linux-kernel - [PATCH v6 1/5] dt-bindings: iio: magnetometer: ak8975: reword gpios, add interrupts, fix style

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Date:   Mon, 25 May 2020 17:10:35 +0200
From:   Jonathan Albrieux <jonathan.albrieux@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     ~postmarketos/upstreaming@...ts.sr.ht,
        Jonathan Albrieux <jonathan.albrieux@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE BINDINGS), Hartmut Knaack <knaack.h@....de>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-iio@...r.kernel.org (open list:IIO SUBSYSTEM AND DRIVERS),
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Jonathan Cameron <jic23@...nel.org>,
        Rob Herring <robh+dt@...nel.org>
Subject: [PATCH v6 1/5] dt-bindings: iio: magnetometer: ak8975: reword gpios, add interrupts, fix style

Reword gpios documentation, add interrupt documentation and fix styles.
Update example to use interrupts instead of gpios.

Signed-off-by: Jonathan Albrieux <jonathan.albrieux@...il.com>
---
 .../bindings/iio/magnetometer/ak8975.txt      | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/iio/magnetometer/ak8975.txt b/Documentation/devicetree/bindings/iio/magnetometer/ak8975.txt
index aa67ceb0d4e0..0576b9df0bf2 100644
--- a/Documentation/devicetree/bindings/iio/magnetometer/ak8975.txt
+++ b/Documentation/devicetree/bindings/iio/magnetometer/ak8975.txt
@@ -2,21 +2,28 @@
 
 Required properties:
 
-  - compatible : should be "asahi-kasei,ak8975"
-  - reg : the I2C address of the magnetometer
+  - compatible : should be "asahi-kasei,ak8975".
+  - reg : the I2C address of the magnetometer.
 
 Optional properties:
 
-  - gpios : should be device tree identifier of the magnetometer DRDY pin
-  - vdd-supply: an optional regulator that needs to be on to provide VDD
-  - mount-matrix: an optional 3x3 mounting rotation matrix
+  - gpios : AK8975 has a "Data ready" pin (DRDY) which informs that data
+      is ready to be read and is possible to listen on it. If used,
+      this should be active high. Prefer interrupt over this.
+
+  - interrupts : interrupt for DRDY pin. Triggered on rising edge.
+
+  - vdd-supply: an optional regulator that needs to be on to provide VDD.
+
+  - mount-matrix: an optional 3x3 mounting rotation matrix.
 
 Example:
 
 ak8975@c {
         compatible = "asahi-kasei,ak8975";
         reg = <0x0c>;
-        gpios = <&gpj0 7 0>;
+        interrupt-parent = <&gpio6>;
+        interrupts = <15 IRQ_TYPE_EDGE_RISING>;
         vdd-supply = <&ldo_3v3_gnss>;
         mount-matrix = "-0.984807753012208",  /* x0 */
                        "0",                   /* y0 */
-- 
2.17.1