From: Andreas Klinger <ak@it-klinger.de>
To: jic23@kernel.org, knaack.h@gmx.de, lars@metafoo.de,
pmeerw@pmeerw.net, robh+dt@kernel.org, mark.rutland@arm.com,
mchehab@kernel.org, davem@davemloft.net,
gregkh@linuxfoundation.org, akpm@linux-foundation.org,
linus.walleij@linaro.org, rdunlap@infradead.org,
devicetree@vger.kernel.org, linux-iio@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v3 1/3] iio: hx711: add avia,data-ready-delay-ns property in DT
Date: Tue, 3 Jul 2018 14:49:22 +0200 [thread overview]
Message-ID: <20180703124922.GA18022@arbeit> (raw)
add avia,data-ready-delay-ns property for hx711 ADC
this is the delay after rising PD_SCK until DOUT is read and assumed to be
ready
Signed-off-by: Andreas Klinger <ak@it-klinger.de>
---
Documentation/devicetree/bindings/iio/adc/avia-hx711.txt | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt b/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt
index b3629405f568..669d213e2964 100644
--- a/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt
+++ b/Documentation/devicetree/bindings/iio/adc/avia-hx711.txt
@@ -8,11 +8,18 @@ Required properties:
See Documentation/devicetree/bindings/gpio/gpio.txt
- avdd-supply: Definition of the regulator used as analog supply
+Optional properties:
+ - avia,data-ready-delay-ns: additional delay in nanoseconds between
+ rising of PD_SCK until DOUT is ready
+ should be less then maximum PD_SCK high
+ time which is 50000 in the datasheet
+
Example:
weight@0 {
compatible = "avia,hx711";
sck-gpios = <&gpio3 10 GPIO_ACTIVE_HIGH>;
dout-gpios = <&gpio0 7 GPIO_ACTIVE_HIGH>;
avdd-suppy = <&avdd>;
+ avia,data-ready-delay-ns = <1000>;
};
--
2.1.4
reply other threads:[~2018-07-03 12:49 UTC|newest]
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