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Message-Id: <1591007864-30267-1-git-send-email-Anson.Huang@nxp.com>
Date: Mon, 1 Jun 2020 18:37:44 +0800
From: Anson Huang <Anson.Huang@....com>
To: robh+dt@...nel.org, linux@...pel-privat.de, peng.fan@....com,
jaswinder.singh@...aro.org, hongxing.zhu@....com,
aisheng.dong@....com, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: Linux-imx@....com
Subject: [PATCH] dt-bindings: mailbox: Convert imx mu to json-schema
Convert the i.MX MU binding to DT schema format using json-schema
Signed-off-by: Anson Huang <Anson.Huang@....com>
---
.../devicetree/bindings/mailbox/fsl,mu.txt | 58 --------------
.../devicetree/bindings/mailbox/fsl,mu.yaml | 89 ++++++++++++++++++++++
2 files changed, 89 insertions(+), 58 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/mailbox/fsl,mu.txt
create mode 100644 Documentation/devicetree/bindings/mailbox/fsl,mu.yaml
diff --git a/Documentation/devicetree/bindings/mailbox/fsl,mu.txt b/Documentation/devicetree/bindings/mailbox/fsl,mu.txt
deleted file mode 100644
index 26b7a88..0000000
--- a/Documentation/devicetree/bindings/mailbox/fsl,mu.txt
+++ /dev/null
@@ -1,58 +0,0 @@
-NXP i.MX Messaging Unit (MU)
---------------------------------------------------------------------
-
-The Messaging Unit module enables two processors within the SoC to
-communicate and coordinate by passing messages (e.g. data, status
-and control) through the MU interface. The MU also provides the ability
-for one processor to signal the other processor using interrupts.
-
-Because the MU manages the messaging between processors, the MU uses
-different clocks (from each side of the different peripheral buses).
-Therefore, the MU must synchronize the accesses from one side to the
-other. The MU accomplishes synchronization using two sets of matching
-registers (Processor A-facing, Processor B-facing).
-
-Messaging Unit Device Node:
-=============================
-
-Required properties:
--------------------
-- compatible : should be "fsl,<chip>-mu", the supported chips include
- imx6sx, imx7s, imx8qxp, imx8qm.
- The "fsl,imx6sx-mu" compatible is seen as generic and should
- be included together with SoC specific compatible.
- There is a version 1.0 MU on imx7ulp, use "fsl,imx7ulp-mu"
- compatible to support it.
- To communicate with i.MX8 SCU, "fsl,imx8-mu-scu" could be
- used for fast IPC
-- reg : Should contain the registers location and length
-- interrupts : Interrupt number. The interrupt specifier format depends
- on the interrupt controller parent.
-- #mbox-cells: Must be 2.
- <&phandle type channel>
- phandle : Label name of controller
- type : Channel type
- channel : Channel number
-
- This MU support 4 type of unidirectional channels, each type
- has 4 channels. A total of 16 channels. Following types are
- supported:
- 0 - TX channel with 32bit transmit register and IRQ transmit
- acknowledgment support.
- 1 - RX channel with 32bit receive register and IRQ support
- 2 - TX doorbell channel. Without own register and no ACK support.
- 3 - RX doorbell channel.
-
-Optional properties:
--------------------
-- clocks : phandle to the input clock.
-- fsl,mu-side-b : Should be set for side B MU.
-
-Examples:
---------
-lsio_mu0: mailbox@...b0000 {
- compatible = "fsl,imx8qxp-mu", "fsl,imx6sx-mu";
- reg = <0x0 0x5d1b0000 0x0 0x10000>;
- interrupts = <GIC_SPI 176 IRQ_TYPE_LEVEL_HIGH>;
- #mbox-cells = <2>;
-};
diff --git a/Documentation/devicetree/bindings/mailbox/fsl,mu.yaml b/Documentation/devicetree/bindings/mailbox/fsl,mu.yaml
new file mode 100644
index 0000000..93db996
--- /dev/null
+++ b/Documentation/devicetree/bindings/mailbox/fsl,mu.yaml
@@ -0,0 +1,89 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mailbox/fsl,mu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP i.MX Messaging Unit (MU)
+
+maintainers:
+ - Dong Aisheng <aisheng.dong@....com>
+
+description: |
+ The Messaging Unit module enables two processors within the SoC to
+ communicate and coordinate by passing messages (e.g. data, status
+ and control) through the MU interface. The MU also provides the ability
+ for one processor to signal the other processor using interrupts.
+
+ Because the MU manages the messaging between processors, the MU uses
+ different clocks (from each side of the different peripheral buses).
+ Therefore, the MU must synchronize the accesses from one side to the
+ other. The MU accomplishes synchronization using two sets of matching
+ registers (Processor A-facing, Processor B-facing).
+
+properties:
+ compatible:
+ oneOf:
+ - const: fsl,imx6sx-mu
+ - const: fsl,imx7ulp-mu
+ - const: fsl,imx8-mu-scu
+ - items:
+ - enum:
+ - fsl,imx7s-mu
+ - fsl,imx8mq-mu
+ - fsl,imx8mm-mu
+ - fsl,imx8mn-mu
+ - fsl,imx8mp-mu
+ - fsl,imx8qxp-mu
+ - const: fsl,imx6sx-mu
+ - description: To communicate with i.MX8 SCU with fast IPC
+ items:
+ - const: fsl,imx8qxp-mu
+ - const: fsl,imx8-mu-scu
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ "#mbox-cells":
+ description: |
+ <&phandle type channel>
+ phandle : Label name of controller
+ type : Channel type
+ channel : Channel number
+
+ This MU support 4 type of unidirectional channels, each type
+ has 4 channels. A total of 16 channels. Following types are
+ supported:
+ 0 - TX channel with 32bit transmit register and IRQ transmit
+ acknowledgment support.
+ 1 - RX channel with 32bit receive register and IRQ support
+ 2 - TX doorbell channel. Without own register and no ACK support.
+ 3 - RX doorbell channel.
+ const: 2
+
+ clocks:
+ maxItems: 1
+
+ fsl,mu-side-b:
+ description: boolean, if present, means it is for side B MU.
+ type: boolean
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - "#mbox-cells"
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ mailbox@...b0000 {
+ compatible = "fsl,imx8qxp-mu", "fsl,imx6sx-mu";
+ reg = <0x0 0x5d1b0000 0x0 0x10000>;
+ interrupts = <GIC_SPI 176 IRQ_TYPE_LEVEL_HIGH>;
+ #mbox-cells = <2>;
+ };
--
2.7.4
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