From: Adam Michaelis <adam.michaelis@rockwellcollins.com>
To: linux-iio@vger.kernel.org
Cc: lars@metafoo.de, michael.hennerich@analog.com, jic23@kernel.org,
knaack.h@gmx.de, pmeerw@pmeerw.net, robh+dt@kernel.org,
mark.rutland@arm.com, charles-antoine.couret@essensium.com,
devicetree@vger.kernel.org, brandon.maier@rockwellcollins.com,
clayton.shotwell@rockwellcollins.com,
Adam Michaelis <adam.michaelis@rockwellcollins.com>
Subject: [PATCH v2 2/6] dt-bindings: iio: ad7949: Add adi,reference-select
Date: Thu, 2 May 2019 11:14:28 -0500 [thread overview]
Message-ID: <1556813672-49861-2-git-send-email-adam.michaelis@rockwellcollins.com> (raw)
In-Reply-To: <1556813672-49861-1-git-send-email-adam.michaelis@rockwellcollins.com>
Adding optional parameter to AD7949 to specify the source for the
reference voltage signal. Default value is maintaned with option '6' to
match previous version of driver.
Signed-off-by: Adam Michaelis <adam.michaelis@rockwellcollins.com>
---
V2: Add some defines to reduce use of magic numbers.
---
.../devicetree/bindings/iio/adc/ad7949.txt | 22 ++++++++++++++++++++--
1 file changed, 20 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/iio/adc/ad7949.txt b/Documentation/devicetree/bindings/iio/adc/ad7949.txt
index c7f5057356b1..14ee9a2cb2a5 100644
--- a/Documentation/devicetree/bindings/iio/adc/ad7949.txt
+++ b/Documentation/devicetree/bindings/iio/adc/ad7949.txt
@@ -6,11 +6,29 @@ Required properties:
* "adi,ad7682"
* "adi,ad7689"
- reg: spi chip select number for the device
- - vref-supply: The regulator supply for ADC reference voltage
-Example:
+Optional properties:
+ - adi,reference-select: Select the reference voltage source to use
+ when converting the input voltages. Valid values are:
+ 0: Internal 2.5V reference; temperature sensor enabled
+ 1: Internal 4.096V reference; temperature sensor enabled
+ 2: External reference, temperature sensor enabled, no buffer
+ 3: External reference, temperature sensor enabled, buffer enabled
+ 6: External reference, temperature sensor disabled, no buffer
+ 7: External reference, temperature sensor disabled, buffer enabled
+ - vref-supply: The regulator supply for ADC reference voltage. Required
+ if external reference selected by 'adi,reference-select'.
+
+Examples:
adc@0 {
compatible = "adi,ad7949";
reg = <0>;
+ adi,reference-select = <2>;
vref-supply = <&vdd_supply>;
};
+
+adc@0 {
+ compatible = "adi,ad7949";
+ reg = <0>;
+ adi,reference-select = <0>;
+};
--
1.9.1
next prev parent reply other threads:[~2019-05-02 16:14 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-02 16:14 [PATCH v2 1/6] iio: ad7949: Support internal Vref Adam Michaelis
2019-05-02 16:14 ` Adam Michaelis [this message]
2019-05-02 16:14 ` [PATCH v2 3/6] iio: ad7949: Support configuration read-back Adam Michaelis
[not found] ` <20190505154227.1735b1b2@archlinux>
[not found] ` <CALMrGWV6rtYQShtm7uBQygtdOpPW30mLnKMxb2Jk8pY68B6yyw@mail.gmail.com>
2019-05-11 10:31 ` Jonathan Cameron
2019-05-13 10:04 ` Popa, Stefan Serban
2019-05-13 14:52 ` [External] " Adam Michaelis
2019-05-24 12:02 ` Couret Charles-Antoine
2019-05-02 16:14 ` [PATCH v2 4/6] dt-bindings: iio: ad7949: Add cfg-readback option Adam Michaelis
2019-05-02 16:14 ` [PATCH v2 5/6] iio: ad7949: Fix SPI interfacing for 14-bit messages Adam Michaelis
2019-05-05 15:06 ` Jonathan Cameron
2019-05-02 16:14 ` [PATCH v2 6/6] iio: ad7949: Fix dummy read cycle placement Adam Michaelis
2019-05-05 14:39 ` [PATCH v2 1/6] iio: ad7949: Support internal Vref Jonathan Cameron
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