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: Definition: must be one of: "qcom,pm8005-gpio" "qcom,pm8018-gpio" "qcom,pm8038-gpio" "qcom,pm8058-gpio" "qcom,pm8916-gpio" "qcom,pm8917-gpio" "qcom,pm8921-gpio" "qcom,pm8941-gpio" "qcom,pm8950-gpio" "qcom,pm8994-gpio" "qcom,pm8998-gpio" "qcom,pma8084-gpio" "qcom,pmi8950-gpio" "qcom,pmi8994-gpio" "qcom,pmi8998-gpio" "qcom,pms405-gpio" "qcom,pm660-gpio" "qcom,pm660l-gpio" "qcom,pm8150-gpio" "qcom,pm8150b-gpio" "qcom,pm8350-gpio" "qcom,pm8350b-gpio" "qcom,pm8350c-gpio" "qcom,pmk8350-gpio" "qcom,pm7325-gpio" "qcom,pmr735a-gpio" "qcom,pmr735b-gpio" "qcom,pm6150-gpio" "qcom,pm6150l-gpio" "qcom,pm8008-gpio" "qcom,pmx55-gpio" And must contain either "qcom,spmi-gpio" or "qcom,ssbi-gpio" if the device is on an spmi bus or an ssbi bus respectively - reg: Usage: required Value type: Definition: Register base of the GPIO block and length. - interrupts: Usage: required Value type: Definition: Must contain an array of encoded interrupt specifiers for each available GPIO - gpio-controller: Usage: required Value type: Definition: Mark the device node as a GPIO controller - #gpio-cells: Usage: required Value type: 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: Definition: List of gpio pins affected by the properties specified in this subnode. Valid pins are: gpio1-gpio4 for pm8005 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-gpio8 for pm8950 (hole on gpio3) gpio1-gpio22 for pm8994 gpio1-gpio26 for pm8998 gpio1-gpio22 for pma8084 gpio1-gpio2 for pmi8950 gpio1-gpio10 for pmi8994 gpio1-gpio12 for pms405 (holes on gpio1, gpio9 and gpio10) gpio1-gpio10 for pm8150 (holes on gpio2, gpio5, gpio7 and gpio8) gpio1-gpio12 for pm8150b (holes on gpio3, gpio4, gpio7) gpio1-gpio12 for pm8150l (hole on gpio7) gpio1-gpio10 for pm8350 gpio1-gpio8 for pm8350b gpio1-gpio9 for pm8350c gpio1-gpio4 for pmk8350 gpio1-gpio10 for pm7325 gpio1-gpio4 for pmr735a gpio1-gpio4 for pmr735b gpio1-gpio10 for pm6150 gpio1-gpio12 for pm6150l gpio1-gpio2 for pm8008 gpio1-gpio11 for pmx55 (holes on gpio3, gpio7, gpio10 and gpio11) - function: Usage: required Value type: Definition: Specify the alternative function to be configured for the specified pins. Valid values are: "normal", "paired", "func1", "func2", "dtest1", "dtest2", "dtest3", "dtest4", And following values are supported by LV/MV GPIO subtypes: "func3", "func4" - bias-disable: Usage: optional Value type: Definition: The specified pins should be configured as no pull. - bias-pull-down: Usage: optional Value type: Definition: The specified pins should be configured as pull down. - bias-pull-up: Usage: optional Value type: Definition: The specified pins should be configured as pull up. - qcom,pull-up-strength: Usage: optional Value type: Definition: Specifies the strength to use for pull up, if selected. Valid values are; as defined in : 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 omitted 30uA strength will be used if pull up is selected - bias-high-impedance: Usage: optional Value type: Definition: The specified pins will put in high-Z mode and disabled. - input-enable: Usage: optional Value type: Definition: The specified pins are put in input mode. - output-high: Usage: optional Value type: Definition: The specified pins are configured in output mode, driven high. - output-low: Usage: optional Value type: Definition: The specified pins are configured in output mode, driven low. - power-source: Usage: optional Value type: Definition: Selects the power source for the specified pins. Valid power sources are defined per chip in - qcom,drive-strength: Usage: optional Value type: 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 - drive-push-pull: Usage: optional Value type: Definition: The specified pins are configured in push-pull mode. - drive-open-drain: Usage: optional Value type: Definition: The specified pins are configured in open-drain mode. - drive-open-source: Usage: optional Value type: Definition: The specified pins are configured in open-source mode. - qcom,analog-pass: Usage: optional Value type: Definition: The specified pins are configured in analog-pass-through mode. - qcom,atest: Usage: optional Value type: Definition: Selects ATEST rail to route to GPIO when it's configured in analog-pass-through mode. Valid values are 1-4 corresponding to ATEST1 to ATEST4. - qcom,dtest-buffer: Usage: optional Value type: Definition: Selects DTEST rail to route to GPIO when it's configured as digital input. Valid values are 1-4 corresponding to DTEST1 to DTEST4. Example: pm8921_gpio: gpio@150 { compatible = "qcom,pm8921-gpio", "qcom,ssbi-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 = ; power-source = ; }; }; };