Reset Controller Interface

Reset Controller Interface. More...

Data Structures
struct	reset_dt_spec

Macros
#define	RESET_DT_SPEC_GET_BY_IDX(node_id, idx)
	Static initializer for a reset_dt_spec. More...
#define	RESET_DT_SPEC_GET(node_id)    RESET_DT_SPEC_GET_BY_IDX(node_id, 0)
	Equivalent to RESET_DT_SPEC_GET_BY_IDX(node_id, 0). More...
#define	RESET_DT_SPEC_INST_GET_BY_IDX(inst, idx)    RESET_DT_SPEC_GET_BY_IDX(DT_DRV_INST(inst), idx)
	Static initializer for a reset_dt_spec from a DT_DRV_COMPAT instance's Reset Controller property at an index. More...
#define	RESET_DT_SPEC_INST_GET(inst)    RESET_DT_SPEC_INST_GET_BY_IDX(inst, 0)
	Equivalent to RESET_DT_SPEC_INST_GET_BY_IDX(inst, 0). More...

Functions
int	reset_status (const struct device *dev, uint32_t id, uint8_t *status)
	Get the reset status. More...
static int	reset_status_dt (const struct reset_dt_spec *spec, uint8_t *status)
	Get the reset status from a reset_dt_spec. More...
int	reset_line_assert (const struct device *dev, uint32_t id)
	Put the device in reset state. More...
static int	reset_line_assert_dt (const struct reset_dt_spec *spec)
	Assert the reset state from a reset_dt_spec. More...
int	reset_line_deassert (const struct device *dev, uint32_t id)
	Take out the device from reset state. More...
static int	reset_line_deassert_dt (const struct reset_dt_spec *spec)
	Deassert the reset state from a reset_dt_spec. More...
int	reset_line_toggle (const struct device *dev, uint32_t id)
	Reset the device. More...
static int	reset_line_toggle_dt (const struct reset_dt_spec *spec)
	Reset the device from a reset_dt_spec. More...

Detailed Description

Reset Controller Interface.

Macro Definition Documentation

RESET_DT_SPEC_GET

#define RESET_DT_SPEC_GET

(

node_id

)

RESET_DT_SPEC_GET_BY_IDX(node_id, 0)

#include <include/zephyr/drivers/reset.h>

Equivalent to RESET_DT_SPEC_GET_BY_IDX(node_id, 0).

Parameters

node_id

devicetree node identifier

Returns

static initializer for a struct reset_dt_spec for the property

See also

RESET_DT_SPEC_GET_BY_IDX()

RESET_DT_SPEC_GET_BY_IDX

#define RESET_DT_SPEC_GET_BY_IDX	(		node_id,
			idx
	)

#include <include/zephyr/drivers/reset.h>

Value:

        {                                                                       \
                .dev = DEVICE_DT_GET(DT_RESET_CTLR_BY_IDX(node_id, idx)),       \
                .id = DT_RESET_ID_BY_IDX(node_id, idx)                          \
        }

Static initializer for a reset_dt_spec.

This returns a static initializer for a reset_dt_spec structure given a devicetree node identifier, a property specifying a Reset Controller and an index.

Example devicetree fragment:

 n: node {
    resets = <&reset 10>;
 }

Example usage:

 const struct reset_dt_spec spec = RESET_DT_SPEC_GET_BY_IDX(DT_NODELABEL(n), 0);
 // Initializes 'spec' to:
 // {
 //         .dev = DEVICE_DT_GET(DT_NODELABEL(reset)),
 //         .id = 10
 // }

The 'reset' field must still be checked for readiness, e.g. using device_is_ready(). It is an error to use this macro unless the node exists, has the given property, and that property specifies a reset controller reset line id as shown above.

Parameters

node_id	devicetree node identifier
idx	logical index into "resets"

Returns

static initializer for a struct reset_dt_spec for the property

RESET_DT_SPEC_INST_GET

#define RESET_DT_SPEC_INST_GET

(

inst

)

RESET_DT_SPEC_INST_GET_BY_IDX(inst, 0)

#include <include/zephyr/drivers/reset.h>

Equivalent to RESET_DT_SPEC_INST_GET_BY_IDX(inst, 0).

Parameters

inst	DT_DRV_COMPAT instance number

Returns

static initializer for a struct reset_dt_spec for the property

See also

RESET_DT_SPEC_INST_GET_BY_IDX()

RESET_DT_SPEC_INST_GET_BY_IDX

#define RESET_DT_SPEC_INST_GET_BY_IDX	(		inst,
			idx
	)		RESET_DT_SPEC_GET_BY_IDX(DT_DRV_INST(inst), idx)

#include <include/zephyr/drivers/reset.h>

Static initializer for a reset_dt_spec from a DT_DRV_COMPAT instance's Reset Controller property at an index.

Parameters

inst	DT_DRV_COMPAT instance number
idx	logical index into "resets"

Returns

static initializer for a struct reset_dt_spec for the property

See also

RESET_DT_SPEC_GET_BY_IDX()

Function Documentation

reset_line_assert()

int reset_line_assert	(	const struct device *	dev,
		uint32_t	id
	)

#include <include/zephyr/drivers/reset.h>

Put the device in reset state.

This function sets/clears the reset bits of the device, depending on the logic level (active-high/active-low).

Parameters

dev	Reset controller device.
id	Reset line.

Return values

0	On success.
-ENOSYS	If the functionality is not implemented by the driver.
-errno	Other negative errno in case of failure.

reset_line_assert_dt()

static int reset_line_assert_dt ( const struct reset_dt_spec *  spec )

inlinestatic

#include <include/zephyr/drivers/reset.h>

Assert the reset state from a reset_dt_spec.

This is equivalent to:

reset_line_assert(spec->dev, spec->id);

Parameters

spec	Reset controller specification from devicetree

Returns

a value from reset_line_assert()

reset_line_deassert()

int reset_line_deassert	(	const struct device *	dev,
		uint32_t	id
	)

#include <include/zephyr/drivers/reset.h>

Take out the device from reset state.

This function sets/clears the reset bits of the device, depending on the logic level (active-low/active-high).

Parameters

dev	Reset controller device.
id	Reset line.

Return values

0	On success.
-ENOSYS	If the functionality is not implemented by the driver.
-errno	Other negative errno in case of failure.

reset_line_deassert_dt()

static int reset_line_deassert_dt ( const struct reset_dt_spec *  spec )

inlinestatic

#include <include/zephyr/drivers/reset.h>

Deassert the reset state from a reset_dt_spec.

This is equivalent to:

reset_line_deassert(spec->dev, spec->id)

Parameters

spec	Reset controller specification from devicetree

Returns

a value from reset_line_deassert()

reset_line_toggle()

int reset_line_toggle	(	const struct device *	dev,
		uint32_t	id
	)

#include <include/zephyr/drivers/reset.h>

Reset the device.

This function performs reset for a device (assert + deassert).

Parameters

dev	Reset controller device.
id	Reset line.

Return values

0	On success.
-ENOSYS	If the functionality is not implemented by the driver.
-errno	Other negative errno in case of failure.

reset_line_toggle_dt()

static int reset_line_toggle_dt ( const struct reset_dt_spec *  spec )

inlinestatic

#include <include/zephyr/drivers/reset.h>

Reset the device from a reset_dt_spec.

This is equivalent to:

reset_line_toggle(spec->dev, spec->id)

Parameters

spec	Reset controller specification from devicetree

Returns

a value from reset_line_toggle()

reset_status()

int reset_status	(	const struct device *	dev,
		uint32_t	id,
		uint8_t *	status
	)

#include <include/zephyr/drivers/reset.h>

Get the reset status.

This function returns the reset status of the device.

Parameters

dev	Reset controller device.
id	Reset line.
status	Where to write the reset status.

Return values

0	On success.
-ENOSYS	If the functionality is not implemented by the driver.
-errno	Other negative errno in case of failure.

reset_status_dt()

static int reset_status_dt ( const struct reset_dt_spec *  spec, uint8_t *  status  )

inlinestatic

#include <include/zephyr/drivers/reset.h>

Get the reset status from a reset_dt_spec.

This is equivalent to:

reset_status(spec->dev, spec->id, status);

Parameters

spec	Reset controller specification from devicetree
status	Where to write the reset status.

Returns

a value from reset_status()