ite,it8xxx2-gpio-v2

Vendor: ITE Tech. Inc.

Description

This binding gives a base representation of the ITE gpio

Properties

Top level properties

These property descriptions apply to “ite,it8xxx2-gpio-v2” nodes themselves. This page also describes child node properties in the following sections.

Properties not inherited from the base binding file.

Name

Type

Details

gpio-controller

boolean

Convey's this node is a GPIO controller

This property is required.

#gpio-cells

int

Number of items to expect in a GPIO specifier

This property is required.

ngpios

int

This property indicates the number of in-use slots of available slots
for GPIOs. The typical example is something like this: the hardware
register is 32 bits wide, but only 18 of the bits have a physical
counterpart. The driver is generally written so that all 32 bits can
be used, but the IP block is reused in a lot of designs, some using
all 32 bits, some using 18 and some using 12. In this case, setting
"ngpios = <18>;" informs the driver that only the first 18 GPIOs, at
local offset 0 .. 17, are in use.  For cases in which there might be
holes in the slot range, this value should be the max slot number+1.

Default value: 32

gpio-reserved-ranges

array

If not all the GPIOs at offsets 0...N-1 are usable for ngpios = <N>, then
this property contains an additional set of tuples which specify which GPIOs
are unusable. This property indicates the start and size of the GPIOs
that can't be used.

For example, setting "gpio-reserved-ranges = <3 2>, <10 1>;" means that
GPIO offsets 3, 4, and 10 are not usable, even if ngpios = <18>.

gpio-line-names

string-array

This is an array of strings defining the names of the GPIO lines
going out of the GPIO controller

has-volt-sel

array

Selection of support input voltage 3.3V or 1.8V.

wuc-base

array

WUCs are mapped to the pins of GPIO.
The WUC groups internal and external inputs, and asserts
a wake-up signal to the INTC, allowing the CPU to exit
Doze/Deep Doze/Sleep modes.

wuc-mask

array

keyboard-controller

boolean

When set, this GPIO controller has pins associated with the
keyboard controller. In this case the reg_gpcr property is
overloaded and used to write the keyboard GCTRL register.
This setting will be found in the gpio_ite_configure function
when the judgment of gpio_config->ksb_ctrl is true.
The GPIO control register that will be set for these three
nodes is as follows:
gpioksi:  0xf01d40-0xf01d47
gpioksol: 0xf01d48-0xf01d4f
gpioksoh: 0xf01d50-0xf01d57

Child node properties

Name

Type

Details

gpio-hog

boolean

Conveys this node is a GPIO hog.

This property is required.

gpios

array

This is an array of GPIO specifiers (e.g. pin, flags) to be hogged. The number of array
entries must be an integer multiple of the number of GPIO specifier cells for the parent
GPIO controller.

This property is required.

input

boolean

If this property is set, the GPIO is configured as an input. This property takes
precedence over the output-low and output-high properties.

output-low

boolean

If this property is set, the GPIO is configured as an output set to logical low. This
property takes precedence over the output-high property.

output-high

boolean

If this property is set, the GPIO is configured as an output set to logical high.

line-name

string

Optional GPIO line name.

Specifier cell names

  • gpio cells: pin, flags