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Message-Id: <20181203213223.16986-6-robh@kernel.org>
Date: Mon, 3 Dec 2018 15:31:54 -0600
From: Rob Herring <robh@...nel.org>
To: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Sean Hudson <darknighte@...knighte.com>,
Frank Rowand <frowand.list@...il.com>,
linux-arm-kernel@...ts.infradead.org,
linuxppc-dev@...ts.ozlabs.org, Grant Likely <grant.likely@....com>,
Kumar Gala <kumar.gala@...aro.org>, arm@...nel.org
Subject: [PATCH v2 05/34] dt-bindings: i2c: Convert i2c-gpio binding to json-schema
Convert the i2c-gpio binding to DT schema format using json-schema. This
serves as an example of how to include other schema (i2c-controller.yaml
in this case).
Signed-off-by: Rob Herring <robh@...nel.org>
---
.../devicetree/bindings/i2c/i2c-gpio.txt | 46 ------------
.../devicetree/bindings/i2c/i2c-gpio.yaml | 73 +++++++++++++++++++
2 files changed, 73 insertions(+), 46 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/i2c/i2c-gpio.txt
create mode 100644 Documentation/devicetree/bindings/i2c/i2c-gpio.yaml
diff --git a/Documentation/devicetree/bindings/i2c/i2c-gpio.txt b/Documentation/devicetree/bindings/i2c/i2c-gpio.txt
deleted file mode 100644
index 38a05562d1d2..000000000000
--- a/Documentation/devicetree/bindings/i2c/i2c-gpio.txt
+++ /dev/null
@@ -1,46 +0,0 @@
-Device-Tree bindings for i2c gpio driver
-
-Required properties:
- - compatible = "i2c-gpio";
- - sda-gpios: gpio used for the sda signal, this should be flagged as
- active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)
- from <dt-bindings/gpio/gpio.h> since the signal is by definition
- open drain.
- - scl-gpios: gpio used for the scl signal, this should be flagged as
- active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)
- from <dt-bindings/gpio/gpio.h> since the signal is by definition
- open drain.
-
-Optional properties:
- - i2c-gpio,scl-output-only: scl as output only
- - i2c-gpio,delay-us: delay between GPIO operations (may depend on each platform)
- - i2c-gpio,timeout-ms: timeout to get data
-
-Deprecated properties, do not use in new device tree sources:
- - gpios: sda and scl gpio, alternative for {sda,scl}-gpios
- - i2c-gpio,sda-open-drain: this means that something outside of our
- control has put the GPIO line used for SDA into open drain mode, and
- that something is not the GPIO chip. It is essentially an
- inconsistency flag.
- - i2c-gpio,scl-open-drain: this means that something outside of our
- control has put the GPIO line used for SCL into open drain mode, and
- that something is not the GPIO chip. It is essentially an
- inconsistency flag.
-
-Example nodes:
-
-#include <dt-bindings/gpio/gpio.h>
-
-i2c@0 {
- compatible = "i2c-gpio";
- sda-gpios = <&pioA 23 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
- scl-gpios = <&pioA 24 (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)>;
- i2c-gpio,delay-us = <2>; /* ~100 kHz */
- #address-cells = <1>;
- #size-cells = <0>;
-
- rv3029c2@56 {
- compatible = "rv3029c2";
- reg = <0x56>;
- };
-};
diff --git a/Documentation/devicetree/bindings/i2c/i2c-gpio.yaml b/Documentation/devicetree/bindings/i2c/i2c-gpio.yaml
new file mode 100644
index 000000000000..da6129090a8e
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/i2c-gpio.yaml
@@ -0,0 +1,73 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/i2c-gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Bindings for GPIO bitbanged I2C
+
+maintainers:
+ - Wolfram Sang <wolfram@...-dreams.de>
+
+allOf:
+ - $ref: /schemas/i2c/i2c-controller.yaml#
+
+properties:
+ compatible:
+ items:
+ - const: i2c-gpio
+
+ sda-gpios:
+ description:
+ gpio used for the sda signal, this should be flagged as
+ active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)
+ from <dt-bindings/gpio/gpio.h> since the signal is by definition
+ open drain.
+ maxItems: 1
+
+ scl-gpios:
+ description:
+ gpio used for the scl signal, this should be flagged as
+ active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)
+ from <dt-bindings/gpio/gpio.h> since the signal is by definition
+ open drain.
+ maxItems: 1
+
+ i2c-gpio,scl-output-only:
+ description: scl as output only
+ type: boolean
+
+ i2c-gpio,delay-us:
+ description: delay between GPIO operations (may depend on each platform)
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ i2c-gpio,timeout-ms:
+ description: timeout to get data
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ # Deprecated properties, do not use in new device tree sources:
+ gpios:
+ minItems: 2
+ maxItems: 2
+ description: sda and scl gpio, alternative for {sda,scl}-gpios
+
+ i2c-gpio,sda-open-drain:
+ # Generate a warning if present
+ not: true
+ description: this means that something outside of our control has put
+ the GPIO line used for SDA into open drain mode, and that something is
+ not the GPIO chip. It is essentially an inconsistency flag.
+
+ i2c-gpio,scl-open-drain:
+ # Generate a warning if present
+ not: true
+ description: this means that something outside of our control has put the
+ GPIO line used for SCL into open drain mode, and that something is not
+ the GPIO chip. It is essentially an inconsistency flag.
+
+required:
+ - compatible
+ - sda-gpios
+ - scl-gpios
+
+...
--
2.19.1
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