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Message-ID: <20210426155457.21221-2-nm@ti.com>
Date: Mon, 26 Apr 2021 10:54:54 -0500
From: Nishanth Menon <nm@...com>
To: Rob Herring <robh@...nel.org>, Stephen Boyd <sboyd@...nel.org>,
Tero Kristo <kristo@...nel.org>
CC: Philipp Zabel <p.zabel@...gutronix.de>,
Michael Turquette <mturquette@...libre.com>,
Santosh Shilimkar <ssantosh@...nel.org>,
<linux-clk@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<devicetree@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>, Nishanth Menon <nm@...com>
Subject: [PATCH V2 1/4] dt-bindings: reset: Convert ti,sci-reset to json schema
Convert the ti,sci-reset to json schema for better checks and documentation.
Differences being:
- Drop consumer example as they are documented in the corresponding
bindings themselves.
- Drop phandle description for reset consumer or cell definition as it is
redundant.
Signed-off-by: Nishanth Menon <nm@...com>
Reviewed-by: Rob Herring <robh@...nel.org>
Reviewed-by: Tero Kristo <kristo@...nel.org>
---
Changes since V1:
* reviewed by from Tero and Rob
https://lore.kernel.org/linux-arm-kernel/20210421223254.GA1734415@robh.at.kernel.org/
https://lore.kernel.org/linux-arm-kernel/56388707-c8d3-ebdf-77a2-c5a983856b4d@kernel.org/
* Updated commit message to drop the 'checkpatch warning'
v1: https://lore.kernel.org/linux-arm-kernel/20210416063721.20538-2-nm@ti.com/
.../bindings/reset/ti,sci-reset.txt | 62 -------------------
.../bindings/reset/ti,sci-reset.yaml | 51 +++++++++++++++
2 files changed, 51 insertions(+), 62 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/reset/ti,sci-reset.txt
create mode 100644 Documentation/devicetree/bindings/reset/ti,sci-reset.yaml
diff --git a/Documentation/devicetree/bindings/reset/ti,sci-reset.txt b/Documentation/devicetree/bindings/reset/ti,sci-reset.txt
deleted file mode 100644
index 8b1cf022f18a..000000000000
--- a/Documentation/devicetree/bindings/reset/ti,sci-reset.txt
+++ /dev/null
@@ -1,62 +0,0 @@
-Texas Instruments System Control Interface (TI-SCI) Reset Controller
-=====================================================================
-
-Some TI SoCs contain a system controller (like the Power Management Micro
-Controller (PMMC) on Keystone 66AK2G SoC) that are responsible for controlling
-the state of the various hardware modules present on the SoC. Communication
-between the host processor running an OS and the system controller happens
-through a protocol called TI System Control Interface (TI-SCI protocol).
-For TI SCI details, please refer to the document,
-Documentation/devicetree/bindings/arm/keystone/ti,sci.txt
-
-TI-SCI Reset Controller Node
-============================
-This reset controller node uses the TI SCI protocol to perform the reset
-management of various hardware modules present on the SoC. Must be a child
-node of the associated TI-SCI system controller node.
-
-Required properties:
---------------------
- - compatible : Should be "ti,sci-reset"
- - #reset-cells : Should be 2. Please see the reset consumer node below for
- usage details.
-
-TI-SCI Reset Consumer Nodes
-===========================
-Each of the reset consumer nodes should have the following properties,
-in addition to their own properties.
-
-Required properties:
---------------------
- - resets : A phandle and reset specifier pair, one pair for each reset
- signal that affects the device, or that the device manages.
- The phandle should point to the TI-SCI reset controller node,
- and the reset specifier should have 2 cell-values. The first
- cell should contain the device ID. The second cell should
- contain the reset mask value used by system controller.
- Please refer to the protocol documentation for these values
- to be used for different devices,
- http://processors.wiki.ti.com/index.php/TISCI#66AK2G02_Data
-
-Please also refer to Documentation/devicetree/bindings/reset/reset.txt for
-common reset controller usage by consumers.
-
-Example:
---------
-The following example demonstrates both a TI-SCI reset controller node and a
-consumer (a DSP device) on the 66AK2G SoC.
-
-pmmc: pmmc {
- compatible = "ti,k2g-sci";
-
- k2g_reset: reset-controller {
- compatible = "ti,sci-reset";
- #reset-cells = <2>;
- };
-};
-
-dsp0: dsp@...00000 {
- ...
- resets = <&k2g_reset 0x0046 0x1>;
- ...
-};
diff --git a/Documentation/devicetree/bindings/reset/ti,sci-reset.yaml b/Documentation/devicetree/bindings/reset/ti,sci-reset.yaml
new file mode 100644
index 000000000000..4639d2cec557
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/ti,sci-reset.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/reset/ti,sci-reset.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI-SCI reset controller node bindings
+
+maintainers:
+ - Nishanth Menon <nm@...com>
+
+description: |
+ Some TI SoCs contain a system controller (like the Power Management Micro
+ Controller (PMMC) on Keystone 66AK2G SoC) that are responsible for controlling
+ the state of the various hardware modules present on the SoC. Communication
+ between the host processor running an OS and the system controller happens
+ through a protocol called TI System Control Interface (TI-SCI protocol).
+
+ This reset controller node uses the TI SCI protocol to perform the reset
+ management of various hardware modules present on the SoC. Must be a child
+ node of the associated TI-SCI system controller node.
+
+properties:
+ $nodename:
+ pattern: "^reset-controller$"
+
+ compatible:
+ const: ti,sci-reset
+
+ "#reset-cells":
+ const: 2
+ description:
+ The two cells represent values that the TI-SCI controller defines.
+
+ The first cell should contain the device ID.
+
+ The second cell should contain the reset mask corresponding to the device
+ used by system controller.
+
+ Please see http://processors.wiki.ti.com/index.php/TISCI for
+ protocol documentation for the values to be used for different devices.
+
+
+additionalProperties: false
+
+examples:
+ - |
+ k3_reset: reset-controller {
+ compatible = "ti,sci-reset";
+ #reset-cells = <2>;
+ };
--
2.31.0
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