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Commit 4ff1dfc3 authored by Fabrizio Castro's avatar Fabrizio Castro Committed by Mauro Carvalho Chehab
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media: dt-bindings: media: renesas,drif: Convert to json-schema 

Convert the Renesas DRIF bindings to DT schema and update
MAINTAINERS accordingly.
Signed-off-by: default avatarFabrizio Castro <fabrizio.castro.jz@renesas.com>
Reviewed-by: default avatarLad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent 852752ee
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Documentation/devicetree/bindings/media/renesas,drif.txt deleted 100644 → 0
View file @ 852752ee
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>;
};
};
};
Documentation/devicetree/bindings/media/renesas,drif.yaml 0 → 100644
View file @ 4ff1dfc3
# 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>;
};
};
};
};
...
MAINTAINERS
View file @ 4ff1dfc3
......@@ -11109,7 +11109,7 @@ 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
......
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