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Message-Id: <20220919081333.15678-1-angelogioacchino.delregno@collabora.com>
Date: Mon, 19 Sep 2022 10:13:33 +0200
From: AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>
To: robh+dt@...nel.org
Cc: jassisinghbrar@...il.com, krzysztof.kozlowski+dt@...aro.org,
matthias.bgg@...il.com, houlong.wei@...iatek.com,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>
Subject: [PATCH v3] dt-bindings: mailbox: Convert mtk-gce to DT schema
Convert the mtk-gce mailbox binding to DT schema format.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
Changes in v3:
- Removed '|' from description
- Removed mbox client examples
- Squashed patch dt-bindings: arm: mediatek:
mmsys: Reference to mediatek,gce-mailbox.yaml
Changes in v2:
- Changed mtk-gce.txt references to new yaml file
A previous attempt for this was made at [1], but it was changing
the way of getting clocks (by name for all).
Keeping clock-names not required for the multi-gce case makes this
binding simpler, hence I chose to abandon the change at [1] and go
for this one instead.
Any Reviewed-by or Acked-by tag was dropped, as this conversion was
completely redone from scratch and differs from [1] for the
aforementioned reasons.
[1]: https://lore.kernel.org/all/20220524151512.247435-1-angelogioacchino.delregno@collabora.com/
.../bindings/arm/mediatek/mediatek,mmsys.yaml | 3 +-
.../mailbox/mediatek,gce-mailbox.yaml | 80 ++++++++++++++++++
.../devicetree/bindings/mailbox/mtk-gce.txt | 82 -------------------
3 files changed, 82 insertions(+), 83 deletions(-)
create mode 100644 Documentation/devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml
delete mode 100644 Documentation/devicetree/bindings/mailbox/mtk-gce.txt
diff --git a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml
index 6ad023eec193..85e6f4f621fc 100644
--- a/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml
+++ b/Documentation/devicetree/bindings/arm/mediatek/mediatek,mmsys.yaml
@@ -52,7 +52,8 @@ properties:
description:
Using mailbox to communicate with GCE, it should have this
property and list of phandle, mailbox specifiers. See
- Documentation/devicetree/bindings/mailbox/mtk-gce.txt for details.
+ Documentation/devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml
+ for details.
$ref: /schemas/types.yaml#/definitions/phandle-array
mediatek,gce-client-reg:
diff --git a/Documentation/devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml b/Documentation/devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml
new file mode 100644
index 000000000000..fff8fd2e984a
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/mediatek,gce-mailbox.yaml
@@ -0,0 +1,80 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mailbox/mediatek,gce-mailbox.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mediatek Global Command Engine Mailbox
+
+maintainers:
+ - Houlong Wei <houlong.wei@...iatek.com>
+
+description:
+ The Global Command Engine (GCE) is used to help read/write registers with
+ critical time limitation, such as updating display configuration during the
+ vblank. The GCE can be used to implement the Command Queue (CMDQ) driver.
+
+properties:
+ compatible:
+ enum:
+ - mediatek,mt6779-gce
+ - mediatek,mt8173-gce
+ - mediatek,mt8183-gce
+ - mediatek,mt8186-gce
+ - mediatek,mt8192-gce
+ - mediatek,mt8195-gce
+
+ "#mbox-cells":
+ const: 2
+ description:
+ The first cell describes the Thread ID of the GCE,
+ the second cell describes the priority of the GCE thread
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ items:
+ - description: Global Command Engine clock
+
+ clock-names:
+ items:
+ - const: gce
+
+required:
+ - compatible
+ - "#mbox-cells"
+ - reg
+ - interrupts
+ - clocks
+
+if:
+ not:
+ properties:
+ compatible:
+ contains:
+ const: mediatek,mt8195-gce
+then:
+ required:
+ - clock-names
+
+additionalProperties: false
+
+examples:
+ # Example for a device client and for a MediaTek mutex client
+ - |
+ #include <dt-bindings/clock/mt8173-clk.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ gce: mailbox@...20000 {
+ compatible = "mediatek,mt8173-gce";
+ reg = <0x10816000 0x1000>;
+ interrupts = <GIC_SPI 135 IRQ_TYPE_LEVEL_LOW>;
+ #mbox-cells = <2>;
+ clocks = <&infracfg CLK_INFRA_GCE>;
+ clock-names = "gce";
+ };
diff --git a/Documentation/devicetree/bindings/mailbox/mtk-gce.txt b/Documentation/devicetree/bindings/mailbox/mtk-gce.txt
deleted file mode 100644
index c2aeba63bd47..000000000000
--- a/Documentation/devicetree/bindings/mailbox/mtk-gce.txt
+++ /dev/null
@@ -1,82 +0,0 @@
-MediaTek GCE
-===============
-
-The Global Command Engine (GCE) is used to help read/write registers with
-critical time limitation, such as updating display configuration during the
-vblank. The GCE can be used to implement the Command Queue (CMDQ) driver.
-
-CMDQ driver uses mailbox framework for communication. Please refer to
-mailbox.txt for generic information about mailbox device-tree bindings.
-
-Required properties:
-- compatible: can be "mediatek,mt8173-gce", "mediatek,mt8183-gce",
- "mediatek,mt8186-gce", "mediatek,mt8192-gce", "mediatek,mt8195-gce" or
- "mediatek,mt6779-gce".
-- reg: Address range of the GCE unit
-- interrupts: The interrupt signal from the GCE block
-- clock: Clocks according to the common clock binding
-- clock-names: Must be "gce" to stand for GCE clock
-- #mbox-cells: Should be 2.
- <&phandle channel priority>
- phandle: Label name of a gce node.
- channel: Channel of mailbox. Be equal to the thread id of GCE.
- priority: Priority of GCE thread.
-
-Required properties for a client device:
-- mboxes: Client use mailbox to communicate with GCE, it should have this
- property and list of phandle, mailbox specifiers.
-Optional properties for a client device:
-- mediatek,gce-client-reg: Specify the sub-system id which is corresponding
- to the register address, it should have this property and list of phandle,
- sub-system specifiers.
- <&phandle subsys_number start_offset size>
- phandle: Label name of a gce node.
- subsys_number: specify the sub-system id which is corresponding
- to the register address.
- start_offset: the start offset of register address that GCE can access.
- size: the total size of register address that GCE can access.
-
-Optional properties for a client mutex node:
-- mediatek,gce-events: GCE events used by clients. The event numbers are
- defined in 'dt-bindings/gce/<chip>-gce.h'.
-
-Some vaules of properties are defined in 'dt-bindings/gce/mt8173-gce.h',
-'dt-bindings/gce/mt8183-gce.h', 'dt-bindings/gce/mt8186-gce.h'
-'dt-bindings/gce/mt8192-gce.h', 'dt-bindings/gce/mt8195-gce.h' or
-'dt-bindings/gce/mt6779-gce.h'.
-Such as sub-system ids, thread priority, event ids.
-
-Example:
-
- gce: gce@...12000 {
- compatible = "mediatek,mt8173-gce";
- reg = <0 0x10212000 0 0x1000>;
- interrupts = <GIC_SPI 135 IRQ_TYPE_LEVEL_LOW>;
- clocks = <&infracfg CLK_INFRA_GCE>;
- clock-names = "gce";
- #mbox-cells = <2>;
- };
-
-Example for a client device:
-
- mmsys: clock-controller@...00000 {
- compatible = "mediatek,mt8173-mmsys";
- mboxes = <&gce 0 CMDQ_THR_PRIO_LOWEST>,
- <&gce 1 CMDQ_THR_PRIO_LOWEST>;
- mutex-event-eof = <CMDQ_EVENT_MUTEX0_STREAM_EOF
- CMDQ_EVENT_MUTEX1_STREAM_EOF>;
- mediatek,gce-client-reg = <&gce SUBSYS_1400XXXX 0x3000 0x1000>,
- <&gce SUBSYS_1401XXXX 0x2000 0x100>;
- ...
- };
-
-Example for a client mutex node:
- mutex: mutex@...20000 {
- compatible = "mediatek,mt8173-disp-mutex";
- reg = <0 0x14020000 0 0x1000>;
- interrupts = <GIC_SPI 169 IRQ_TYPE_LEVEL_LOW>;
- power-domains = <&scpsys MT8173_POWER_DOMAIN_MM>;
- clocks = <&mmsys CLK_MM_MUTEX_32K>;
- mediatek,gce-events = <CMDQ_EVENT_MUTEX0_STREAM_EOF>,
- <CMDQ_EVENT_MUTEX1_STREAM_EOF>;
- };
--
2.37.2
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