From: "Mylène Josserand" <mylene.josserand@bootlin.com>
To: peda@axentia.se, jic23@kernel.org, knaack.h@gmx.de,
lars@metafoo.de, pmeerw@pmeerw.net, robh+dt@kernel.org,
mark.rutland@arm.com
Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org,
devicetree@vger.kernel.org, thomas.petazzoni@bootlin.com,
mylene.josserand@bootlin.com
Subject: [PATCH v1 3/3] dt-bindings: iio: afe: Add hwmon example
Date: Tue, 11 Jun 2019 11:56:59 +0200 [thread overview]
Message-ID: <20190611095659.29845-4-mylene.josserand@bootlin.com> (raw)
In-Reply-To: <20190611095659.29845-1-mylene.josserand@bootlin.com>
With the support of CHAN_INFO_PROCESSED in voltage-divider,
it is possible to read the processed values directly from iio's
sysfs entries or by using iio-hwmon. Add an example for this last
use case.
Signed-off-by: Mylène Josserand <mylene.josserand@bootlin.com>
---
.../bindings/iio/afe/voltage-divider.txt | 24 ++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/Documentation/devicetree/bindings/iio/afe/voltage-divider.txt b/Documentation/devicetree/bindings/iio/afe/voltage-divider.txt
index b452a8406107..f7e1c7cb2744 100644
--- a/Documentation/devicetree/bindings/iio/afe/voltage-divider.txt
+++ b/Documentation/devicetree/bindings/iio/afe/voltage-divider.txt
@@ -51,3 +51,27 @@ sysv {
spi-max-frequency = <1000000>;
};
};
+
+It is also possible to retrieve the processed values using hwmon node:
+
+div0: div0 {
+ compatible = "voltage-divider";
+ io-channels = <&adc0 0>; /* Channel 0 of the ADC */
+ output-ohms = <47>; /* R2 */
+ full-ohms = <73>; /* R1 (26) + R2 (47) */
+ #io-channel-cells = <1>;
+};
+
+div1: div1 {
+ compatible = "voltage-divider";
+ io-channels = <&adc0 1>; /* Channel 1 of the ADC */
+ output-ohms = <47>; /* R2 */
+ full-ohms = <115>; /* R1 (68) + R2 (47) */
+ #io-channel-cells = <1>;
+};
+
+iio-hwmon {
+ compatible = "iio-hwmon";
+ io-channels = <&div0 0>, <&div1 0>;
+ io-channel-names = "3v3", "usb";
+};
--
2.11.0
next prev parent reply other threads:[~2019-06-11 9:57 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-11 9:56 [PATCH v1 0/3] iio: afe: rescale: Add INFO_PROCESSED support Mylène Josserand
2019-06-11 9:56 ` [PATCH v1 1/3] iio: afe: rescale: Move scale conversion to new function Mylène Josserand
2019-06-11 11:03 ` Peter Rosin
2019-06-11 9:56 ` [PATCH v1 2/3] iio: afe: rescale: Add support of CHAN_INFO_PROCESSED Mylène Josserand
2019-06-11 9:56 ` Mylène Josserand [this message]
2019-06-11 11:14 ` [PATCH v1 3/3] dt-bindings: iio: afe: Add hwmon example Peter Rosin
2019-06-11 11:02 ` [PATCH v1 0/3] iio: afe: rescale: Add INFO_PROCESSED support Peter Rosin
2019-06-11 11:44 ` Jonathan Cameron
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