Merge "qcom: wcd934x: add pinctrl driver for wcd934x"

1 files changed, 138 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/pinctrl/qcom,wcd-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/qcom,wcd-pinctrl.txt
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+Qualcomm Technologies, Inc. WCD GPIO block
+
+This binding describes the GPIO block found in the WCD934X series of
+audio codec's from QTI.
+
+- compatible:
+	Usage: required
+	Value type: <string>
+	Definition: must be "qcom,wcd-pinctrl"
+
+- qcom,num-gpios:
+	Usage: required
+	Value type: <u32>
+	Definition: Number of GPIO's supported by the controller
+
+- gpio-controller:
+	Usage: required
+	Value type: <none>
+	Definition: Mark the device node as a GPIO controller
+
+- #gpio-cells:
+	Usage: required
+	Value type: <u32>
+	Definition: Must be 2;
+		    the first cell will be used to define gpio number and the
+		    second denotes the flags for this gpio
+
+Please refer to ../gpio/gpio.txt for a general description of GPIO bindings.
+
+Please refer to pinctrl-bindings.txt in this directory for details of the
+common pinctrl bindings used by client devices, including the meaning of the
+phrase "pin configuration node".
+
+The pin configuration nodes act as a container for an arbitrary number of
+subnodes. Each of these subnodes represents some desired configuration for a
+pin or a list of pins. This configuration can include the
+mux function to select on those pin(s), and various pin configuration
+parameters, as listed below.
+
+
+SUBNODES:
+
+The name of each subnode is not important; all subnodes should be enumerated
+and processed purely based on their content.
+
+Each subnode only affects those parameters that are explicitly listed. In
+other words, a subnode that lists a mux function but no pin configuration
+parameters implies no information about any pin configuration parameters.
+Similarly, a pin subnode that describes a pullup parameter implies no
+information about e.g. the mux function.
+
+The following generic properties as defined in pinctrl-bindings.txt are valid
+to specify in a pin configuration subnode:
+
+- pins:
+	Usage: required
+	Value type: <string-array>
+	Definition: List of gpio pins affected by the properties specified in
+		    this subnode.  Valid pins are:
+		    gpio1-gpio5 for wcd9340
+
+- bias-disable:
+	Usage: optional
+	Value type: <none>
+	Definition: The specified pins should be configured as no pull.
+
+- bias-pull-down:
+	Usage: optional
+	Value type: <none>
+	Definition: The specified pins should be configured as pull down.
+
+- bias-pull-up:
+	Usage: optional
+	Value type: <empty>
+	Definition: The specified pins should be configured as pull up.
+
+- qcom,pull-up-strength:
+	Usage: optional
+	Value type: <u32>
+	Definition: Specifies the strength to use for pull up, if selected.
+
+- bias-high-impedance:
+	Usage: optional
+	Value type: <none>
+	Definition: The specified pins will put in high-Z mode and disabled.
+
+- input-enable:
+	Usage: optional
+	Value type: <none>
+	Definition: The specified pins are put in input mode.
+
+- output-high:
+	Usage: optional
+	Value type: <none>
+	Definition: The specified pins are configured in output mode, driven
+		    high.
+
+- output-low:
+	Usage: optional
+	Value type: <none>
+	Definition: The specified pins are configured in output mode, driven
+		    low.
+
+- qcom,drive-strength:
+	Usage: optional
+	Value type: <u32>
+	Definition: Selects the drive strength for the specified pins.
+
+Example:
+
+	wcd: wcd_pinctrl@5 {
+		compatible = "qcom,wcd-pinctl";
+		qcom,num-gpios = <5>
+		gpio-controller;
+		#gpio-cells = <2>;
+
+		spkr_1_wcd_en_active: spkr_1_wcd_en_active {
+			mux {
+				pins = "gpio2";
+			};
+
+			config {
+				pins = "gpio2";
+				output-high;
+			};
+		};
+
+		spkr_1_wcd_en_sleep: spkr_1_wcd_en_sleep {
+			mux {
+				pins = "gpio2";
+			};
+
+			config {
+				pins = "gpio2";
+				input-enable;
+			};
+		};
+	};