openisa,rv32m1-pinctrl

Vendor: open-isa.org

Description

OpenISA RV32M1 pinctrl node. This node will define pin configurations in pin groups,
and has the 'pinctrl' node identifier in the SOC's devicetree. 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 'pins' property in
a group selects the pins to be configured, and the remaining properties set
configuration values for those pins. Here is an example group for UART0 pins:

uart0_default: uart0_default {
  group0 {
    pinmux = <RV32M1_MUX('C', 7, 3)>,
             <RV32M1_MUX('C', 8, 3)>;
    drive-strength = "low";
    slew-rate = "fast";
  };
};

If only the required properties are supplied, the pin configuration register
will be assigned the following values:
PCR_PS=0,
PCR_PE=0,
PCR_ODE=0,
PCR_SRE=<slew-rate selection>,
PCR_PFE=0

Properties

Top level properties

These property descriptions apply to “openisa,rv32m1-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 “openisa,rv32m1-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	Pin mux selections for this group. See the SoC level pinctrl DTSI file in the OpenISA HAL for a defined list of these options This property is required.
slew-rate	string	Pin output slew rate. Sets the SRE field in the PORTx_PCRn register. 0 SRE_0_fast- fast slew rate when pin is configured as output 1 SRE_1_slow- slow slew rate when pin is configured as output This property is required. Legal values: 'fast', 'slow'
openisa,passive-filter	boolean	Enable passive filter on pin. Sets the PFE field in the PORTx_PCRn register.
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)