[PATCH v7 0/3] dt-bindings: net: can: convert three bindings to DT schema

[PATCH v7 0/3] dt-bindings: net: can: convert three bindings to DT schema

[Quchaosheng]

Three CAN controller bindings converted from free-form text to DT schema.

This is one series on one thread, not three separate replies. The previous
versions were posted as individual threads and re-sent several times, which
is what prompted Krzysztof to ask me to slow down. Nothing was queued while
that request stood.

What changed since v6: Rob reviewed all three on 09-21 and gave
Reviewed-by on ifi,canfd-1.0 and holt,hi311x. fsl,mpc5xxx-mscan came back
with four comments, all of which are addressed here.

ifi,canfd-1.0
	Unchanged.

holt,hi311x
	Unchanged apart from dropping the $ref to
	spi/spi-peripheral-props.yaml, which the example does not use
	(Krzysztof).

fsl,mpc5xxx-mscan
	clock-names is an ordered list of the five names and clocks is
	minItems 5, matching the single order the device trees use.
	fsl,mpc5121-mscan requires both. The if/then that only restated the
	enum of fsl,mscan-clock-source is gone, with the per-compatible
	defaults moved into the property description.
	fsl,mscan-clock-divider has a minimum of 1 because the driver
	divides by it. One example instead of two.

All three pass dt_binding_check clean.

Signed-off-by: Quchaosheng <quchaosheng000406@163.com>

Quchaosheng (3):
  dt-bindings: net: can: ifi,canfd-1.0: Convert to DT schema
  dt-bindings: net: can: holt,hi311x: Convert to DT schema
  dt-bindings: net: can: fsl,mpc5xxx-mscan: Convert to DT schema

 .../bindings/net/can/fsl,mpc5xxx-mscan.yaml   | 109 ++++++++++++++++++
 .../bindings/net/can/holt,hi311x.yaml         |  66 +++++++++++
 .../bindings/net/can/holt_hi311x.txt          |  23 ----
 .../bindings/net/can/ifi,canfd.yaml           |  46 ++++++++
 .../devicetree/bindings/net/can/ifi_canfd.txt |  15 ---
 .../bindings/net/can/mpc5xxx-mscan.txt        |  53 ---------
 6 files changed, 221 insertions(+), 91 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/net/can/fsl,mpc5xxx-mscan.yaml
 create mode 100644 Documentation/devicetree/bindings/net/can/holt,hi311x.yaml
 delete mode 100644 Documentation/devicetree/bindings/net/can/holt_hi311x.txt
 create mode 100644 Documentation/devicetree/bindings/net/can/ifi,canfd.yaml
 delete mode 100644 Documentation/devicetree/bindings/net/can/ifi_canfd.txt
 delete mode 100644 Documentation/devicetree/bindings/net/can/mpc5xxx-mscan.txt

-- 
2.43.0

[PATCH v7 1/3] dt-bindings: net: can: ifi,canfd-1.0: Convert to DT schema

[Quchaosheng]

Convert the IFI CAN-FD controller binding from free-form text to DT
schema.

Reference can-controller.yaml. interrupts is required: the driver obtains
it with platform_get_irq().

The example now uses the GIC and irq header defines instead of raw numbers.
The values are unchanged: GIC_SPI is 0, IRQ_TYPE_NONE is 0 and 1 is
IRQ_TYPE_EDGE_RISING. Rename the example node from canfd to can so that it
matches the $nodename pattern in can-controller.yaml.

Assisted-by: LLM
Signed-off-by: Quchaosheng <quchaosheng000406@163.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
---

v7:
 - Add Assisted-by and the Reviewed-by tag received on v6. No content change.

 .../bindings/net/can/ifi,canfd.yaml           | 46 +++++++++++++++++++
 .../devicetree/bindings/net/can/ifi_canfd.txt | 15 ------
 2 files changed, 46 insertions(+), 15 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/net/can/ifi,canfd.yaml
 delete mode 100644 Documentation/devicetree/bindings/net/can/ifi_canfd.txt

diff --git a/Documentation/devicetree/bindings/net/can/ifi,canfd.yaml b/Documentation/devicetree/bindings/net/can/ifi,canfd.yaml
new file mode 100644
index 000000000000..c8c3105c727b
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/can/ifi,canfd.yaml
@@ -0,0 +1,46 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/can/ifi,canfd.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: IFI CAN-FD Controller
+
+maintainers:
+  - Marc Kleine-Budde <mkl@pengutronix.de>
+
+description:
+  The I/F/I CAN-FD soft IP block connected to the platform bus. It is most
+  often synthesised into an FPGA or CPLD.
+
+allOf:
+  - $ref: can-controller.yaml#
+
+properties:
+  compatible:
+    const: ifi,canfd-1.0
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    can@ff220000 {
+        compatible = "ifi,canfd-1.0";
+        reg = <0xff220000 0x1000>;
+        interrupts = <GIC_SPI 43 IRQ_TYPE_NONE>;
+    };
+...
diff --git a/Documentation/devicetree/bindings/net/can/ifi_canfd.txt b/Documentation/devicetree/bindings/net/can/ifi_canfd.txt
deleted file mode 100644
index 20ea5c70ab82..000000000000
--- a/Documentation/devicetree/bindings/net/can/ifi_canfd.txt
+++ /dev/null
@@ -1,15 +0,0 @@
-IFI CANFD controller
---------------------
-
-Required properties:
-  - compatible: Should be "ifi,canfd-1.0"
-  - reg: Should contain CAN controller registers location and length
-  - interrupts: Should contain IRQ line for the CAN controller
-
-Example:
-
-	canfd0: canfd@ff220000 {
-		compatible = "ifi,canfd-1.0";
-		reg = <0xff220000 0x00001000>;
-		interrupts = <0 43 0>;
-	};
-- 
2.43.0

[PATCH v7 2/3] dt-bindings: net: can: holt,hi311x: Convert to DT schema

[Quchaosheng]

Convert the Holt HI-311X binding from free-form text to DT schema.

Reference can-controller.yaml. Keep the properties and the example as the
original text describes them, including clocks as a required property.

Assisted-by: LLM
Signed-off-by: Quchaosheng <quchaosheng000406@163.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
---

v7:
 - Add Assisted-by and the Reviewed-by tag received on v6.

 - Drop the $ref to spi/spi-peripheral-props.yaml. The example does not use
   SPI properties, so the reference is redundant (Krzysztof Kozlowski).
   Rob's Reviewed-by is kept: this is the only change against the v6 he
   reviewed, and it is the removal Krzysztof had asked for.

 .../bindings/net/can/holt,hi311x.yaml         | 66 +++++++++++++++++++
 .../bindings/net/can/holt_hi311x.txt          | 23 -------
 2 files changed, 66 insertions(+), 23 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/net/can/holt,hi311x.yaml
 delete mode 100644 Documentation/devicetree/bindings/net/can/holt_hi311x.txt

diff --git a/Documentation/devicetree/bindings/net/can/holt,hi311x.yaml b/Documentation/devicetree/bindings/net/can/holt,hi311x.yaml
new file mode 100644
index 000000000000..d9e3584590c6
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/can/holt,hi311x.yaml
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/can/holt,hi311x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Holt HI-311X stand-alone CAN controller
+
+maintainers:
+  - Marc Kleine-Budde <mkl@pengutronix.de>
+
+description:
+  The Holt HI-3110 is a stand-alone CAN controller with an SPI interface.
+
+allOf:
+  - $ref: can-controller.yaml#
+
+properties:
+  compatible:
+    const: holt,hi3110
+
+  reg:
+    description: SPI chip select.
+    maxItems: 1
+
+  clocks:
+    description: The clock feeding the CAN controller.
+    maxItems: 1
+
+  interrupts:
+    description: IRQ line for the CAN controller.
+    maxItems: 1
+
+  vdd-supply:
+    description: Regulator that powers the CAN controller.
+
+  xceiver-supply:
+    description: Regulator that powers the CAN transceiver.
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - interrupts
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        can@1 {
+            compatible = "holt,hi3110";
+            reg = <1>;
+            clocks = <&clk32m>;
+            interrupt-parent = <&gpio4>;
+            interrupts = <13 IRQ_TYPE_LEVEL_HIGH>;
+            vdd-supply = <&reg5v0>;
+            xceiver-supply = <&reg5v0>;
+        };
+    };
+...
diff --git a/Documentation/devicetree/bindings/net/can/holt_hi311x.txt b/Documentation/devicetree/bindings/net/can/holt_hi311x.txt
deleted file mode 100644
index 3a9926f99937..000000000000
--- a/Documentation/devicetree/bindings/net/can/holt_hi311x.txt
+++ /dev/null
@@ -1,23 +0,0 @@
-* Holt HI-311X stand-alone CAN controller device tree bindings
-
-Required properties:
- - compatible: Should be one of the following:
-   - "holt,hi3110" for HI-3110
- - reg: SPI chip select.
- - clocks: The clock feeding the CAN controller.
- - interrupts: Should contain IRQ line for the CAN controller.
-
-Optional properties:
- - vdd-supply: Regulator that powers the CAN controller.
- - xceiver-supply: Regulator that powers the CAN transceiver.
-
-Example:
-	can0: can@1 {
-		compatible = "holt,hi3110";
-		reg = <1>;
-		clocks = <&clk32m>;
-		interrupt-parent = <&gpio4>;
-		interrupts = <13 IRQ_TYPE_LEVEL_HIGH>;
-		vdd-supply = <&reg5v0>;
-		xceiver-supply = <&reg5v0>;
-	};
-- 
2.43.0

Re: [PATCH v7 2/3] dt-bindings: net: can: holt,hi311x: Convert to DT schema

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [Medium] dt-bindings: missing spi-peripheral-props.yaml reference rejects valid SPI properties
--

commit daeb2992a77029d59549250b99f2dd7fac156a7f
Author: Quchaosheng <quchaosheng000406@163.com>

dt-bindings: net: can: holt,hi311x: Convert to DT schema

This commit converts the Holt HI-311X stand-alone CAN controller bindings
from free-form text to DT schema format. It establishes the base properties
using can-controller.yaml and strictly enforces them.

> diff --git a/Documentation/devicetree/bindings/net/can/holt,hi311x.yaml b/Documentation/devicetree/bindings/net/can/holt,hi311x.yaml
> new file mode 100644
> index 0000000000000..d9e3584590c65
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/can/holt,hi311x.yaml
[ ... ]
> +allOf:
> +  - $ref: can-controller.yaml#

[Severity: Medium]
Since this device sits on an SPI bus, doesn't it need a reference to
/schemas/spi/spi-peripheral-props.yaml# here to support standard SPI
properties?

The v7 changelog mentions dropping this reference because the example doesn't
use SPI properties. However, real-world device trees that instantiate this
SPI device will routinely provide standard SPI properties, such as
spi-max-frequency.

[ ... ]
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - interrupts
> +
> +unevaluatedProperties: false

[Severity: Medium]
Because unevaluatedProperties is set to false here, the missing reference to
spi-peripheral-props.yaml means any standard SPI bus configuration properties
will be treated as invalid by the schema tools.

Will this cause dtbs_check to reject valid device tree nodes that include
necessary SPI properties?

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260922084542.104788-1-quchaosheng000406@163.com?part=2

[PATCH v7 3/3] dt-bindings: net: can: fsl,mpc5xxx-mscan: Convert to DT schema

[Quchaosheng]

Convert the Freescale MPC5xxx MSCAN binding from free-form text to DT
schema.

The original text documents fsl,mpc5200-mscan and fsl,mpc5121-mscan in two
separate sections. Keep that split: fsl,mscan-clock-source takes "ip" or
"ref" on fsl,mpc5200-mscan, and "ip", "ref" or "sys" on fsl,mpc5121-mscan.

Add fsl,mpc5200b-mscan as a fallback of fsl,mpc5200-mscan. mpc5200b.dtsi
uses it.

Document clocks and clock-names, which the original text does not describe.
fsl,mpc5121-mscan requires the "ipg", "ips", "sys", "ref" and "mclk"
clocks in that order, as mpc5121.dtsi supplies them. MPC5200 does not use
DT clocks; it takes its frequency from the CDM block.

fsl,mscan-clock-divider divides the selected clock, so value 0 cannot be
used.

Keep the note that the MPC5121 Rev. 1 processor is not supported.

Assisted-by: LLM
Signed-off-by: Quchaosheng <quchaosheng000406@163.com>
---

v7:
 - clock-names is an ordered list of the five names and clocks is minItems 5,
   as the one order used by the device trees is documented. fsl,mpc5121-mscan
   now requires both properties.

 - Drop the if/then for fsl,mpc5121-mscan that only restated the enum of
   fsl,mscan-clock-source. The description of the two per-compatible defaults
   moved to the property itself.

 - fsl,mscan-clock-divider has a minimum of 1; the driver divides by it.

 - One example, which now shows the required clocks.

 - Add Assisted-by.

 .../bindings/net/can/fsl,mpc5xxx-mscan.yaml   | 109 ++++++++++++++++++
 .../bindings/net/can/mpc5xxx-mscan.txt        |  53 ---------
 2 files changed, 109 insertions(+), 53 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/net/can/fsl,mpc5xxx-mscan.yaml
 delete mode 100644 Documentation/devicetree/bindings/net/can/mpc5xxx-mscan.txt

diff --git a/Documentation/devicetree/bindings/net/can/fsl,mpc5xxx-mscan.yaml b/Documentation/devicetree/bindings/net/can/fsl,mpc5xxx-mscan.yaml
new file mode 100644
index 000000000000..77aa46fd62ac
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/can/fsl,mpc5xxx-mscan.yaml
@@ -0,0 +1,109 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/can/fsl,mpc5xxx-mscan.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale MPC5xxx MSCAN controller
+
+maintainers:
+  - Marc Kleine-Budde <mkl@pengutronix.de>
+
+description:
+  The MSCAN controller found on the Freescale MPC5200 and MPC5121 SoCs. The
+  MPC5121 Rev. 1 processor is not supported.
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - fsl,mpc5200b-mscan
+          - const: fsl,mpc5200-mscan
+      - enum:
+          - fsl,mpc5200-mscan
+          - fsl,mpc5121-mscan
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    description:
+      Clocks feeding the controller. fsl,mpc5200-mscan takes its frequency
+      from the CDM block and does not use DT clocks.
+    minItems: 5
+    maxItems: 5
+
+  clock-names:
+    items:
+      - const: ipg
+      - const: ips
+      - const: sys
+      - const: ref
+      - const: mclk
+
+  fsl,mscan-clock-source:
+    description:
+      Clock source used for the controller. When the property is not present,
+      fsl,mpc5200-mscan uses the reference clock, while fsl,mpc5121-mscan
+      selects an optimal clock source and frequency based on the system clock
+      and uses the reference clock when that is not possible.
+    enum: [ip, ref, sys]
+
+  fsl,mscan-clock-divider:
+    description: Additional clock divider for the reference and system clocks.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 1
+    default: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+allOf:
+  - $ref: can-controller.yaml#
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: fsl,mpc5200-mscan
+    then:
+      properties:
+        fsl,mscan-clock-source:
+          enum: [ip, ref]
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: fsl,mpc5121-mscan
+    then:
+      required:
+        - clocks
+        - clock-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/mpc512x-clock.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    can@1300 {
+        compatible = "fsl,mpc5121-mscan";
+        reg = <0x1300 0x80>;
+        interrupts = <12 IRQ_TYPE_LEVEL_LOW>;
+        interrupt-parent = <&ipic>;
+        clocks = <&clks MPC512x_CLK_BDLC>, <&clks MPC512x_CLK_IPS>,
+                 <&clks MPC512x_CLK_SYS>, <&clks MPC512x_CLK_REF>,
+                 <&clks MPC512x_CLK_MSCAN0_MCLK>;
+        clock-names = "ipg", "ips", "sys", "ref", "mclk";
+        fsl,mscan-clock-source = "ref";
+        fsl,mscan-clock-divider = <3>;
+    };
+...
diff --git a/Documentation/devicetree/bindings/net/can/mpc5xxx-mscan.txt b/Documentation/devicetree/bindings/net/can/mpc5xxx-mscan.txt
deleted file mode 100644
index 2fa4fcd38fd6..000000000000
--- a/Documentation/devicetree/bindings/net/can/mpc5xxx-mscan.txt
+++ /dev/null
@@ -1,53 +0,0 @@
-CAN Device Tree Bindings
-------------------------
-
-(c) 2006-2009 Secret Lab Technologies Ltd
-Grant Likely <grant.likely@secretlab.ca>
-
-fsl,mpc5200-mscan nodes
------------------------
-In addition to the required compatible-, reg- and interrupt-properties, you can
-also specify which clock source shall be used for the controller:
-
-- fsl,mscan-clock-source : a string describing the clock source. Valid values
-			   are:	"ip" for ip bus clock
-				 "ref" for reference clock (XTAL)
-			   "ref" is default in case this property is not
-			   present.
-
-fsl,mpc5121-mscan nodes
------------------------
-In addition to the required compatible-, reg- and interrupt-properties, you can
-also specify which clock source and divider shall be used for the controller:
-
-- fsl,mscan-clock-source : a string describing the clock source. Valid values
-			   are:	"ip" for ip bus clock
-				"ref" for reference clock
-				"sys" for system clock
-			   If this property is not present, an optimal CAN
-			   clock source and frequency based on the system
-			   clock will be selected. If this is not possible,
-			   the reference clock will be used.
-
-- fsl,mscan-clock-divider: for the reference and system clock, an additional
-			   clock divider can be specified. By default, a
-			   value of 1 is used.
-
-Note that the MPC5121 Rev. 1 processor is not supported.
-
-Examples:
-	can@1300 {
-		compatible = "fsl,mpc5121-mscan";
-		interrupts = <12 0x8>;
-		interrupt-parent = <&ipic>;
-		reg = <0x1300 0x80>;
-	};
-
-	can@1380 {
-		compatible = "fsl,mpc5121-mscan";
-		interrupts = <13 0x8>;
-		interrupt-parent = <&ipic>;
-		reg = <0x1380 0x80>;
-		fsl,mscan-clock-source = "ref";
-		fsl,mscan-clock-divider = <3>;
-	};
-- 
2.43.0