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Message-ID: <1584543037-32095-1-git-send-email-fabrice.gasnier@st.com>
Date: Wed, 18 Mar 2020 15:50:37 +0100
From: Fabrice Gasnier <fabrice.gasnier@...com>
To: <robh+dt@...nel.org>, <jic23@...nel.org>
CC: <alexandre.torgue@...com>, <mark.rutland@....com>,
<mcoquelin.stm32@...il.com>, <lars@...afoo.de>, <knaack.h@....de>,
<pmeerw@...erw.net>, <fabrice.gasnier@...com>,
<olivier.moysan@...com>, <linux-iio@...r.kernel.org>,
<devicetree@...r.kernel.org>,
<linux-stm32@...md-mailman.stormreply.com>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>
Subject: [PATCH] dt-bindings: iio: dac: stm32-dac: convert bindings to json-schema
Convert the STM32 DAC binding to DT schema format using json-schema
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@...com>
---
.../devicetree/bindings/iio/dac/st,stm32-dac.txt | 63 ------------
.../devicetree/bindings/iio/dac/st,stm32-dac.yaml | 110 +++++++++++++++++++++
2 files changed, 110 insertions(+), 63 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/iio/dac/st,stm32-dac.txt
create mode 100644 Documentation/devicetree/bindings/iio/dac/st,stm32-dac.yaml
diff --git a/Documentation/devicetree/bindings/iio/dac/st,stm32-dac.txt b/Documentation/devicetree/bindings/iio/dac/st,stm32-dac.txt
deleted file mode 100644
index bf2925c..00000000
--- a/Documentation/devicetree/bindings/iio/dac/st,stm32-dac.txt
+++ /dev/null
@@ -1,63 +0,0 @@
-STMicroelectronics STM32 DAC
-
-The STM32 DAC is a 12-bit voltage output digital-to-analog converter. The DAC
-may be configured in 8 or 12-bit mode. It has two output channels, each with
-its own converter.
-It has built-in noise and triangle waveform generator and supports external
-triggers for conversions. The DAC's output buffer allows a high drive output
-current.
-
-Contents of a stm32 dac root node:
------------------------------------
-Required properties:
-- compatible: Should be one of:
- "st,stm32f4-dac-core"
- "st,stm32h7-dac-core"
-- reg: Offset and length of the device's register set.
-- clocks: Must contain an entry for pclk (which feeds the peripheral bus
- interface)
-- clock-names: Must be "pclk".
-- vref-supply: Phandle to the vref+ input analog reference supply.
-- #address-cells = <1>;
-- #size-cells = <0>;
-
-Optional properties:
-- resets: Must contain the phandle to the reset controller.
-- A pinctrl state named "default" for each DAC channel may be defined to set
- DAC_OUTx pin in mode of operation for analog output on external pin.
-
-Contents of a stm32 dac child node:
------------------------------------
-DAC core node should contain at least one subnode, representing a
-DAC instance/channel available on the machine.
-
-Required properties:
-- compatible: Must be "st,stm32-dac".
-- reg: Must be either 1 or 2, to define (single) channel in use
-- #io-channel-cells = <1>: See the IIO bindings section "IIO consumers" in
- Documentation/devicetree/bindings/iio/iio-bindings.txt
-
-Example:
- dac: dac@...07400 {
- compatible = "st,stm32h7-dac-core";
- reg = <0x40007400 0x400>;
- clocks = <&clk>;
- clock-names = "pclk";
- vref-supply = <®_vref>;
- pinctrl-names = "default";
- pinctrl-0 = <&dac_out1 &dac_out2>;
- #address-cells = <1>;
- #size-cells = <0>;
-
- dac1: dac@1 {
- compatible = "st,stm32-dac";
- #io-channels-cells = <1>;
- reg = <1>;
- };
-
- dac2: dac@2 {
- compatible = "st,stm32-dac";
- #io-channels-cells = <1>;
- reg = <2>;
- };
- };
diff --git a/Documentation/devicetree/bindings/iio/dac/st,stm32-dac.yaml b/Documentation/devicetree/bindings/iio/dac/st,stm32-dac.yaml
new file mode 100644
index 00000000..2b4a955
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/dac/st,stm32-dac.yaml
@@ -0,0 +1,110 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/bindings/iio/dac/st,stm32-dac.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: STMicroelectronics STM32 DAC bindings
+
+description: |
+ The STM32 DAC is a 12-bit voltage output digital-to-analog converter. The DAC
+ may be configured in 8 or 12-bit mode. It has two output channels, each with
+ its own converter.
+ It has built-in noise and triangle waveform generator and supports external
+ triggers for conversions. The DAC's output buffer allows a high drive output
+ current.
+
+maintainers:
+ - Fabrice Gasnier <fabrice.gasnier@...com>
+
+properties:
+ compatible:
+ enum:
+ - st,stm32f4-dac-core
+ - st,stm32h7-dac-core
+
+ reg:
+ maxItems: 1
+
+ resets:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ clock-names:
+ items:
+ - const: pclk
+
+ vref-supply:
+ description: Phandle to the vref input analog reference voltage.
+
+ '#address-cells':
+ const: 1
+
+ '#size-cells':
+ const: 0
+
+additionalProperties: false
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - clock-names
+ - vref-supply
+ - '#address-cells'
+ - '#size-cells'
+
+patternProperties:
+ "^dac@[1-2]+$":
+ type: object
+ description:
+ A DAC block node should contain at least one subnode, representing an
+ DAC instance/channel available on the machine.
+
+ properties:
+ compatible:
+ const: st,stm32-dac
+
+ reg:
+ description: Must be either 1 or 2, to define (single) channel in use
+ enum: [1, 2]
+
+ '#io-channel-cells':
+ const: 1
+
+ additionalProperties: false
+
+ required:
+ - compatible
+ - reg
+ - '#io-channel-cells'
+
+examples:
+ - |
+ // Example on stm32mp157c
+ #include <dt-bindings/clock/stm32mp1-clks.h>
+ dac: dac@...17000 {
+ compatible = "st,stm32h7-dac-core";
+ reg = <0x40017000 0x400>;
+ clocks = <&rcc DAC12>;
+ clock-names = "pclk";
+ vref-supply = <&vref>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ dac@1 {
+ compatible = "st,stm32-dac";
+ #io-channel-cells = <1>;
+ reg = <1>;
+ };
+
+ dac@2 {
+ compatible = "st,stm32-dac";
+ #io-channel-cells = <1>;
+ reg = <2>;
+ };
+ };
+
+...
--
2.7.4
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