nxp,s32ze-pinctrl

Vendor: NXP Semiconductors N.V.

Description

NXP S32 pinctrl node for S32Z/E SoCs.

The NXP S32 pin controller is a singleton node responsible for controlling
the pin function selection and pin properties. This node, labeled 'pinctrl' in
the SoC's devicetree, will define pin configurations in pin groups. Each group
within the pin configuration defines the pin configuration for a peripheral,
and each numbered subgroup in the pin group defines all the pins for that
peripheral with the same configuration properties. The 'pinmux' property in
a group selects the pins to be configured, and the remaining properties set
configuration values for those pins.

For example, to configure the pinmux for UART0, modify the 'pinctrl' from your
board or application devicetree overlay as follows:

  /* Include the SoC package header containing the predefined pins definitions */
  #include <nxp/s32/S32Z27-BGA594-pinctrl.h>

  &pinctrl {
    uart0_default: uart0_default {
      group1 {
        pinmux = <PB10_LIN_0_TX>;
        output-enable;
      };
      group2 {
        pinmux = <PB11_LIN_0_RX>;
        input-enable;
      };
    };
  };

The 'uart0_default' node contains the pin configurations for a particular state
of a device. The 'default' state is the active state. Other states for the same
device can be specified in separate child nodes of 'pinctrl'.

In addition to 'pinmux' property, each group can contain other properties such as
'bias-pull-up' or 'slew-rate' that will be applied to all the pins defined in
'pinmux' array. To enable the input buffer use 'input-enable' and to enable the
output buffer use 'output-enable'.

To link the pin configurations with UART0 device, use pinctrl-N property in the
device node, where 'N' is the zero-based state index (0 is the default state).
Following previous example:

  &uart0 {
    pinctrl-0 = <&uart0_default>;
    pinctrl-names = "default";
    status = "okay";
  };

If only the required properties are supplied, the pin configuration register
will be assigned the following reset values:
  - input and output buffers disabled
  - internal pull not enabled
  - open drain disabled
  - slew rate 4 (see description in property below).
  - termination resistor disabled (affect LVDS pads only).
  - current reference control disabled (affect LVDS pads only).
  - Rx current boost disabled  (affect LVDS pads only).

Additionally:
- Safe Mode is always kept as reset value (disabled).
- Receiver Select is always kept as reset value (enables the differential vref based receiver).

Properties

Top level properties

These property descriptions apply to “nxp,s32ze-pinctrl” nodes themselves. This page also describes child node properties in the following sections.

Node specific properties

Properties not inherited from the base binding file.

(None)

Deprecated node specific properties

Deprecated properties not inherited from the base binding file.

(None)

Base properties

Properties inherited from the base binding file, which defines common properties that may be set on many nodes. Not all of these may apply to the “nxp,s32ze-pinctrl” compatible.

Name

Type

Details

status

string

indicates the operational status of a device

Legal values: 'ok', 'okay', 'disabled', 'reserved', 'fail', 'fail-sss'

See Important properties for more information.

compatible

string-array

compatible strings

This property is required.

See Important properties for more information.

reg

array

register space

See Important properties for more information.

reg-names

string-array

name of each register space

interrupts

array

interrupts for device

See Important properties for more information.

interrupts-extended

compound

extended interrupt specifier for device

interrupt-names

string-array

name of each interrupt

interrupt-parent

phandle

phandle to interrupt controller node

label

string

Human readable string describing the device (used as device_get_binding() argument)

See Important properties for more information.

This property is deprecated.

clocks

phandle-array

Clock gate information

clock-names

string-array

name of each clock

#address-cells

int

number of address cells in reg property

#size-cells

int

number of size cells in reg property

dmas

phandle-array

DMA channels specifiers

dma-names

string-array

Provided names of DMA channel specifiers

io-channels

phandle-array

IO channels specifiers

io-channel-names

string-array

Provided names of IO channel specifiers

mboxes

phandle-array

mailbox / IPM channels specifiers

mbox-names

string-array

Provided names of mailbox / IPM channel specifiers

power-domains

phandle-array

Power domain specifiers

power-domain-names

string-array

Provided names of power domain specifiers

#power-domain-cells

int

Number of cells in power-domains property

zephyr,deferred-init

boolean

Do not initialize device automatically on boot. Device should be manually
initialized using device_init().

wakeup-source

boolean

Property to identify that a device can be used as wake up source.

When this property is provided a specific flag is set into the
device that tells the system that the device is capable of
wake up the system.

Wake up capable devices are disabled (interruptions will not wake up
the system) by default but they can be enabled at runtime if necessary.

zephyr,pm-device-runtime-auto

boolean

Automatically configure the device for runtime power management after the
init function runs.

zephyr,disabling-power-states

phandles

List of power states that will disable this device power.

Grandchild node properties

Name

Type

Details

pinmux

array

An array of pins sharing the same group properties. The pins must be
defined using the macros from the SoC package header. These macros
encode all the pin muxing information in a 32-bit value.

This property is required.

slew-rate

int

Slew rate control. Reset value is 4.
- For 3.3 V / 1.8 V FAST pads:
  0: FMAX_3318 = 208 MHz (at 1.8 V), 166 MHz (at 3.3 V)
  4: FMAX_3318 = 166 MHz (at 1.8 V), 150 MHz (at 3.3 V)
  5: FMAX_3318 = 150 MHz (at 1.8 V), 133 MHz (at 3.3 V)
  6: FMAX_3318 = 133 MHz (at 1.8 V), 100 MHz (at 3.3 V)
  7: FMAX_3318 = 100 MHz (at 1.8 V), 83 MHz (at 3.3 V)
- For 1.8 V GPIO pads:
  0: FMAX_18 = 208 MHz
  4: FMAX_18 = 150 MHz
  5: FMAX_18 = 133 MHz
  6: FMAX_18 = 100 MHz
  7: FMAX_18 = 50 MHz
- For 3.3 V GPIO pads:
  0: Reserved
  4: FMAX_33 = 50 MHz
  5: FMAX_33 = 50 MHz
  6: FMAX_33 = 50 MHz
  7: FMAX_33 = 1 MHz

Default value: 4

Legal values: 0, 4, 5, 6, 7

nxp,current-reference-control

boolean

This configuration applies the current reference control to
the associated pin. It is only applicable to LVDS pads and
has no effect on other types of pads

nxp,termination-resistor

boolean

This configuration applies the termination resistor to
the associated pin. It is only applicable to LVDS pads and
has no effect on other types of pads

nxp,rx-current-boost

boolean

RX LVDS Current Boost
Boosts RX IO current. It is only applicable to LVDS pads and
has no effect on other types of pads
0: Current reference is 200 μA; supports data rate up to 320 Mbaud
1: Current reference is 1 mA; supports data rate up to 420 Mbaud

bias-pull-up

boolean

enable pull-up resistor

bias-pull-down

boolean

enable pull-down resistor

drive-open-drain

boolean

drive with open drain (hardware AND)

input-enable

boolean

enable input on pin (e.g. enable an input buffer, no effect on output)

output-enable

boolean

enable output on a pin without actively driving it (e.g. enable an output
buffer)