linux-kernel - [PATCH v3 1/2] Documentation: dt-bindings: Document bindings for Aspeed ADC

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Message-Id: <20170323062735.7317-1-raltherr@google.com>
Date:   Wed, 22 Mar 2017 23:27:34 -0700
From:   Rick Altherr <raltherr@...gle.com>
To:     openbmc@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Cc:     devicetree@...r.kernel.org, linux-iio@...r.kernel.org,
        Hartmut Knaack <knaack.h@....de>,
        Rob Herring <robh+dt@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Mark Rutland <mark.rutland@....com>,
        Jonathan Cameron <jic23@...nel.org>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>
Subject: [PATCH v3 1/2] Documentation: dt-bindings: Document bindings for Aspeed ADC

Signed-off-by: Rick Altherr <raltherr@...gle.com>
---

Changes in v3:
- Consistently write hex contstants with lowercase letters
- Drop model numbers from description as same IP is used in every generation

Changes in v2:
- Rewritten as an IIO ADC device

 .../devicetree/bindings/iio/adc/aspeed_adc.txt       | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/aspeed_adc.txt

diff --git a/Documentation/devicetree/bindings/iio/adc/aspeed_adc.txt b/Documentation/devicetree/bindings/iio/adc/aspeed_adc.txt
new file mode 100644
index 000000000000..674e133b7cd7
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/aspeed_adc.txt
@@ -0,0 +1,20 @@
+Aspeed ADC
+
+This device is a 10-bit converter for 16 voltage channels.  All inputs are
+single ended.
+
+Required properties:
+- compatible: Should be "aspeed,ast2400-adc" or "aspeed,ast2500-adc"
+- reg: memory window mapping address and length
+- clocks: Input clock used to derive the sample clock. Expected to be the
+          SoC's APB clock.
+- #io-channel-cells: Must be set to <1> to indicate channels are selected
+                     by index.
+
+Example:
+	adc@...e9000 {
+		compatible = "aspeed,ast2400-adc";
+		reg = <0x1e6e9000 0xb0>;
+		clocks = <&clk_apb>;
+		#io-channel-cells = <1>;
+	};
-- 
2.12.1.500.gab5fba24ee-goog