mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
d22b85a1b9
Expose some of internal functions that are required for implementation of customized regulator couplers. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
98 lines
3.3 KiB
C
98 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* coupler.h -- SoC Regulator support, coupler API.
|
|
*
|
|
* Regulator Coupler Interface.
|
|
*/
|
|
|
|
#ifndef __LINUX_REGULATOR_COUPLER_H_
|
|
#define __LINUX_REGULATOR_COUPLER_H_
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/suspend.h>
|
|
|
|
struct regulator_coupler;
|
|
struct regulator_dev;
|
|
|
|
/**
|
|
* struct regulator_coupler - customized regulator's coupler
|
|
*
|
|
* Regulator's coupler allows to customize coupling algorithm.
|
|
*
|
|
* @list: couplers list entry
|
|
* @attach_regulator: Callback invoked on creation of a coupled regulator,
|
|
* couples are unresolved at this point. The callee should
|
|
* check that it could handle the regulator and return 0 on
|
|
* success, -errno on failure and 1 if given regulator is
|
|
* not suitable for this coupler (case of having multiple
|
|
* regulators in a system). Callback shall be implemented.
|
|
* @detach_regulator: Callback invoked on destruction of a coupled regulator.
|
|
* This callback is optional and could be NULL.
|
|
* @balance_voltage: Callback invoked when voltage of a coupled regulator is
|
|
* changing. Called with all of the coupled rdev's being held
|
|
* under "consumer lock". The callee should perform voltage
|
|
* balancing, changing voltage of the coupled regulators as
|
|
* needed. It's up to the coupler to verify the voltage
|
|
* before changing it in hardware, i.e. coupler should
|
|
* check consumer's min/max and etc. This callback is
|
|
* optional and could be NULL, in which case a generic
|
|
* voltage balancer will be used.
|
|
*/
|
|
struct regulator_coupler {
|
|
struct list_head list;
|
|
|
|
int (*attach_regulator)(struct regulator_coupler *coupler,
|
|
struct regulator_dev *rdev);
|
|
int (*detach_regulator)(struct regulator_coupler *coupler,
|
|
struct regulator_dev *rdev);
|
|
int (*balance_voltage)(struct regulator_coupler *coupler,
|
|
struct regulator_dev *rdev,
|
|
suspend_state_t state);
|
|
};
|
|
|
|
#ifdef CONFIG_REGULATOR
|
|
int regulator_coupler_register(struct regulator_coupler *coupler);
|
|
const char *rdev_get_name(struct regulator_dev *rdev);
|
|
int regulator_check_consumers(struct regulator_dev *rdev,
|
|
int *min_uV, int *max_uV,
|
|
suspend_state_t state);
|
|
int regulator_check_voltage(struct regulator_dev *rdev,
|
|
int *min_uV, int *max_uV);
|
|
int regulator_get_voltage_rdev(struct regulator_dev *rdev);
|
|
int regulator_set_voltage_rdev(struct regulator_dev *rdev,
|
|
int min_uV, int max_uV,
|
|
suspend_state_t state);
|
|
#else
|
|
static inline int regulator_coupler_register(struct regulator_coupler *coupler)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline const char *rdev_get_name(struct regulator_dev *rdev)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline int regulator_check_consumers(struct regulator_dev *rdev,
|
|
int *min_uV, int *max_uV,
|
|
suspend_state_t state)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
static inline int regulator_check_voltage(struct regulator_dev *rdev,
|
|
int *min_uV, int *max_uV)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
static inline int regulator_get_voltage_rdev(struct regulator_dev *rdev)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
static inline int regulator_set_voltage_rdev(struct regulator_dev *rdev,
|
|
int min_uV, int max_uV,
|
|
suspend_state_t state)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
#endif
|
|
|
|
#endif
|