zeroth channel is selected as primary-bond. This channels accepts
-     properties common to all the members of the bond.
-   - When only one of the bonded channels need to be enabled, the property
-     "renesas,bonding" or "renesas,primary-bond" will have no effect. That
-     enabled channel can act alone as any other independent device.
-
-Required properties of an internal channel:
--------------------------------------------
-- compatible:	"renesas,r8a7795-drif" if DRIF controller is a part of R8A7795 SoC.
-		"renesas,r8a7796-drif" if DRIF controller is a part of R8A7796 SoC.
-		"renesas,rcar-gen3-drif" for a generic R-Car Gen3 compatible device.
-
-		When compatible with the generic version, nodes must list the
-		SoC-specific version corresponding to the platform first
-		followed by the generic version.
-
-- reg: offset and length of that channel.
-- interrupts: associated with that channel.
-- clocks: phandle and clock specifier of that channel.
-- clock-names: clock input name string: "fck".
-- dmas: phandles to the DMA channels.
-- dma-names: names of the DMA channel: "rx".
-- renesas,bonding: phandle to the other channel.
-
-Optional properties of an internal channel:
--------------------------------------------
-- power-domains: phandle to the respective power domain.
-
-Required properties of an internal channel when:
-	- It is the only enabled channel of the bond (or)
-	- If it acts as primary among enabled bonds
---------------------------------------------------------
-- pinctrl-0: pin control group to be used for this channel.
-- pinctrl-names: must be "default".
-- renesas,primary-bond: empty property indicating the channel acts as primary
-			among the bonded channels.
-- port: child port node corresponding to the data input, in accordance with
-	the video interface bindings defined in
-	Documentation/devicetree/bindings/media/video-interfaces.txt. The port
-	node must contain at least one endpoint.
-
-Optional endpoint property:
----------------------------
-- sync-active: Indicates sync signal polarity, 0/1 for low/high respectively.
-	       This property maps to SYNCAC bit in the hardware manual. The
-	       default is 1 (active high).
-
-Example:
---------
-
-(1) Both internal channels enabled:
------------------------------------
-
-When interfacing with a third party tuner device with two data pins as shown
-below.
-
-+---------------------+                +---------------------+
-|                     |-----SCK------->|CLK                  |
-|       Master        |-----SS-------->|SYNC  DRIFn (slave)  |
-|                     |-----SD0------->|D0                   |
-|                     |-----SD1------->|D1                   |
-+---------------------+                +---------------------+
-
-	drif00: rif@e6f40000 {
-		compatible = "renesas,r8a7795-drif",
-			     "renesas,rcar-gen3-drif";
-		reg = <0 0xe6f40000 0 0x64>;
-		interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&cpg CPG_MOD 515>;
-		clock-names = "fck";
-		dmas = <&dmac1 0x20>, <&dmac2 0x20>;
-		dma-names = "rx", "rx";
-		power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
-		renesas,bonding = <&drif01>;
-		renesas,primary-bond;
-		pinctrl-0 = <&drif0_pins>;
-		pinctrl-names = "default";
-		port {
-			drif0_ep: endpoint {
-			     remote-endpoint = <&tuner_ep>;
-			};
-		};
-	};
-
-	drif01: rif@e6f50000 {
-		compatible = "renesas,r8a7795-drif",
-			     "renesas,rcar-gen3-drif";
-		reg = <0 0xe6f50000 0 0x64>;
-		interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&cpg CPG_MOD 514>;
-		clock-names = "fck";
-		dmas = <&dmac1 0x22>, <&dmac2 0x22>;
-		dma-names = "rx", "rx";
-		power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
-		renesas,bonding = <&drif00>;
-	};
-
-
-(2) Internal channel 1 alone is enabled:
-----------------------------------------
-
-When interfacing with a third party tuner device with one data pin as shown
-below.
-
-+---------------------+                +---------------------+
-|                     |-----SCK------->|CLK                  |
-|       Master        |-----SS-------->|SYNC  DRIFn (slave)  |
-|                     |                |D0 (unused)          |
-|                     |-----SD-------->|D1                   |
-+---------------------+                +---------------------+
-
-	drif00: rif@e6f40000 {
-		compatible = "renesas,r8a7795-drif",
-			     "renesas,rcar-gen3-drif";
-		reg = <0 0xe6f40000 0 0x64>;
-		interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&cpg CPG_MOD 515>;
-		clock-names = "fck";
-		dmas = <&dmac1 0x20>, <&dmac2 0x20>;
-		dma-names = "rx", "rx";
-		power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
-		renesas,bonding = <&drif01>;
-	};
-
-	drif01: rif@e6f50000 {
-		compatible = "renesas,r8a7795-drif",
-			     "renesas,rcar-gen3-drif";
-		reg = <0 0xe6f50000 0 0x64>;
-		interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&cpg CPG_MOD 514>;
-		clock-names = "fck";
-		dmas = <&dmac1 0x22>, <&dmac2 0x22>;
-		dma-names = "rx", "rx";
-		power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
-		renesas,bonding = <&drif00>;
-		pinctrl-0 = <&drif0_pins>;
-		pinctrl-names = "default";
-		port {
-			drif0_ep: endpoint {
-			     remote-endpoint = <&tuner_ep>;
-			     sync-active = <0>;
-			};
-		};
-	};
diff --git a/Documentation/devicetree/bindings/media/renesas,drif.yaml b/Documentation/devicetree/bindings/media/renesas,drif.yaml
new file mode 100644
index 000000000000..3832ce837553
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/renesas,drif.yaml
@@ -0,0 +1,277 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/renesas,drif.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas R-Car Gen3 Digital Radio Interface Controller (DRIF)
+
+maintainers:
+  - Ramesh Shanmugasundaram <rashanmu@gmail.com>
+  - Fabrizio Castro <fabrizio.castro.jz@renesas.com>
+
+description: |
+  R-Car Gen3 DRIF is a SPI like receive only slave device. A general
+  representation of DRIF interfacing with a master device is shown below.
+
+  +---------------------+                +---------------------+
+  |                     |-----SCK------->|CLK                  |
+  |       Master        |-----SS-------->|SYNC  DRIFn (slave)  |
+  |                     |-----SD0------->|D0                   |
+  |                     |-----SD1------->|D1                   |
+  +---------------------+                +---------------------+
+
+  As per datasheet, each DRIF channel (drifn) is made up of two internal
+  channels (drifn0 & drifn1). These two internal channels share the common
+  CLK & SYNC. Each internal channel has its own dedicated resources like
+  irq, dma channels, address space & clock. This internal split is not
+  visible to the external master device.
+
+  The device tree model represents each internal channel as a separate node.
+  The internal channels sharing the CLK & SYNC are tied together by their
+  phandles using a property called "renesas,bonding". For the rest of
+  the documentation, unless explicitly stated, the word channel implies an
+  internal channel.
+
+  When both internal channels are enabled they need to be managed together
+  as one (i.e.) they cannot operate alone as independent devices. Out of the
+  two, one of them needs to act as a primary device that accepts common
+  properties of both the internal channels. This channel is identified by a
+  property called "renesas,primary-bond".
+
+  To summarize,
+     * When both the internal channels that are bonded together are enabled,
+       the zeroth channel is selected as primary-bond. This channels accepts
+       properties common to all the members of the bond.
+     * When only one of the bonded channels need to be enabled, the property
+       "renesas,bonding" or "renesas,primary-bond" will have no effect. That
+       enabled channel can act alone as any other independent device.
+
+properties:
+  compatible:
+    items:
+      - enum:
+        - renesas,r8a7795-drif        # R-Car H3
+        - renesas,r8a7796-drif        # R-Car M3-W
+      - const: renesas,rcar-gen3-drif # Generic R-Car Gen3 compatible device
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    maxItems: 1
+    items:
+      - const: fck
+
+  resets:
+    maxItems: 1
+
+  dmas:
+    minItems: 1
+    maxItems: 2
+
+  dma-names:
+    minItems: 1
+    maxItems: 2
+    items:
+      - const: rx
+      - const: rx
+
+  renesas,bonding:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      The phandle to the other internal channel of DRIF
+
+  power-domains:
+    maxItems: 1
+
+  renesas,primary-bond:
+    type: boolean
+    description:
+      Indicates that the channel acts as primary among the bonded channels.
+
+  port:
+    type: object
+    description:
+      Child port node corresponding to the data input, in accordance with the
+      video interface bindings defined in
+      Documentation/devicetree/bindings/media/video-interfaces.txt.
+      The port node must contain at least one endpoint.
+
+    properties:
+      endpoint:
+        type: object
+
+        properties:
+          remote-endpoint:
+            description:
+              A phandle to the remote tuner endpoint subnode in remote node
+              port.
+
+          sync-active:
+            enum: [0, 1]
+            description:
+              Indicates sync signal polarity, 0/1 for low/high respectively.
+              This property maps to SYNCAC bit in the hardware manual. The
+              default is 1 (active high).
+
+        additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - resets
+  - dmas
+  - dma-names
+  - renesas,bonding
+  - power-domains
+
+allOf:
+  - if:
+      required:
+        - renesas,primary-bond
+    then:
+      required:
+        - pinctrl-0
+        - pinctrl-names
+        - port
+
+  - if:
+      required:
+        - port
+    then:
+      required:
+        - pinctrl-0
+        - pinctrl-names
+    else:
+      properties:
+        pinctrl-0: false
+        pinctrl-names: false
+
+additionalProperties: false
+
+examples:
+  # Example with both internal channels enabled.
+  #
+  # When interfacing with a third party tuner device with two data pins as shown
+  # below.
+  #
+  # +---------------------+                +---------------------+
+  # |                     |-----SCK------->|CLK                  |
+  # |       Master        |-----SS-------->|SYNC  DRIFn (slave)  |
+  # |                     |-----SD0------->|D0                   |
+  # |                     |-----SD1------->|D1                   |
+  # +---------------------+                +---------------------+
+  - |
+    #include <dt-bindings/clock/r8a7795-cpg-mssr.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/power/r8a7795-sysc.h>
+
+    soc {
+            #address-cells = <2>;
+            #size-cells = <2>;
+
+            drif00: rif@e6f40000 {
+                    compatible = "renesas,r8a7795-drif",
+                                 "renesas,rcar-gen3-drif";
+                    reg = <0 0xe6f40000 0 0x64>;
+                    interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
+                    clocks = <&cpg CPG_MOD 515>;
+                    clock-names = "fck";
+                    dmas = <&dmac1 0x20>, <&dmac2 0x20>;
+                    dma-names = "rx", "rx";
+                    power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
+                    renesas,bonding = <&drif01>;
+                    resets = <&cpg 515>;
+                    renesas,primary-bond;
+                    pinctrl-0 = <&drif0_pins>;
+                    pinctrl-names = "default";
+                    port {
+                            drif0_ep: endpoint {
+                                 remote-endpoint = <&tuner_ep>;
+                            };
+                    };
+            };
+
+            drif01: rif@e6f50000 {
+                    compatible = "renesas,r8a7795-drif",
+                                 "renesas,rcar-gen3-drif";
+                    reg = <0 0xe6f50000 0 0x64>;
+                    interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>;
+                    clocks = <&cpg CPG_MOD 514>;
+                    clock-names = "fck";
+                    dmas = <&dmac1 0x22>, <&dmac2 0x22>;
+                    dma-names = "rx", "rx";
+                    power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
+                    renesas,bonding = <&drif00>;
+                    resets = <&cpg 514>;
+            };
+    };
+
+  # Example with internal channel 1 alone enabled.
+  #
+  # When interfacing with a third party tuner device with one data pin as shown
+  # below.
+  #
+  # +---------------------+                +---------------------+
+  # |                     |-----SCK------->|CLK                  |
+  # |       Master        |-----SS-------->|SYNC  DRIFn (slave)  |
+  # |                     |                |D0 (unused)          |
+  # |                     |-----SD-------->|D1                   |
+  # +---------------------+                +---------------------+
+  - |
+    #include <dt-bindings/clock/r8a7795-cpg-mssr.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/power/r8a7795-sysc.h>
+
+    soc {
+            #address-cells = <2>;
+            #size-cells = <2>;
+
+            drif10: rif@e6f60000 {
+                    compatible = "renesas,r8a7795-drif",
+                                 "renesas,rcar-gen3-drif";
+                    reg = <0 0xe6f60000 0 0x64>;
+                    interrupts = <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>;
+                    clocks = <&cpg CPG_MOD 513>;
+                    clock-names = "fck";
+                    dmas = <&dmac1 0x24>, <&dmac2 0x24>;
+                    dma-names = "rx", "rx";
+                    power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
+                    resets = <&cpg 513>;
+                    renesas,bonding = <&drif11>;
+                    status = "disabled";
+            };
+
+            drif11: rif@e6f70000 {
+                    compatible = "renesas,r8a7795-drif",
+                                 "renesas,rcar-gen3-drif";
+                    reg = <0 0xe6f70000 0 0x64>;
+                    interrupts = <GIC_SPI 15 IRQ_TYPE_LEVEL_HIGH>;
+                    clocks = <&cpg CPG_MOD 512>;
+                    clock-names = "fck";
+                    dmas = <&dmac1 0x26>, <&dmac2 0x26>;
+                    dma-names = "rx", "rx";
+                    power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
+                    resets = <&cpg 512>;
+                    renesas,bonding = <&drif10>;
+                    pinctrl-0 = <&drif1_pins>;
+                    pinctrl-names = "default";
+                    port {
+                            drif1_ep: endpoint {
+                                 remote-endpoint = <&tuner_ep1>;
+                                 sync-active = <0>;
+                            };
+                    };
+            };
+    };
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 4ff8e65df4e7..797718391b38 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10840,7 +10840,7 @@ L:	linux-media@vger.kernel.org
 L:	linux-renesas-soc@vger.kernel.org
 S:	Supported
 T:	git git://linuxtv.org/media_tree.git
-F:	Documentation/devicetree/bindings/media/renesas,drif.txt
+F:	Documentation/devicetree/bindings/media/renesas,drif.yaml
 F:	drivers/media/platform/rcar_drif.c
 
 MEDIA DRIVERS FOR RENESAS - FCP
-- 
2.25.1

[PATCH v4 3/5] media: dt-bindings: media: renesas,drif: Add r8a77990 support

[Fabrizio Castro]

The r8a77990 (a.k.a. R-Car E3) device tree schema is
compatible with R-Car H3 and M3-W schema.

Document r8a77990 support within renesas,drif.yaml.

Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
v3->v4:
* No change
v2->v3:
* No change
v1->v2:
* No change

 Documentation/devicetree/bindings/media/renesas,drif.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/media/renesas,drif.yaml b/Documentation/devicetree/bindings/media/renesas,drif.yaml
index 3832ce837553..478968345aa9 100644
--- a/Documentation/devicetree/bindings/media/renesas,drif.yaml
+++ b/Documentation/devicetree/bindings/media/renesas,drif.yaml
@@ -53,6 +53,7 @@ properties:
       - enum:
         - renesas,r8a7795-drif        # R-Car H3
         - renesas,r8a7796-drif        # R-Car M3-W
+        - renesas,r8a77990-drif       # R-Car E3
       - const: renesas,rcar-gen3-drif # Generic R-Car Gen3 compatible device
 
   reg:
-- 
2.25.1

[PATCH v4 4/5] media: dt-bindings: media: renesas,drif: Add r8a77965 support

[Fabrizio Castro]

The r8a77965 (a.k.a. R-Car M3-N) device tree schema is
compatible with the already documented R-Car Gen3 devices.

Document r8a77965 support within renesas,drif.yaml.

Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
v3->v4:
* No change
v2->v3:
* New patch

 Documentation/devicetree/bindings/media/renesas,drif.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/media/renesas,drif.yaml b/Documentation/devicetree/bindings/media/renesas,drif.yaml
index 478968345aa9..0fe79f9e8eb9 100644
--- a/Documentation/devicetree/bindings/media/renesas,drif.yaml
+++ b/Documentation/devicetree/bindings/media/renesas,drif.yaml
@@ -53,6 +53,7 @@ properties:
       - enum:
         - renesas,r8a7795-drif        # R-Car H3
         - renesas,r8a7796-drif        # R-Car M3-W
+        - renesas,r8a77965-drif       # R-Car M3-N
         - renesas,r8a77990-drif       # R-Car E3
       - const: renesas,rcar-gen3-drif # Generic R-Car Gen3 compatible device
 
-- 
2.25.1

[PATCH v4 5/5] arm64: dts: r8a77965: Add DRIF support

[Fabrizio Castro]

Add the DRIF controller nodes for r8a77965 (a.k.a. R-Car M3-N).

Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
v3->v4:
* No change
v2->v3:
* New patch

 arch/arm64/boot/dts/renesas/r8a77965.dtsi | 120 ++++++++++++++++++++++
 1 file changed, 120 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r8a77965.dtsi b/arch/arm64/boot/dts/renesas/r8a77965.dtsi
index fe4dc12e2bdf..c5a54dc7ede2 100644
--- a/arch/arm64/boot/dts/renesas/r8a77965.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a77965.dtsi
@@ -1550,6 +1550,126 @@ vin7csi40: endpoint@2 {
 			};
 		};
 
+		drif00: rif@e6f40000 {
+			compatible = "renesas,r8a77965-drif",
+				     "renesas,rcar-gen3-drif";
+			reg = <0 0xe6f40000 0 0x84>;
+			interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 515>;
+			clock-names = "fck";
+			dmas = <&dmac1 0x20>, <&dmac2 0x20>;
+			dma-names = "rx", "rx";
+			power-domains = <&sysc R8A77965_PD_ALWAYS_ON>;
+			resets = <&cpg 515>;
+			renesas,bonding = <&drif01>;
+			status = "disabled";
+		};
+
+		drif01: rif@e6f50000 {
+			compatible = "renesas,r8a77965-drif",
+				     "renesas,rcar-gen3-drif";
+			reg = <0 0xe6f50000 0 0x84>;
+			interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 514>;
+			clock-names = "fck";
+			dmas = <&dmac1 0x22>, <&dmac2 0x22>;
+			dma-names = "rx", "rx";
+			power-domains = <&sysc R8A77965_PD_ALWAYS_ON>;
+			resets = <&cpg 514>;
+			renesas,bonding = <&drif00>;
+			status = "disabled";
+		};
+
+		drif10: rif@e6f60000 {
+			compatible = "renesas,r8a77965-drif",
+				     "renesas,rcar-gen3-drif";
+			reg = <0 0xe6f60000 0 0x84>;
+			interrupts = <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 513>;
+			clock-names = "fck";
+			dmas = <&dmac1 0x24>, <&dmac2 0x24>;
+			dma-names = "rx", "rx";
+			power-domains = <&sysc R8A77965_PD_ALWAYS_ON>;
+			resets = <&cpg 513>;
+			renesas,bonding = <&drif11>;
+			status = "disabled";
+		};
+
+		drif11: rif@e6f70000 {
+			compatible = "renesas,r8a77965-drif",
+				     "renesas,rcar-gen3-drif";
+			reg = <0 0xe6f70000 0 0x84>;
+			interrupts = <GIC_SPI 15 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 512>;
+			clock-names = "fck";
+			dmas = <&dmac1 0x26>, <&dmac2 0x26>;
+			dma-names = "rx", "rx";
+			power-domains = <&sysc R8A77965_PD_ALWAYS_ON>;
+			resets = <&cpg 512>;
+			renesas,bonding = <&drif10>;
+			status = "disabled";
+		};
+
+		drif20: rif@e6f80000 {
+			compatible = "renesas,r8a77965-drif",
+				     "renesas,rcar-gen3-drif";
+			reg = <0 0xe6f80000 0 0x84>;
+			interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 511>;
+			clock-names = "fck";
+			dmas = <&dmac1 0x28>, <&dmac2 0x28>;
+			dma-names = "rx", "rx";
+			power-domains = <&sysc R8A77965_PD_ALWAYS_ON>;
+			resets = <&cpg 511>;
+			renesas,bonding = <&drif21>;
+			status = "disabled";
+		};
+
+		drif21: rif@e6f90000 {
+			compatible = "renesas,r8a77965-drif",
+				     "renesas,rcar-gen3-drif";
+			reg = <0 0xe6f90000 0 0x84>;
+			interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 510>;
+			clock-names = "fck";
+			dmas = <&dmac1 0x2a>, <&dmac2 0x2a>;
+			dma-names = "rx", "rx";
+			power-domains = <&sysc R8A77965_PD_ALWAYS_ON>;
+			resets = <&cpg 510>;
+			renesas,bonding = <&drif20>;
+			status = "disabled";
+		};
+
+		drif30: rif@e6fa0000 {
+			compatible = "renesas,r8a77965-drif",
+				     "renesas,rcar-gen3-drif";
+			reg = <0 0xe6fa0000 0 0x84>;
+			interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 509>;
+			clock-names = "fck";
+			dmas = <&dmac1 0x2c>, <&dmac2 0x2c>;
+			dma-names = "rx", "rx";
+			power-domains = <&sysc R8A77965_PD_ALWAYS_ON>;
+			resets = <&cpg 509>;
+			renesas,bonding = <&drif31>;
+			status = "disabled";
+		};
+
+		drif31: rif@e6fb0000 {
+			compatible = "renesas,r8a77965-drif",
+				     "renesas,rcar-gen3-drif";
+			reg = <0 0xe6fb0000 0 0x84>;
+			interrupts = <GIC_SPI 27 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&cpg CPG_MOD 508>;
+			clock-names = "fck";
+			dmas = <&dmac1 0x2e>, <&dmac2 0x2e>;
+			dma-names = "rx", "rx";
+			power-domains = <&sysc R8A77965_PD_ALWAYS_ON>;
+			resets = <&cpg 508>;
+			renesas,bonding = <&drif30>;
+			status = "disabled";
+		};
+
 		rcar_sound: sound@ec500000 {
 			/*
 			 * #sound-dai-cells is required
-- 
2.25.1

Re: [PATCH v4 2/5] media: dt-bindings: media: renesas,drif: Convert to json-schema

[Rob Herring]

On Wed, 14 Oct 2020 16:57:16 +0100, Fabrizio Castro wrote:
> Convert the Renesas DRIF bindings to DT schema and update
> MAINTAINERS accordingly.
> 
> Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> ---
> v3->v4:
> * Replace "if" statement with "else" statement for the branch
>   rejecting pinctrl-0 and pinctrl-names properties, as suggested
>   by Geert
> v2->v3:
> * Removed the definition of pinctrl-0 and pinctrl-names, as
>   suggested by Geert
> * Added "power-domains" to the list of required properties,
>   as suggested by Geert
> v1->v2:
> * s/controller/Controller/ in the title of renesas,drif.yaml
>   as suggested by Laurent.
> 
>  .../bindings/media/renesas,drif.txt           | 177 -----------
>  .../bindings/media/renesas,drif.yaml          | 277 ++++++++++++++++++
>  MAINTAINERS                                   |   2 +-
>  3 files changed, 278 insertions(+), 178 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/media/renesas,drif.txt
>  create mode 100644 Documentation/devicetree/bindings/media/renesas,drif.yaml
> 


My bot found errors running 'make dt_binding_check' on your patch:

./Documentation/devicetree/bindings/media/renesas,drif.yaml:54:9: [warning] wrong indentation: expected 10 but found 8 (indentation)


See https://patchwork.ozlabs.org/patch/1382223

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure dt-schema is up to date:

pip3 install git+https://github.com/devicetree-org/dt-schema.git@master --upgrade

Please check and re-submit.

Re: [PATCH v4 2/5] media: dt-bindings: media: renesas,drif: Convert to json-schema

[Rob Herring]

On Wed, Oct 14, 2020 at 04:57:16PM +0100, Fabrizio Castro wrote:
> Convert the Renesas DRIF bindings to DT schema and update
> MAINTAINERS accordingly.
> 
> Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> ---
> v3->v4:
> * Replace "if" statement with "else" statement for the branch
>   rejecting pinctrl-0 and pinctrl-names properties, as suggested
>   by Geert
> v2->v3:
> * Removed the definition of pinctrl-0 and pinctrl-names, as
>   suggested by Geert
> * Added "power-domains" to the list of required properties,
>   as suggested by Geert
> v1->v2:
> * s/controller/Controller/ in the title of renesas,drif.yaml
>   as suggested by Laurent.
> 
>  .../bindings/media/renesas,drif.txt           | 177 -----------
>  .../bindings/media/renesas,drif.yaml          | 277 ++++++++++++++++++
>  MAINTAINERS                                   |   2 +-
>  3 files changed, 278 insertions(+), 178 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/media/renesas,drif.txt
>  create mode 100644 Documentation/devicetree/bindings/media/renesas,drif.yaml
> 
> diff --git a/Documentation/devicetree/bindings/media/renesas,drif.txt b/Documentation/devicetree/bindings/media/renesas,drif.txt
> deleted file mode 100644
> index 0d8974aa8b38..000000000000
> --- a/Documentation/devicetree/bindings/media/renesas,drif.txt
> +++ /dev/null
> @@ -1,177 +0,0 @@
> -Renesas R-Car Gen3 Digital Radio Interface controller (DRIF)
> -------------------------------------------------------------
> -
> -R-Car Gen3 DRIF is a SPI like receive only slave device. A general
> -representation of DRIF interfacing with a master device is shown below.
> -
> -+---------------------+                +---------------------+
> -|                     |-----SCK------->|CLK                  |
> -|       Master        |-----SS-------->|SYNC  DRIFn (slave)  |
> -|                     |-----SD0------->|D0                   |
> -|                     |-----SD1------->|D1                   |
> -+---------------------+                +---------------------+
> -
> -As per datasheet, each DRIF channel (drifn) is made up of two internal
> -channels (drifn0 & drifn1). These two internal channels share the common
> -CLK & SYNC. Each internal channel has its own dedicated resources like
> -irq, dma channels, address space & clock. This internal split is not
> -visible to the external master device.
> -
> -The device tree model represents each internal channel as a separate node.
> -The internal channels sharing the CLK & SYNC are tied together by their
> -phandles using a property called "renesas,bonding". For the rest of
> -the documentation, unless explicitly stated, the word channel implies an
> -internal channel.
> -
> -When both internal channels are enabled they need to be managed together
> -as one (i.e.) they cannot operate alone as independent devices. Out of the
> -two, one of them needs to act as a primary device that accepts common
> -properties of both the internal channels. This channel is identified by a
> -property called "renesas,primary-bond".
> -
> -To summarize,
> -   - When both the internal channels that are bonded together are enabled,
> -     the zeroth channel is selected as primary-bond. This channels accepts
> -     properties common to all the members of the bond.
> -   - When only one of the bonded channels need to be enabled, the property
> -     "renesas,bonding" or "renesas,primary-bond" will have no effect. That
> -     enabled channel can act alone as any other independent device.
> -
> -Required properties of an internal channel:
> --------------------------------------------
> -- compatible:	"renesas,r8a7795-drif" if DRIF controller is a part of R8A7795 SoC.
> -		"renesas,r8a7796-drif" if DRIF controller is a part of R8A7796 SoC.
> -		"renesas,rcar-gen3-drif" for a generic R-Car Gen3 compatible device.
> -
> -		When compatible with the generic version, nodes must list the
> -		SoC-specific version corresponding to the platform first
> -		followed by the generic version.
> -
> -- reg: offset and length of that channel.
> -- interrupts: associated with that channel.
> -- clocks: phandle and clock specifier of that channel.
> -- clock-names: clock input name string: "fck".
> -- dmas: phandles to the DMA channels.
> -- dma-names: names of the DMA channel: "rx".
> -- renesas,bonding: phandle to the other channel.
> -
> -Optional properties of an internal channel:
> --------------------------------------------
> -- power-domains: phandle to the respective power domain.
> -
> -Required properties of an internal channel when:
> -	- It is the only enabled channel of the bond (or)
> -	- If it acts as primary among enabled bonds
> ---------------------------------------------------------
> -- pinctrl-0: pin control group to be used for this channel.
> -- pinctrl-names: must be "default".
> -- renesas,primary-bond: empty property indicating the channel acts as primary
> -			among the bonded channels.
> -- port: child port node corresponding to the data input, in accordance with
> -	the video interface bindings defined in
> -	Documentation/devicetree/bindings/media/video-interfaces.txt. The port
> -	node must contain at least one endpoint.
> -
> -Optional endpoint property:
> ----------------------------
> -- sync-active: Indicates sync signal polarity, 0/1 for low/high respectively.
> -	       This property maps to SYNCAC bit in the hardware manual. The
> -	       default is 1 (active high).
> -
> -Example:
> ---------
> -
> -(1) Both internal channels enabled:
> ------------------------------------
> -
> -When interfacing with a third party tuner device with two data pins as shown
> -below.
> -
> -+---------------------+                +---------------------+
> -|                     |-----SCK------->|CLK                  |
> -|       Master        |-----SS-------->|SYNC  DRIFn (slave)  |
> -|                     |-----SD0------->|D0                   |
> -|                     |-----SD1------->|D1                   |
> -+---------------------+                +---------------------+
> -
> -	drif00: rif@e6f40000 {
> -		compatible = "renesas,r8a7795-drif",
> -			     "renesas,rcar-gen3-drif";
> -		reg = <0 0xe6f40000 0 0x64>;
> -		interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
> -		clocks = <&cpg CPG_MOD 515>;
> -		clock-names = "fck";
> -		dmas = <&dmac1 0x20>, <&dmac2 0x20>;
> -		dma-names = "rx", "rx";
> -		power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
> -		renesas,bonding = <&drif01>;
> -		renesas,primary-bond;
> -		pinctrl-0 = <&drif0_pins>;
> -		pinctrl-names = "default";
> -		port {
> -			drif0_ep: endpoint {
> -			     remote-endpoint = <&tuner_ep>;
> -			};
> -		};
> -	};
> -
> -	drif01: rif@e6f50000 {
> -		compatible = "renesas,r8a7795-drif",
> -			     "renesas,rcar-gen3-drif";
> -		reg = <0 0xe6f50000 0 0x64>;
> -		interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>;
> -		clocks = <&cpg CPG_MOD 514>;
> -		clock-names = "fck";
> -		dmas = <&dmac1 0x22>, <&dmac2 0x22>;
> -		dma-names = "rx", "rx";
> -		power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
> -		renesas,bonding = <&drif00>;
> -	};
> -
> -
> -(2) Internal channel 1 alone is enabled:
> -----------------------------------------
> -
> -When interfacing with a third party tuner device with one data pin as shown
> -below.
> -
> -+---------------------+                +---------------------+
> -|                     |-----SCK------->|CLK                  |
> -|       Master        |-----SS-------->|SYNC  DRIFn (slave)  |
> -|                     |                |D0 (unused)          |
> -|                     |-----SD-------->|D1                   |
> -+---------------------+                +---------------------+
> -
> -	drif00: rif@e6f40000 {
> -		compatible = "renesas,r8a7795-drif",
> -			     "renesas,rcar-gen3-drif";
> -		reg = <0 0xe6f40000 0 0x64>;
> -		interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
> -		clocks = <&cpg CPG_MOD 515>;
> -		clock-names = "fck";
> -		dmas = <&dmac1 0x20>, <&dmac2 0x20>;
> -		dma-names = "rx", "rx";
> -		power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
> -		renesas,bonding = <&drif01>;
> -	};
> -
> -	drif01: rif@e6f50000 {
> -		compatible = "renesas,r8a7795-drif",
> -			     "renesas,rcar-gen3-drif";
> -		reg = <0 0xe6f50000 0 0x64>;
> -		interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>;
> -		clocks = <&cpg CPG_MOD 514>;
> -		clock-names = "fck";
> -		dmas = <&dmac1 0x22>, <&dmac2 0x22>;
> -		dma-names = "rx", "rx";
> -		power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
> -		renesas,bonding = <&drif00>;
> -		pinctrl-0 = <&drif0_pins>;
> -		pinctrl-names = "default";
> -		port {
> -			drif0_ep: endpoint {
> -			     remote-endpoint = <&tuner_ep>;
> -			     sync-active = <0>;
> -			};
> -		};
> -	};
> diff --git a/Documentation/devicetree/bindings/media/renesas,drif.yaml b/Documentation/devicetree/bindings/media/renesas,drif.yaml
> new file mode 100644
> index 000000000000..3832ce837553
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/media/renesas,drif.yaml
> @@ -0,0 +1,277 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/media/renesas,drif.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Renesas R-Car Gen3 Digital Radio Interface Controller (DRIF)
> +
> +maintainers:
> +  - Ramesh Shanmugasundaram <rashanmu@gmail.com>
> +  - Fabrizio Castro <fabrizio.castro.jz@renesas.com>
> +
> +description: |
> +  R-Car Gen3 DRIF is a SPI like receive only slave device. A general
> +  representation of DRIF interfacing with a master device is shown below.
> +
> +  +---------------------+                +---------------------+
> +  |                     |-----SCK------->|CLK                  |
> +  |       Master        |-----SS-------->|SYNC  DRIFn (slave)  |
> +  |                     |-----SD0------->|D0                   |
> +  |                     |-----SD1------->|D1                   |
> +  +---------------------+                +---------------------+
> +
> +  As per datasheet, each DRIF channel (drifn) is made up of two internal
> +  channels (drifn0 & drifn1). These two internal channels share the common
> +  CLK & SYNC. Each internal channel has its own dedicated resources like
> +  irq, dma channels, address space & clock. This internal split is not
> +  visible to the external master device.
> +
> +  The device tree model represents each internal channel as a separate node.
> +  The internal channels sharing the CLK & SYNC are tied together by their
> +  phandles using a property called "renesas,bonding". For the rest of
> +  the documentation, unless explicitly stated, the word channel implies an
> +  internal channel.
> +
> +  When both internal channels are enabled they need to be managed together
> +  as one (i.e.) they cannot operate alone as independent devices. Out of the
> +  two, one of them needs to act as a primary device that accepts common
> +  properties of both the internal channels. This channel is identified by a
> +  property called "renesas,primary-bond".
> +
> +  To summarize,
> +     * When both the internal channels that are bonded together are enabled,
> +       the zeroth channel is selected as primary-bond. This channels accepts
> +       properties common to all the members of the bond.
> +     * When only one of the bonded channels need to be enabled, the property
> +       "renesas,bonding" or "renesas,primary-bond" will have no effect. That
> +       enabled channel can act alone as any other independent device.
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +        - renesas,r8a7795-drif        # R-Car H3
> +        - renesas,r8a7796-drif        # R-Car M3-W

Note the bot error is from yamllint which just got added to the checks. 
Need 2 more spaces indent here.

With that,

Reviewed-by: Rob Herring <robh@kernel.org>

Re: [PATCH v4 3/5] media: dt-bindings: media: renesas,drif: Add r8a77990 support

[Rob Herring]

On Wed, 14 Oct 2020 16:57:17 +0100, Fabrizio Castro wrote:
> The r8a77990 (a.k.a. R-Car E3) device tree schema is
> compatible with R-Car H3 and M3-W schema.
> 
> Document r8a77990 support within renesas,drif.yaml.
> 
> Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> ---
> v3->v4:
> * No change
> v2->v3:
> * No change
> v1->v2:
> * No change
> 
>  Documentation/devicetree/bindings/media/renesas,drif.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 

Acked-by: Rob Herring <robh@kernel.org>

Re: [PATCH v4 4/5] media: dt-bindings: media: renesas,drif: Add r8a77965 support

[Rob Herring]

On Wed, 14 Oct 2020 16:57:18 +0100, Fabrizio Castro wrote:
> The r8a77965 (a.k.a. R-Car M3-N) device tree schema is
> compatible with the already documented R-Car Gen3 devices.
> 
> Document r8a77965 support within renesas,drif.yaml.
> 
> Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> ---
> v3->v4:
> * No change
> v2->v3:
> * New patch
> 
>  Documentation/devicetree/bindings/media/renesas,drif.yaml | 1 +
>  1 file changed, 1 insertion(+)
> 

Acked-by: Rob Herring <robh@kernel.org>

RE: [PATCH v4 2/5] media: dt-bindings: media: renesas,drif: Convert to json-schema

[Fabrizio Castro]

Hi Rob,

Thank you for your feedback.

> From: Rob Herring <robh@kernel.org>
> Sent: 16 October 2020 16:56
> Subject: Re: [PATCH v4 2/5] media: dt-bindings: media: renesas,drif: Convert to
> json-schema
> 
> On Wed, Oct 14, 2020 at 04:57:16PM +0100, Fabrizio Castro wrote:
> > Convert the Renesas DRIF bindings to DT schema and update
> > MAINTAINERS accordingly.
> >
> > Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@renesas.com>
> > Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> > Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
> > ---
> > v3->v4:
> > * Replace "if" statement with "else" statement for the branch
> >   rejecting pinctrl-0 and pinctrl-names properties, as suggested
> >   by Geert
> > v2->v3:
> > * Removed the definition of pinctrl-0 and pinctrl-names, as
> >   suggested by Geert
> > * Added "power-domains" to the list of required properties,
> >   as suggested by Geert
> > v1->v2:
> > * s/controller/Controller/ in the title of renesas,drif.yaml
> >   as suggested by Laurent.
> >
> >  .../bindings/media/renesas,drif.txt           | 177 -----------
> >  .../bindings/media/renesas,drif.yaml          | 277 ++++++++++++++++++
> >  MAINTAINERS                                   |   2 +-
> >  3 files changed, 278 insertions(+), 178 deletions(-)
> >  delete mode 100644
> Documentation/devicetree/bindings/media/renesas,drif.txt
> >  create mode 100644
> Documentation/devicetree/bindings/media/renesas,drif.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/media/renesas,drif.txt
> b/Documentation/devicetree/bindings/media/renesas,drif.txt
> > deleted file mode 100644
> > index 0d8974aa8b38..000000000000
> > --- a/Documentation/devicetree/bindings/media/renesas,drif.txt
> > +++ /dev/null
> > @@ -1,177 +0,0 @@
> > -Renesas R-Car Gen3 Digital Radio Interface controller (DRIF)
> > -------------------------------------------------------------
> > -
> > -R-Car Gen3 DRIF is a SPI like receive only slave device. A general
> > -representation of DRIF interfacing with a master device is shown below.
> > -
> > -+---------------------+                +---------------------+
> > -|                     |-----SCK------->|CLK                  |
> > -|       Master        |-----SS-------->|SYNC  DRIFn (slave)  |
> > -|                     |-----SD0------->|D0                   |
> > -|                     |-----SD1------->|D1                   |
> > -+---------------------+                +---------------------+
> > -
> > -As per datasheet, each DRIF channel (drifn) is made up of two internal
> > -channels (drifn0 & drifn1). These two internal channels share the common
> > -CLK & SYNC. Each internal channel has its own dedicated resources like
> > -irq, dma channels, address space & clock. This internal split is not
> > -visible to the external master device.
> > -
> > -The device tree model represents each internal channel as a separate node.
> > -The internal channels sharing the CLK & SYNC are tied together by their
> > -phandles using a property called "renesas,bonding". For the rest of
> > -the documentation, unless explicitly stated, the word channel implies an
> > -internal channel.
> > -
> > -When both internal channels are enabled they need to be managed together
> > -as one (i.e.) they cannot operate alone as independent devices. Out of the
> > -two, one of them needs to act as a primary device that accepts common
> > -properties of both the internal channels. This channel is identified by a
> > -property called "renesas,primary-bond".
> > -
> > -To summarize,
> > -   - When both the internal channels that are bonded together are enabled,
> > -     the zeroth channel is selected as primary-bond. This channels accepts
> > -     properties common to all the members of the bond.
> > -   - When only one of the bonded channels need to be enabled, the property
> > -     "renesas,bonding" or "renesas,primary-bond" will have no effect. That
> > -     enabled channel can act alone as any other independent device.
> > -
> > -Required properties of an internal channel:
> > --------------------------------------------
> > -- compatible:	"renesas,r8a7795-drif" if DRIF controller is a part of R8A7795
> SoC.
> > -		"renesas,r8a7796-drif" if DRIF controller is a part of R8A7796
> SoC.
> > -		"renesas,rcar-gen3-drif" for a generic R-Car Gen3 compatible
> device.
> > -
> > -		When compatible with the generic version, nodes must list the
> > -		SoC-specific version corresponding to the platform first
> > -		followed by the generic version.
> > -
> > -- reg: offset and length of that channel.
> > -- interrupts: associated with that channel.
> > -- clocks: phandle and clock specifier of that channel.
> > -- clock-names: clock input name string: "fck".
> > -- dmas: phandles to the DMA channels.
> > -- dma-names: names of the DMA channel: "rx".
> > -- renesas,bonding: phandle to the other channel.
> > -
> > -Optional properties of an internal channel:
> > --------------------------------------------
> > -- power-domains: phandle to the respective power domain.
> > -
> > -Required properties of an internal channel when:
> > -	- It is the only enabled channel of the bond (or)
> > -	- If it acts as primary among enabled bonds
> > ---------------------------------------------------------
> > -- pinctrl-0: pin control group to be used for this channel.
> > -- pinctrl-names: must be "default".
> > -- renesas,primary-bond: empty property indicating the channel acts as
> primary
> > -			among the bonded channels.
> > -- port: child port node corresponding to the data input, in accordance with
> > -	the video interface bindings defined in
> > -	Documentation/devicetree/bindings/media/video-interfaces.txt. The
> port
> > -	node must contain at least one endpoint.
> > -
> > -Optional endpoint property:
> > ----------------------------
> > -- sync-active: Indicates sync signal polarity, 0/1 for low/high respectively.
> > -	       This property maps to SYNCAC bit in the hardware manual. The
> > -	       default is 1 (active high).
> > -
> > -Example:
> > ---------
> > -
> > -(1) Both internal channels enabled:
> > ------------------------------------
> > -
> > -When interfacing with a third party tuner device with two data pins as shown
> > -below.
> > -
> > -+---------------------+                +---------------------+
> > -|                     |-----SCK------->|CLK                  |
> > -|       Master        |-----SS-------->|SYNC  DRIFn (slave)  |
> > -|                     |-----SD0------->|D0                   |
> > -|                     |-----SD1------->|D1                   |
> > -+---------------------+                +---------------------+
> > -
> > -	drif00: rif@e6f40000 {
> > -		compatible = "renesas,r8a7795-drif",
> > -			     "renesas,rcar-gen3-drif";
> > -		reg = <0 0xe6f40000 0 0x64>;
> > -		interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
> > -		clocks = <&cpg CPG_MOD 515>;
> > -		clock-names = "fck";
> > -		dmas = <&dmac1 0x20>, <&dmac2 0x20>;
> > -		dma-names = "rx", "rx";
> > -		power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
> > -		renesas,bonding = <&drif01>;
> > -		renesas,primary-bond;
> > -		pinctrl-0 = <&drif0_pins>;
> > -		pinctrl-names = "default";
> > -		port {
> > -			drif0_ep: endpoint {
> > -			     remote-endpoint = <&tuner_ep>;
> > -			};
> > -		};
> > -	};
> > -
> > -	drif01: rif@e6f50000 {
> > -		compatible = "renesas,r8a7795-drif",
> > -			     "renesas,rcar-gen3-drif";
> > -		reg = <0 0xe6f50000 0 0x64>;
> > -		interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>;
> > -		clocks = <&cpg CPG_MOD 514>;
> > -		clock-names = "fck";
> > -		dmas = <&dmac1 0x22>, <&dmac2 0x22>;
> > -		dma-names = "rx", "rx";
> > -		power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
> > -		renesas,bonding = <&drif00>;
> > -	};
> > -
> > -
> > -(2) Internal channel 1 alone is enabled:
> > -----------------------------------------
> > -
> > -When interfacing with a third party tuner device with one data pin as shown
> > -below.
> > -
> > -+---------------------+                +---------------------+
> > -|                     |-----SCK------->|CLK                  |
> > -|       Master        |-----SS-------->|SYNC  DRIFn (slave)  |
> > -|                     |                |D0 (unused)          |
> > -|                     |-----SD-------->|D1                   |
> > -+---------------------+                +---------------------+
> > -
> > -	drif00: rif@e6f40000 {
> > -		compatible = "renesas,r8a7795-drif",
> > -			     "renesas,rcar-gen3-drif";
> > -		reg = <0 0xe6f40000 0 0x64>;
> > -		interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
> > -		clocks = <&cpg CPG_MOD 515>;
> > -		clock-names = "fck";
> > -		dmas = <&dmac1 0x20>, <&dmac2 0x20>;
> > -		dma-names = "rx", "rx";
> > -		power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
> > -		renesas,bonding = <&drif01>;
> > -	};
> > -
> > -	drif01: rif@e6f50000 {
> > -		compatible = "renesas,r8a7795-drif",
> > -			     "renesas,rcar-gen3-drif";
> > -		reg = <0 0xe6f50000 0 0x64>;
> > -		interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>;
> > -		clocks = <&cpg CPG_MOD 514>;
> > -		clock-names = "fck";
> > -		dmas = <&dmac1 0x22>, <&dmac2 0x22>;
> > -		dma-names = "rx", "rx";
> > -		power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
> > -		renesas,bonding = <&drif00>;
> > -		pinctrl-0 = <&drif0_pins>;
> > -		pinctrl-names = "default";
> > -		port {
> > -			drif0_ep: endpoint {
> > -			     remote-endpoint = <&tuner_ep>;
> > -			     sync-active = <0>;
> > -			};
> > -		};
> > -	};
> > diff --git a/Documentation/devicetree/bindings/media/renesas,drif.yaml
> b/Documentation/devicetree/bindings/media/renesas,drif.yaml
> > new file mode 100644
> > index 000000000000..3832ce837553
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/media/renesas,drif.yaml
> > @@ -0,0 +1,277 @@
> > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/media/renesas,drif.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Renesas R-Car Gen3 Digital Radio Interface Controller (DRIF)
> > +
> > +maintainers:
> > +  - Ramesh Shanmugasundaram <rashanmu@gmail.com>
> > +  - Fabrizio Castro <fabrizio.castro.jz@renesas.com>
> > +
> > +description: |
> > +  R-Car Gen3 DRIF is a SPI like receive only slave device. A general
> > +  representation of DRIF interfacing with a master device is shown below.
> > +
> > +  +---------------------+                +---------------------+
> > +  |                     |-----SCK------->|CLK                  |
> > +  |       Master        |-----SS-------->|SYNC  DRIFn (slave)  |
> > +  |                     |-----SD0------->|D0                   |
> > +  |                     |-----SD1------->|D1                   |
> > +  +---------------------+                +---------------------+
> > +
> > +  As per datasheet, each DRIF channel (drifn) is made up of two internal
> > +  channels (drifn0 & drifn1). These two internal channels share the common
> > +  CLK & SYNC. Each internal channel has its own dedicated resources like
> > +  irq, dma channels, address space & clock. This internal split is not
> > +  visible to the external master device.
> > +
> > +  The device tree model represents each internal channel as a separate node.
> > +  The internal channels sharing the CLK & SYNC are tied together by their
> > +  phandles using a property called "renesas,bonding". For the rest of
> > +  the documentation, unless explicitly stated, the word channel implies an
> > +  internal channel.
> > +
> > +  When both internal channels are enabled they need to be managed together
> > +  as one (i.e.) they cannot operate alone as independent devices. Out of the
> > +  two, one of them needs to act as a primary device that accepts common
> > +  properties of both the internal channels. This channel is identified by a
> > +  property called "renesas,primary-bond".
> > +
> > +  To summarize,
> > +     * When both the internal channels that are bonded together are enabled,
> > +       the zeroth channel is selected as primary-bond. This channels accepts
> > +       properties common to all the members of the bond.
> > +     * When only one of the bonded channels need to be enabled, the property
> > +       "renesas,bonding" or "renesas,primary-bond" will have no effect. That
> > +       enabled channel can act alone as any other independent device.
> > +
> > +properties:
> > +  compatible:
> > +    items:
> > +      - enum:
> > +        - renesas,r8a7795-drif        # R-Car H3
> > +        - renesas,r8a7796-drif        # R-Car M3-W
> 
> Note the bot error is from yamllint which just got added to the checks.
> Need 2 more spaces indent here.

Thank you for reporting this. Unfortunately I wasn't personally able to reproduce this,
but thankfully a colleague of mine (Prabhakar) was able to reproduce the warning on
his setup. I'll send a v5 to fix this.

Thanks,
Fab

> 
> With that,
> 
> Reviewed-by: Rob Herring <robh@kernel.org>