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Message-Id: <20250523191844.563177-1-Frank.Li@nxp.com>
Date: Fri, 23 May 2025 15:18:43 -0400
From: Frank Li <Frank.Li@....com>
To: Lee Jones <lee@...nel.org>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Shawn Guo <shawnguo@...nel.org>,
Sascha Hauer <s.hauer@...gutronix.de>,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Fabio Estevam <festevam@...il.com>,
devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS),
imx@...ts.linux.dev (open list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE),
linux-arm-kernel@...ts.infradead.org (moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE),
linux-kernel@...r.kernel.org (open list)
Cc: imx@...ts.linux.dev
Subject: [PATCH 1/1] dt-bindings: mfd: convert mxs-lradc.txt to yaml format
Convert mxs-lradc.txt to yaml format.
Additional changes:
- Only keep one example.
- Change node name to adc.
- Add clocks and #io-channel-cells.
Signed-off-by: Frank Li <Frank.Li@....com>
---
.../bindings/mfd/fsl,imx28-lradc.yaml | 85 +++++++++++++++++++
.../devicetree/bindings/mfd/mxs-lradc.txt | 45 ----------
2 files changed, 85 insertions(+), 45 deletions(-)
create mode 100644 Documentation/devicetree/bindings/mfd/fsl,imx28-lradc.yaml
delete mode 100644 Documentation/devicetree/bindings/mfd/mxs-lradc.txt
diff --git a/Documentation/devicetree/bindings/mfd/fsl,imx28-lradc.yaml b/Documentation/devicetree/bindings/mfd/fsl,imx28-lradc.yaml
new file mode 100644
index 0000000000000..665e780ff966d
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/fsl,imx28-lradc.yaml
@@ -0,0 +1,85 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/fsl,imx28-lradc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale MXS LRADC
+
+maintainers:
+ - Frank Li <Frank.Li@....com>
+
+properties:
+ compatible:
+ enum:
+ - fsl,imx23-lradc
+ - fsl,imx28-lradc
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ minItems: 1
+ maxItems: 13
+
+ '#io-channel-cells':
+ const: 1
+
+ clocks:
+ maxItems: 1
+
+ fsl,lradc-touchscreen-wires:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [4, 5]
+ description:
+ Number of wires used to connect the touchscreen
+ to LRADC. Valid value is either 4 or 5. If this
+ property is not present, then the touchscreen is
+ disabled. 5 wires is valid for i.MX28 SoC only.
+
+ fsl,ave-ctrl:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ default: 4
+ minimum: 1
+ maximum: 32
+ description:
+ number of samples per direction to calculate an average value.
+
+ fsl,ave-delay:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ minimum: 2
+ maximum: 2048
+ description:
+ delay between consecutive samples.
+ It is used if 'fsl,ave-ctrl' > 1, counts at
+ 2 kHz and its default is 2 (= 1 ms)
+
+
+ fsl,settling:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ minimum: 1
+ maximum: 2047
+ description:
+ delay between plate switch to next sample.
+ It counts at 2 kHz and its default is 10 (= 5 ms)
+
+
+required:
+ - compatible
+ - reg
+ - interrupts
+
+additionalProperties: false
+
+examples:
+ - |
+ adc@...50000 {
+ compatible = "fsl,imx23-lradc";
+ reg = <0x80050000 0x2000>;
+ interrupts = <36 37 38 39 40 41 42 43 44>;
+ fsl,lradc-touchscreen-wires = <4>;
+ fsl,ave-ctrl = <4>;
+ fsl,ave-delay = <2>;
+ fsl,settling = <10>;
+ };
+
diff --git a/Documentation/devicetree/bindings/mfd/mxs-lradc.txt b/Documentation/devicetree/bindings/mfd/mxs-lradc.txt
deleted file mode 100644
index 755cbef0647df..0000000000000
--- a/Documentation/devicetree/bindings/mfd/mxs-lradc.txt
+++ /dev/null
@@ -1,45 +0,0 @@
-* Freescale MXS LRADC device driver
-
-Required properties:
-- compatible: Should be "fsl,imx23-lradc" for i.MX23 SoC and "fsl,imx28-lradc"
- for i.MX28 SoC
-- reg: Address and length of the register set for the device
-- interrupts: Should contain the LRADC interrupts
-
-Optional properties:
-- fsl,lradc-touchscreen-wires: Number of wires used to connect the touchscreen
- to LRADC. Valid value is either 4 or 5. If this
- property is not present, then the touchscreen is
- disabled. 5 wires is valid for i.MX28 SoC only.
-- fsl,ave-ctrl: number of samples per direction to calculate an average value.
- Allowed value is 1 ... 32, default is 4
-- fsl,ave-delay: delay between consecutive samples. Allowed value is
- 2 ... 2048. It is used if 'fsl,ave-ctrl' > 1, counts at
- 2 kHz and its default is 2 (= 1 ms)
-- fsl,settling: delay between plate switch to next sample. Allowed value is
- 1 ... 2047. It counts at 2 kHz and its default is
- 10 (= 5 ms)
-
-Example for i.MX23 SoC:
-
- lradc@...50000 {
- compatible = "fsl,imx23-lradc";
- reg = <0x80050000 0x2000>;
- interrupts = <36 37 38 39 40 41 42 43 44>;
- fsl,lradc-touchscreen-wires = <4>;
- fsl,ave-ctrl = <4>;
- fsl,ave-delay = <2>;
- fsl,settling = <10>;
- };
-
-Example for i.MX28 SoC:
-
- lradc@...50000 {
- compatible = "fsl,imx28-lradc";
- reg = <0x80050000 0x2000>;
- interrupts = <10 14 15 16 17 18 19 20 21 22 23 24 25>;
- fsl,lradc-touchscreen-wires = <5>;
- fsl,ave-ctrl = <4>;
- fsl,ave-delay = <2>;
- fsl,settling = <10>;
- };
--
2.34.1
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