254 lines
7.2 KiB
Plaintext
254 lines
7.2 KiB
Plaintext
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,pm8005-gpio"
|
|
"qcom,pm8018-gpio"
|
|
"qcom,pm8038-gpio"
|
|
"qcom,pm8058-gpio"
|
|
"qcom,pm8916-gpio"
|
|
"qcom,pm8917-gpio"
|
|
"qcom,pm8921-gpio"
|
|
"qcom,pm8941-gpio"
|
|
"qcom,pm8994-gpio"
|
|
"qcom,pm8998-gpio"
|
|
"qcom,pma8084-gpio"
|
|
"qcom,pmi8994-gpio"
|
|
"qcom,pmi8998-gpio"
|
|
"qcom,pms405-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: <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-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-gpio22 for pm8994
|
|
gpio1-gpio26 for pm8998
|
|
gpio1-gpio22 for pma8084
|
|
gpio1-gpio10 for pmi8994
|
|
gpio1-gpio12 for pms405 (holes on gpio1, gpio9 and gpio10)
|
|
|
|
- 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",
|
|
And following values are supported by LV/MV GPIO subtypes:
|
|
"func3",
|
|
"func4"
|
|
|
|
- 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 omitted 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.
|
|
|
|
- qcom,analog-pass:
|
|
Usage: optional
|
|
Value type: <none>
|
|
Definition: The specified pins are configured in analog-pass-through mode.
|
|
|
|
- qcom,atest:
|
|
Usage: optional
|
|
Value type: <u32>
|
|
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: <u32>
|
|
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 = <PMIC_GPIO_STRENGTH_NO>;
|
|
power-source = <PM8921_GPIO_S4>;
|
|
};
|
|
};
|
|
};
|