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authorSascha Hauer <s.hauer@pengutronix.de>2019-04-05 14:51:50 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2019-04-08 10:16:55 +0200
commit1dc748b3b202cadf9b799874d9af8d441ee556bc (patch)
tree58fd3c90a40e2d0128b0c7f36d63d7fc126bb20d /dts/Bindings/mfd/cirrus,lochnagar.txt
parent9688b49cd3bc0b61a019e8e1311236c9975a0777 (diff)
downloadbarebox-1dc748b3b202cadf9b799874d9af8d441ee556bc.tar.gz
dts: update to v5.1-rc1
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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+Cirrus Logic Lochnagar Audio Development Board
+
+Lochnagar is an evaluation and development board for Cirrus Logic
+Smart CODEC and Amp devices. It allows the connection of most Cirrus
+Logic devices on mini-cards, as well as allowing connection of
+various application processor systems to provide a full evaluation
+platform. Audio system topology, clocking and power can all be
+controlled through the Lochnagar, allowing the device under test
+to be used in a variety of possible use cases.
+
+Also see these documents for generic binding information:
+ [1] GPIO : ../gpio/gpio.txt
+
+And these for relevant defines:
+ [2] include/dt-bindings/pinctrl/lochnagar.h
+ [3] include/dt-bindings/clock/lochnagar.h
+
+And these documents for the required sub-node binding details:
+ [4] Clock: ../clock/cirrus,lochnagar.txt
+ [5] Pinctrl: ../pinctrl/cirrus,lochnagar.txt
+ [6] Regulator: ../regulator/cirrus,lochnagar.txt
+
+Required properties:
+
+ - compatible : One of the following strings:
+ "cirrus,lochnagar1"
+ "cirrus,lochnagar2"
+
+ - reg : I2C slave address
+
+ - reset-gpios : Reset line to the Lochnagar, see [1].
+
+Required sub-nodes:
+
+ - lochnagar-clk : Binding for the clocking components, see [4].
+
+ - lochnagar-pinctrl : Binding for the pin control components, see [5].
+
+Optional sub-nodes:
+
+ - Bindings for the regulator components, see [6]. Only available on
+ Lochnagar 2.
+
+Optional properties:
+
+ - present-gpios : Host present line, indicating the presence of a
+ host system, see [1]. This can be omitted if the present line is
+ tied in hardware.
+
+Example:
+
+lochnagar: lochnagar@22 {
+ compatible = "cirrus,lochnagar2";
+ reg = <0x22>;
+
+ reset-gpios = <&gpio0 55 0>;
+ present-gpios = <&gpio0 60 0>;
+
+ lochnagar-clk {
+ compatible = "cirrus,lochnagar2-clk";
+ ...
+ };
+
+ lochnagar-pinctrl {
+ compatible = "cirrus,lochnagar-pinctrl";
+ ...
+ };
+};