mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 20:40:52 +07:00
eaf91db0ab
Currently the reset core has internal support for counting the number of resets for a device described in DT. Generalize this to devices using lookup resets, and export it for public use. This will be used by generic drivers that need to be sure a device is controlled by a single, dedicated reset line (e.g. vfio-platform). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> [p.zabel@pengutronix.de: fixed a typo in reset_control_get_count comment] Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
436 lines
14 KiB
C
436 lines
14 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_RESET_H_
|
|
#define _LINUX_RESET_H_
|
|
|
|
#include <linux/types.h>
|
|
|
|
struct device;
|
|
struct device_node;
|
|
struct reset_control;
|
|
|
|
#ifdef CONFIG_RESET_CONTROLLER
|
|
|
|
int reset_control_reset(struct reset_control *rstc);
|
|
int reset_control_assert(struct reset_control *rstc);
|
|
int reset_control_deassert(struct reset_control *rstc);
|
|
int reset_control_status(struct reset_control *rstc);
|
|
|
|
struct reset_control *__of_reset_control_get(struct device_node *node,
|
|
const char *id, int index, bool shared,
|
|
bool optional);
|
|
struct reset_control *__reset_control_get(struct device *dev, const char *id,
|
|
int index, bool shared,
|
|
bool optional);
|
|
void reset_control_put(struct reset_control *rstc);
|
|
int __device_reset(struct device *dev, bool optional);
|
|
struct reset_control *__devm_reset_control_get(struct device *dev,
|
|
const char *id, int index, bool shared,
|
|
bool optional);
|
|
|
|
struct reset_control *devm_reset_control_array_get(struct device *dev,
|
|
bool shared, bool optional);
|
|
struct reset_control *of_reset_control_array_get(struct device_node *np,
|
|
bool shared, bool optional);
|
|
|
|
int reset_control_get_count(struct device *dev);
|
|
|
|
#else
|
|
|
|
static inline int reset_control_reset(struct reset_control *rstc)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int reset_control_assert(struct reset_control *rstc)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int reset_control_deassert(struct reset_control *rstc)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int reset_control_status(struct reset_control *rstc)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void reset_control_put(struct reset_control *rstc)
|
|
{
|
|
}
|
|
|
|
static inline int __device_reset(struct device *dev, bool optional)
|
|
{
|
|
return optional ? 0 : -ENOTSUPP;
|
|
}
|
|
|
|
static inline struct reset_control *__of_reset_control_get(
|
|
struct device_node *node,
|
|
const char *id, int index, bool shared,
|
|
bool optional)
|
|
{
|
|
return optional ? NULL : ERR_PTR(-ENOTSUPP);
|
|
}
|
|
|
|
static inline struct reset_control *__reset_control_get(
|
|
struct device *dev, const char *id,
|
|
int index, bool shared, bool optional)
|
|
{
|
|
return optional ? NULL : ERR_PTR(-ENOTSUPP);
|
|
}
|
|
|
|
static inline struct reset_control *__devm_reset_control_get(
|
|
struct device *dev, const char *id,
|
|
int index, bool shared, bool optional)
|
|
{
|
|
return optional ? NULL : ERR_PTR(-ENOTSUPP);
|
|
}
|
|
|
|
static inline struct reset_control *
|
|
devm_reset_control_array_get(struct device *dev, bool shared, bool optional)
|
|
{
|
|
return optional ? NULL : ERR_PTR(-ENOTSUPP);
|
|
}
|
|
|
|
static inline struct reset_control *
|
|
of_reset_control_array_get(struct device_node *np, bool shared, bool optional)
|
|
{
|
|
return optional ? NULL : ERR_PTR(-ENOTSUPP);
|
|
}
|
|
|
|
static inline int reset_control_get_count(struct device *dev)
|
|
{
|
|
return -ENOENT;
|
|
}
|
|
|
|
#endif /* CONFIG_RESET_CONTROLLER */
|
|
|
|
static inline int __must_check device_reset(struct device *dev)
|
|
{
|
|
return __device_reset(dev, false);
|
|
}
|
|
|
|
static inline int device_reset_optional(struct device *dev)
|
|
{
|
|
return __device_reset(dev, true);
|
|
}
|
|
|
|
/**
|
|
* reset_control_get_exclusive - Lookup and obtain an exclusive reference
|
|
* to a reset controller.
|
|
* @dev: device to be reset by the controller
|
|
* @id: reset line name
|
|
*
|
|
* Returns a struct reset_control or IS_ERR() condition containing errno.
|
|
* If this function is called more than once for the same reset_control it will
|
|
* return -EBUSY.
|
|
*
|
|
* See reset_control_get_shared for details on shared references to
|
|
* reset-controls.
|
|
*
|
|
* Use of id names is optional.
|
|
*/
|
|
static inline struct reset_control *
|
|
__must_check reset_control_get_exclusive(struct device *dev, const char *id)
|
|
{
|
|
return __reset_control_get(dev, id, 0, false, false);
|
|
}
|
|
|
|
/**
|
|
* reset_control_get_shared - Lookup and obtain a shared reference to a
|
|
* reset controller.
|
|
* @dev: device to be reset by the controller
|
|
* @id: reset line name
|
|
*
|
|
* Returns a struct reset_control or IS_ERR() condition containing errno.
|
|
* This function is intended for use with reset-controls which are shared
|
|
* between hardware blocks.
|
|
*
|
|
* When a reset-control is shared, the behavior of reset_control_assert /
|
|
* deassert is changed, the reset-core will keep track of a deassert_count
|
|
* and only (re-)assert the reset after reset_control_assert has been called
|
|
* as many times as reset_control_deassert was called. Also see the remark
|
|
* about shared reset-controls in the reset_control_assert docs.
|
|
*
|
|
* Calling reset_control_assert without first calling reset_control_deassert
|
|
* is not allowed on a shared reset control. Calling reset_control_reset is
|
|
* also not allowed on a shared reset control.
|
|
*
|
|
* Use of id names is optional.
|
|
*/
|
|
static inline struct reset_control *reset_control_get_shared(
|
|
struct device *dev, const char *id)
|
|
{
|
|
return __reset_control_get(dev, id, 0, true, false);
|
|
}
|
|
|
|
static inline struct reset_control *reset_control_get_optional_exclusive(
|
|
struct device *dev, const char *id)
|
|
{
|
|
return __reset_control_get(dev, id, 0, false, true);
|
|
}
|
|
|
|
static inline struct reset_control *reset_control_get_optional_shared(
|
|
struct device *dev, const char *id)
|
|
{
|
|
return __reset_control_get(dev, id, 0, true, true);
|
|
}
|
|
|
|
/**
|
|
* of_reset_control_get_exclusive - Lookup and obtain an exclusive reference
|
|
* to a reset controller.
|
|
* @node: device to be reset by the controller
|
|
* @id: reset line name
|
|
*
|
|
* Returns a struct reset_control or IS_ERR() condition containing errno.
|
|
*
|
|
* Use of id names is optional.
|
|
*/
|
|
static inline struct reset_control *of_reset_control_get_exclusive(
|
|
struct device_node *node, const char *id)
|
|
{
|
|
return __of_reset_control_get(node, id, 0, false, false);
|
|
}
|
|
|
|
/**
|
|
* of_reset_control_get_shared - Lookup and obtain a shared reference
|
|
* to a reset controller.
|
|
* @node: device to be reset by the controller
|
|
* @id: reset line name
|
|
*
|
|
* When a reset-control is shared, the behavior of reset_control_assert /
|
|
* deassert is changed, the reset-core will keep track of a deassert_count
|
|
* and only (re-)assert the reset after reset_control_assert has been called
|
|
* as many times as reset_control_deassert was called. Also see the remark
|
|
* about shared reset-controls in the reset_control_assert docs.
|
|
*
|
|
* Calling reset_control_assert without first calling reset_control_deassert
|
|
* is not allowed on a shared reset control. Calling reset_control_reset is
|
|
* also not allowed on a shared reset control.
|
|
* Returns a struct reset_control or IS_ERR() condition containing errno.
|
|
*
|
|
* Use of id names is optional.
|
|
*/
|
|
static inline struct reset_control *of_reset_control_get_shared(
|
|
struct device_node *node, const char *id)
|
|
{
|
|
return __of_reset_control_get(node, id, 0, true, false);
|
|
}
|
|
|
|
/**
|
|
* of_reset_control_get_exclusive_by_index - Lookup and obtain an exclusive
|
|
* reference to a reset controller
|
|
* by index.
|
|
* @node: device to be reset by the controller
|
|
* @index: index of the reset controller
|
|
*
|
|
* This is to be used to perform a list of resets for a device or power domain
|
|
* in whatever order. Returns a struct reset_control or IS_ERR() condition
|
|
* containing errno.
|
|
*/
|
|
static inline struct reset_control *of_reset_control_get_exclusive_by_index(
|
|
struct device_node *node, int index)
|
|
{
|
|
return __of_reset_control_get(node, NULL, index, false, false);
|
|
}
|
|
|
|
/**
|
|
* of_reset_control_get_shared_by_index - Lookup and obtain a shared
|
|
* reference to a reset controller
|
|
* by index.
|
|
* @node: device to be reset by the controller
|
|
* @index: index of the reset controller
|
|
*
|
|
* When a reset-control is shared, the behavior of reset_control_assert /
|
|
* deassert is changed, the reset-core will keep track of a deassert_count
|
|
* and only (re-)assert the reset after reset_control_assert has been called
|
|
* as many times as reset_control_deassert was called. Also see the remark
|
|
* about shared reset-controls in the reset_control_assert docs.
|
|
*
|
|
* Calling reset_control_assert without first calling reset_control_deassert
|
|
* is not allowed on a shared reset control. Calling reset_control_reset is
|
|
* also not allowed on a shared reset control.
|
|
* Returns a struct reset_control or IS_ERR() condition containing errno.
|
|
*
|
|
* This is to be used to perform a list of resets for a device or power domain
|
|
* in whatever order. Returns a struct reset_control or IS_ERR() condition
|
|
* containing errno.
|
|
*/
|
|
static inline struct reset_control *of_reset_control_get_shared_by_index(
|
|
struct device_node *node, int index)
|
|
{
|
|
return __of_reset_control_get(node, NULL, index, true, false);
|
|
}
|
|
|
|
/**
|
|
* devm_reset_control_get_exclusive - resource managed
|
|
* reset_control_get_exclusive()
|
|
* @dev: device to be reset by the controller
|
|
* @id: reset line name
|
|
*
|
|
* Managed reset_control_get_exclusive(). For reset controllers returned
|
|
* from this function, reset_control_put() is called automatically on driver
|
|
* detach.
|
|
*
|
|
* See reset_control_get_exclusive() for more information.
|
|
*/
|
|
static inline struct reset_control *
|
|
__must_check devm_reset_control_get_exclusive(struct device *dev,
|
|
const char *id)
|
|
{
|
|
return __devm_reset_control_get(dev, id, 0, false, false);
|
|
}
|
|
|
|
/**
|
|
* devm_reset_control_get_shared - resource managed reset_control_get_shared()
|
|
* @dev: device to be reset by the controller
|
|
* @id: reset line name
|
|
*
|
|
* Managed reset_control_get_shared(). For reset controllers returned from
|
|
* this function, reset_control_put() is called automatically on driver detach.
|
|
* See reset_control_get_shared() for more information.
|
|
*/
|
|
static inline struct reset_control *devm_reset_control_get_shared(
|
|
struct device *dev, const char *id)
|
|
{
|
|
return __devm_reset_control_get(dev, id, 0, true, false);
|
|
}
|
|
|
|
static inline struct reset_control *devm_reset_control_get_optional_exclusive(
|
|
struct device *dev, const char *id)
|
|
{
|
|
return __devm_reset_control_get(dev, id, 0, false, true);
|
|
}
|
|
|
|
static inline struct reset_control *devm_reset_control_get_optional_shared(
|
|
struct device *dev, const char *id)
|
|
{
|
|
return __devm_reset_control_get(dev, id, 0, true, true);
|
|
}
|
|
|
|
/**
|
|
* devm_reset_control_get_exclusive_by_index - resource managed
|
|
* reset_control_get_exclusive()
|
|
* @dev: device to be reset by the controller
|
|
* @index: index of the reset controller
|
|
*
|
|
* Managed reset_control_get_exclusive(). For reset controllers returned from
|
|
* this function, reset_control_put() is called automatically on driver
|
|
* detach.
|
|
*
|
|
* See reset_control_get_exclusive() for more information.
|
|
*/
|
|
static inline struct reset_control *
|
|
devm_reset_control_get_exclusive_by_index(struct device *dev, int index)
|
|
{
|
|
return __devm_reset_control_get(dev, NULL, index, false, false);
|
|
}
|
|
|
|
/**
|
|
* devm_reset_control_get_shared_by_index - resource managed
|
|
* reset_control_get_shared
|
|
* @dev: device to be reset by the controller
|
|
* @index: index of the reset controller
|
|
*
|
|
* Managed reset_control_get_shared(). For reset controllers returned from
|
|
* this function, reset_control_put() is called automatically on driver detach.
|
|
* See reset_control_get_shared() for more information.
|
|
*/
|
|
static inline struct reset_control *
|
|
devm_reset_control_get_shared_by_index(struct device *dev, int index)
|
|
{
|
|
return __devm_reset_control_get(dev, NULL, index, true, false);
|
|
}
|
|
|
|
/*
|
|
* TEMPORARY calls to use during transition:
|
|
*
|
|
* of_reset_control_get() => of_reset_control_get_exclusive()
|
|
*
|
|
* These inline function calls will be removed once all consumers
|
|
* have been moved over to the new explicit API.
|
|
*/
|
|
static inline struct reset_control *of_reset_control_get(
|
|
struct device_node *node, const char *id)
|
|
{
|
|
return of_reset_control_get_exclusive(node, id);
|
|
}
|
|
|
|
static inline struct reset_control *of_reset_control_get_by_index(
|
|
struct device_node *node, int index)
|
|
{
|
|
return of_reset_control_get_exclusive_by_index(node, index);
|
|
}
|
|
|
|
static inline struct reset_control *devm_reset_control_get(
|
|
struct device *dev, const char *id)
|
|
{
|
|
return devm_reset_control_get_exclusive(dev, id);
|
|
}
|
|
|
|
static inline struct reset_control *devm_reset_control_get_optional(
|
|
struct device *dev, const char *id)
|
|
{
|
|
return devm_reset_control_get_optional_exclusive(dev, id);
|
|
|
|
}
|
|
|
|
static inline struct reset_control *devm_reset_control_get_by_index(
|
|
struct device *dev, int index)
|
|
{
|
|
return devm_reset_control_get_exclusive_by_index(dev, index);
|
|
}
|
|
|
|
/*
|
|
* APIs to manage a list of reset controllers
|
|
*/
|
|
static inline struct reset_control *
|
|
devm_reset_control_array_get_exclusive(struct device *dev)
|
|
{
|
|
return devm_reset_control_array_get(dev, false, false);
|
|
}
|
|
|
|
static inline struct reset_control *
|
|
devm_reset_control_array_get_shared(struct device *dev)
|
|
{
|
|
return devm_reset_control_array_get(dev, true, false);
|
|
}
|
|
|
|
static inline struct reset_control *
|
|
devm_reset_control_array_get_optional_exclusive(struct device *dev)
|
|
{
|
|
return devm_reset_control_array_get(dev, false, true);
|
|
}
|
|
|
|
static inline struct reset_control *
|
|
devm_reset_control_array_get_optional_shared(struct device *dev)
|
|
{
|
|
return devm_reset_control_array_get(dev, true, true);
|
|
}
|
|
|
|
static inline struct reset_control *
|
|
of_reset_control_array_get_exclusive(struct device_node *node)
|
|
{
|
|
return of_reset_control_array_get(node, false, false);
|
|
}
|
|
|
|
static inline struct reset_control *
|
|
of_reset_control_array_get_shared(struct device_node *node)
|
|
{
|
|
return of_reset_control_array_get(node, true, false);
|
|
}
|
|
|
|
static inline struct reset_control *
|
|
of_reset_control_array_get_optional_exclusive(struct device_node *node)
|
|
{
|
|
return of_reset_control_array_get(node, false, true);
|
|
}
|
|
|
|
static inline struct reset_control *
|
|
of_reset_control_array_get_optional_shared(struct device_node *node)
|
|
{
|
|
return of_reset_control_array_get(node, true, true);
|
|
}
|
|
#endif
|