--- /dev/null
+Qualcomm PMIC GPIO block
+
+This binding describes the GPIO block(s) found in the 8xxx series of
+PMIC's from Qualcomm.
+
+- compatible:
+ Usage: required
+ Value type: <string>
+ Definition: must be one of:
+ "qcom,pm8018-gpio"
+ "qcom,pm8038-gpio"
+ "qcom,pm8058-gpio"
+ "qcom,pm8916-gpio"
+ "qcom,pm8917-gpio"
+ "qcom,pm8921-gpio"
+ "qcom,pm8941-gpio"
+ "qcom,pma8084-gpio"
+
+- reg:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: Register base of the GPIO block and length.
+
+- interrupts:
+ Usage: required
+ Value type: <prop-encoded-array>
+ Definition: Must contain an array of encoded interrupt specifiers for
+ each available GPIO
+
+- 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 and ../interrupt-controller/interrupts.txt for
+a general description of GPIO and interrupt 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-gpio6 for pm8018
+ gpio1-gpio12 for pm8038
+ gpio1-gpio40 for pm8058
+ gpio1-gpio4 for pm8916
+ gpio1-gpio38 for pm8917
+ gpio1-gpio44 for pm8921
+ gpio1-gpio36 for pm8941
+ gpio1-gpio22 for pma8084
+
+- function:
+ Usage: required
+ Value type: <string>
+ Definition: Specify the alternative function to be configured for the
+ specified pins. Valid values are:
+ "normal",
+ "paired",
+ "func1",
+ "func2",
+ "dtest1",
+ "dtest2",
+ "dtest3",
+ "dtest4"
+
+- 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.
+ Valid values are; as defined in
+ <dt-bindings/pinctrl/qcom,pmic-gpio.h>:
+ 1: 30uA (PMIC_GPIO_PULL_UP_30)
+ 2: 1.5uA (PMIC_GPIO_PULL_UP_1P5)
+ 3: 31.5uA (PMIC_GPIO_PULL_UP_31P5)
+ 4: 1.5uA + 30uA boost (PMIC_GPIO_PULL_UP_1P5_30)
+ If this property is ommited 30uA strength will be used if
+ pull up is 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.
+
+- power-source:
+ Usage: optional
+ Value type: <u32>
+ Definition: Selects the power source for the specified pins. Valid
+ power sources are defined per chip in
+ <dt-bindings/pinctrl/qcom,pmic-gpio.h>
+
+- qcom,drive-strength:
+ Usage: optional
+ Value type: <u32>
+ Definition: Selects the drive strength for the specified pins. Value
+ drive strengths are:
+ 0: no (PMIC_GPIO_STRENGTH_NO)
+ 1: high (PMIC_GPIO_STRENGTH_HIGH) 0.9mA @ 1.8V - 1.9mA @ 2.6V
+ 2: medium (PMIC_GPIO_STRENGTH_MED) 0.6mA @ 1.8V - 1.25mA @ 2.6V
+ 3: low (PMIC_GPIO_STRENGTH_LOW) 0.15mA @ 1.8V - 0.3mA @ 2.6V
+ as defined in <dt-bindings/pinctrl/qcom,pmic-gpio.h>
+
+- drive-push-pull:
+ Usage: optional
+ Value type: <none>
+ Definition: The specified pins are configured in push-pull mode.
+
+- drive-open-drain:
+ Usage: optional
+ Value type: <none>
+ Definition: The specified pins are configured in open-drain mode.
+
+- drive-open-source:
+ Usage: optional
+ Value type: <none>
+ Definition: The specified pins are configured in open-source mode.
+
+Example:
+
+ pm8921_gpio: gpio@150 {
+ compatible = "qcom,pm8921-gpio";
+ reg = <0x150 0x160>;
+ interrupts = <192 1>, <193 1>, <194 1>,
+ <195 1>, <196 1>, <197 1>,
+ <198 1>, <199 1>, <200 1>,
+ <201 1>, <202 1>, <203 1>,
+ <204 1>, <205 1>, <206 1>,
+ <207 1>, <208 1>, <209 1>,
+ <210 1>, <211 1>, <212 1>,
+ <213 1>, <214 1>, <215 1>,
+ <216 1>, <217 1>, <218 1>,
+ <219 1>, <220 1>, <221 1>,
+ <222 1>, <223 1>, <224 1>,
+ <225 1>, <226 1>, <227 1>,
+ <228 1>, <229 1>, <230 1>,
+ <231 1>, <232 1>, <233 1>,
+ <234 1>, <235 1>;
+
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ pm8921_gpio_keys: gpio-keys {
+ volume-keys {
+ pins = "gpio20", "gpio21";
+ function = "normal";
+
+ input-enable;
+ bias-pull-up;
+ drive-push-pull;
+ qcom,drive-strength = <PMIC_GPIO_STRENGTH_NO>;
+ power-source = <PM8921_GPIO_S4>;
+ };
+ };
+ };
Code Review / kvmfornfv.git / blobdiff