nxp,s32ze-pinctrl

Vendor: NXP Semiconductors

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).

Additionally, Safe Mode is always disabled (reset value) and configuration that
only applies to LVDS pads, which are not supported, default to reset values:
  - termination resistor disabled
  - receiver single ended
  - current reference control disabled
  - Rx current boost disabled.

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
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.
power-domain	phandle	Power domain the device belongs to. The device will be notified when the power domain it belongs to is either suspended or resumed.

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
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 (no effect on output, such as enabling an input buffer)
output-enable	boolean	enable output on a pin without actively driving it (such as enabling an output buffer)