106 lines
3.8 KiB
Plaintext
Executable file
106 lines
3.8 KiB
Plaintext
Executable file
Palmas Pincontrol bindings
|
|
|
|
The pins of Palmas device can be set on different option and provides
|
|
the configuration for Pull UP/DOWN, open drain etc.
|
|
|
|
Required properties:
|
|
- compatible: It must be one of following:
|
|
- "ti,palmas-pinctrl" for Palma series of the pincontrol.
|
|
- "ti,tps65913-pinctrl" for Palma series device TPS65913.
|
|
- "ti,tps80036-pinctrl" for Palma series device TPS80036.
|
|
|
|
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".
|
|
|
|
Palmas's pin configuration nodes act as a container for an arbitrary number of
|
|
subnodes. Each of these subnodes represents some desired configuration for a
|
|
list of pins. This configuration can include the mux function to select on
|
|
those pin(s), and various pin configuration parameters, such as pull-up,
|
|
open drain.
|
|
|
|
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.
|
|
|
|
Optional properties:
|
|
- ti,palmas-enable-dvfs1: Enable DVFS1. Configure pins for DVFS1 mode.
|
|
Selection primary or secondary function associated to I2C2_SCL_SCE,
|
|
I2C2_SDA_SDO pin/pad for DVFS1 interface
|
|
- ti,palmas-enable-dvfs2: Enable DVFS2. Configure pins for DVFS2 mode.
|
|
Selection primary or secondary function associated to GPADC_START
|
|
and SYSEN2 pin/pad for DVFS2 interface
|
|
- ti,palmas-override-powerhold: This is applicable for PMICs for which
|
|
GPIO7 is configured in POWERHOLD mode which has higher priority
|
|
over DEV_ON bit and keeps the PMIC supplies on even after the DEV_ON
|
|
bit is turned off. This property enables driver to over ride the
|
|
POWERHOLD value to GPIO7 so as to turn off the PMIC in power off
|
|
scenarios. So for GPIO7 if ti,palmas-override-powerhold is set
|
|
then the GPIO_7 field should never be muxed to anything else.
|
|
It should be set to POWERHOLD by default and only in case of
|
|
power off scenarios the driver will over ride the mux value.
|
|
|
|
This binding uses the following generic properties as defined in
|
|
pinctrl-bindings.txt:
|
|
|
|
Required: pins
|
|
Options: function, bias-disable, bias-pull-up, bias-pull-down,
|
|
drive-open-drain.
|
|
|
|
Note that many of these properties are only valid for certain specific pins.
|
|
See the Palmas device datasheet for complete details regarding which pins
|
|
support which functionality.
|
|
|
|
Valid values for pin names are:
|
|
gpio0, gpio1, gpio2, gpio3, gpio4, gpio5, gpio6, gpio7, gpio8, gpio9,
|
|
gpio10, gpio11, gpio12, gpio13, gpio14, gpio15, vac, powergood,
|
|
nreswarm, pwrdown, gpadc_start, reset_in, nsleep, enable1, enable2,
|
|
int.
|
|
|
|
Valid value of function names are:
|
|
gpio, led, pwm, regen, sysen, clk32kgaudio, id, vbus_det, chrg_det,
|
|
vac, vacok, powergood, usb_psel, msecure, pwrhold, int, nreswarm,
|
|
simrsto, simrsti, low_vbat, wireless_chrg1, rcm, pwrdown, gpadc_start,
|
|
reset_in, nsleep, enable.
|
|
|
|
There are 4 special functions: opt0, opt1, opt2 and opt3. If any of these
|
|
functions is selected then directly pins register will be written with 0, 1, 2
|
|
or 3 respectively if it is valid for that pins or list of pins.
|
|
|
|
Example:
|
|
palmas: tps65913 {
|
|
....
|
|
pinctrl {
|
|
compatible = "ti,tps65913-pinctrl";
|
|
ti,palmas-enable-dvfs1;
|
|
pinctrl-names = "default";
|
|
pinctrl-0 = <&palmas_pins_state>;
|
|
|
|
palmas_pins_state: pinmux {
|
|
gpio0 {
|
|
pins = "gpio0";
|
|
function = "id";
|
|
bias-pull-up;
|
|
};
|
|
|
|
vac {
|
|
pins = "vac";
|
|
function = "vacok";
|
|
bias-pull-down;
|
|
};
|
|
|
|
gpio5 {
|
|
pins = "gpio5";
|
|
function = "opt0";
|
|
drive-open-drain = <1>;
|
|
};
|
|
};
|
|
};
|
|
....
|
|
};
|