mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-17 03:16:44 +07:00
331758eef8
Add device managed variants of gpiod_get_array() / gpiod_put_array() functions for conveniently obtaining and disposing of an entire array of GPIOs with one function call. Signed-off-by: Rojhalat Ibrahim <imr@rtschenk.de> Reviewed-by: Alexandre Courbot <acourbot@nvidia.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
481 lines
14 KiB
C
481 lines
14 KiB
C
#ifndef __LINUX_GPIO_CONSUMER_H
|
|
#define __LINUX_GPIO_CONSUMER_H
|
|
|
|
#include <linux/bug.h>
|
|
#include <linux/err.h>
|
|
#include <linux/kernel.h>
|
|
|
|
struct device;
|
|
|
|
/**
|
|
* Opaque descriptor for a GPIO. These are obtained using gpiod_get() and are
|
|
* preferable to the old integer-based handles.
|
|
*
|
|
* Contrary to integers, a pointer to a gpio_desc is guaranteed to be valid
|
|
* until the GPIO is released.
|
|
*/
|
|
struct gpio_desc;
|
|
|
|
/**
|
|
* Struct containing an array of descriptors that can be obtained using
|
|
* gpiod_get_array().
|
|
*/
|
|
struct gpio_descs {
|
|
unsigned int ndescs;
|
|
struct gpio_desc *desc[];
|
|
};
|
|
|
|
#define GPIOD_FLAGS_BIT_DIR_SET BIT(0)
|
|
#define GPIOD_FLAGS_BIT_DIR_OUT BIT(1)
|
|
#define GPIOD_FLAGS_BIT_DIR_VAL BIT(2)
|
|
|
|
/**
|
|
* Optional flags that can be passed to one of gpiod_* to configure direction
|
|
* and output value. These values cannot be OR'd.
|
|
*/
|
|
enum gpiod_flags {
|
|
GPIOD_ASIS = 0,
|
|
GPIOD_IN = GPIOD_FLAGS_BIT_DIR_SET,
|
|
GPIOD_OUT_LOW = GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT,
|
|
GPIOD_OUT_HIGH = GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT |
|
|
GPIOD_FLAGS_BIT_DIR_VAL,
|
|
};
|
|
|
|
#ifdef CONFIG_GPIOLIB
|
|
|
|
/* Return the number of GPIOs associated with a device / function */
|
|
int gpiod_count(struct device *dev, const char *con_id);
|
|
|
|
/* Acquire and dispose GPIOs */
|
|
struct gpio_desc *__must_check __gpiod_get(struct device *dev,
|
|
const char *con_id,
|
|
enum gpiod_flags flags);
|
|
struct gpio_desc *__must_check __gpiod_get_index(struct device *dev,
|
|
const char *con_id,
|
|
unsigned int idx,
|
|
enum gpiod_flags flags);
|
|
struct gpio_desc *__must_check __gpiod_get_optional(struct device *dev,
|
|
const char *con_id,
|
|
enum gpiod_flags flags);
|
|
struct gpio_desc *__must_check __gpiod_get_index_optional(struct device *dev,
|
|
const char *con_id,
|
|
unsigned int index,
|
|
enum gpiod_flags flags);
|
|
struct gpio_descs *__must_check gpiod_get_array(struct device *dev,
|
|
const char *con_id,
|
|
enum gpiod_flags flags);
|
|
struct gpio_descs *__must_check gpiod_get_array_optional(struct device *dev,
|
|
const char *con_id,
|
|
enum gpiod_flags flags);
|
|
void gpiod_put(struct gpio_desc *desc);
|
|
void gpiod_put_array(struct gpio_descs *descs);
|
|
|
|
struct gpio_desc *__must_check __devm_gpiod_get(struct device *dev,
|
|
const char *con_id,
|
|
enum gpiod_flags flags);
|
|
struct gpio_desc *__must_check __devm_gpiod_get_index(struct device *dev,
|
|
const char *con_id,
|
|
unsigned int idx,
|
|
enum gpiod_flags flags);
|
|
struct gpio_desc *__must_check __devm_gpiod_get_optional(struct device *dev,
|
|
const char *con_id,
|
|
enum gpiod_flags flags);
|
|
struct gpio_desc *__must_check
|
|
__devm_gpiod_get_index_optional(struct device *dev, const char *con_id,
|
|
unsigned int index, enum gpiod_flags flags);
|
|
struct gpio_descs *__must_check devm_gpiod_get_array(struct device *dev,
|
|
const char *con_id,
|
|
enum gpiod_flags flags);
|
|
struct gpio_descs *__must_check
|
|
devm_gpiod_get_array_optional(struct device *dev, const char *con_id,
|
|
enum gpiod_flags flags);
|
|
void devm_gpiod_put(struct device *dev, struct gpio_desc *desc);
|
|
void devm_gpiod_put_array(struct device *dev, struct gpio_descs *descs);
|
|
|
|
int gpiod_get_direction(struct gpio_desc *desc);
|
|
int gpiod_direction_input(struct gpio_desc *desc);
|
|
int gpiod_direction_output(struct gpio_desc *desc, int value);
|
|
int gpiod_direction_output_raw(struct gpio_desc *desc, int value);
|
|
|
|
/* Value get/set from non-sleeping context */
|
|
int gpiod_get_value(const struct gpio_desc *desc);
|
|
void gpiod_set_value(struct gpio_desc *desc, int value);
|
|
void gpiod_set_array(unsigned int array_size,
|
|
struct gpio_desc **desc_array, int *value_array);
|
|
int gpiod_get_raw_value(const struct gpio_desc *desc);
|
|
void gpiod_set_raw_value(struct gpio_desc *desc, int value);
|
|
void gpiod_set_raw_array(unsigned int array_size,
|
|
struct gpio_desc **desc_array, int *value_array);
|
|
|
|
/* Value get/set from sleeping context */
|
|
int gpiod_get_value_cansleep(const struct gpio_desc *desc);
|
|
void gpiod_set_value_cansleep(struct gpio_desc *desc, int value);
|
|
void gpiod_set_array_cansleep(unsigned int array_size,
|
|
struct gpio_desc **desc_array,
|
|
int *value_array);
|
|
int gpiod_get_raw_value_cansleep(const struct gpio_desc *desc);
|
|
void gpiod_set_raw_value_cansleep(struct gpio_desc *desc, int value);
|
|
void gpiod_set_raw_array_cansleep(unsigned int array_size,
|
|
struct gpio_desc **desc_array,
|
|
int *value_array);
|
|
|
|
int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce);
|
|
|
|
int gpiod_is_active_low(const struct gpio_desc *desc);
|
|
int gpiod_cansleep(const struct gpio_desc *desc);
|
|
|
|
int gpiod_to_irq(const struct gpio_desc *desc);
|
|
|
|
/* Convert between the old gpio_ and new gpiod_ interfaces */
|
|
struct gpio_desc *gpio_to_desc(unsigned gpio);
|
|
int desc_to_gpio(const struct gpio_desc *desc);
|
|
|
|
/* Child properties interface */
|
|
struct fwnode_handle;
|
|
|
|
struct gpio_desc *fwnode_get_named_gpiod(struct fwnode_handle *fwnode,
|
|
const char *propname);
|
|
struct gpio_desc *devm_get_gpiod_from_child(struct device *dev,
|
|
const char *con_id,
|
|
struct fwnode_handle *child);
|
|
#else /* CONFIG_GPIOLIB */
|
|
|
|
static inline int gpiod_count(struct device *dev, const char *con_id)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline struct gpio_desc *__must_check __gpiod_get(struct device *dev,
|
|
const char *con_id,
|
|
enum gpiod_flags flags)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
static inline struct gpio_desc *__must_check
|
|
__gpiod_get_index(struct device *dev,
|
|
const char *con_id,
|
|
unsigned int idx,
|
|
enum gpiod_flags flags)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
|
|
static inline struct gpio_desc *__must_check
|
|
__gpiod_get_optional(struct device *dev, const char *con_id,
|
|
enum gpiod_flags flags)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
|
|
static inline struct gpio_desc *__must_check
|
|
__gpiod_get_index_optional(struct device *dev, const char *con_id,
|
|
unsigned int index, enum gpiod_flags flags)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
|
|
static inline struct gpio_descs *__must_check
|
|
gpiod_get_array(struct device *dev, const char *con_id,
|
|
enum gpiod_flags flags)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
|
|
static inline struct gpio_descs *__must_check
|
|
gpiod_get_array_optional(struct device *dev, const char *con_id,
|
|
enum gpiod_flags flags)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
|
|
static inline void gpiod_put(struct gpio_desc *desc)
|
|
{
|
|
might_sleep();
|
|
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
}
|
|
|
|
static inline void gpiod_put_array(struct gpio_descs *descs)
|
|
{
|
|
might_sleep();
|
|
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
}
|
|
|
|
static inline struct gpio_desc *__must_check
|
|
__devm_gpiod_get(struct device *dev,
|
|
const char *con_id,
|
|
enum gpiod_flags flags)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
static inline
|
|
struct gpio_desc *__must_check
|
|
__devm_gpiod_get_index(struct device *dev,
|
|
const char *con_id,
|
|
unsigned int idx,
|
|
enum gpiod_flags flags)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
|
|
static inline struct gpio_desc *__must_check
|
|
__devm_gpiod_get_optional(struct device *dev, const char *con_id,
|
|
enum gpiod_flags flags)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
|
|
static inline struct gpio_desc *__must_check
|
|
__devm_gpiod_get_index_optional(struct device *dev, const char *con_id,
|
|
unsigned int index, enum gpiod_flags flags)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
|
|
static inline struct gpio_descs *__must_check
|
|
devm_gpiod_get_array(struct device *dev, const char *con_id,
|
|
enum gpiod_flags flags)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
|
|
static inline struct gpio_descs *__must_check
|
|
devm_gpiod_get_array_optional(struct device *dev, const char *con_id,
|
|
enum gpiod_flags flags)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
|
|
static inline void devm_gpiod_put(struct device *dev, struct gpio_desc *desc)
|
|
{
|
|
might_sleep();
|
|
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
}
|
|
|
|
static inline void devm_gpiod_put_array(struct device *dev,
|
|
struct gpio_descs *descs)
|
|
{
|
|
might_sleep();
|
|
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
}
|
|
|
|
|
|
static inline int gpiod_get_direction(const struct gpio_desc *desc)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
return -ENOSYS;
|
|
}
|
|
static inline int gpiod_direction_input(struct gpio_desc *desc)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
return -ENOSYS;
|
|
}
|
|
static inline int gpiod_direction_output(struct gpio_desc *desc, int value)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
return -ENOSYS;
|
|
}
|
|
static inline int gpiod_direction_output_raw(struct gpio_desc *desc, int value)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
return -ENOSYS;
|
|
}
|
|
|
|
|
|
static inline int gpiod_get_value(const struct gpio_desc *desc)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
return 0;
|
|
}
|
|
static inline void gpiod_set_value(struct gpio_desc *desc, int value)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
}
|
|
static inline void gpiod_set_array(unsigned int array_size,
|
|
struct gpio_desc **desc_array,
|
|
int *value_array)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
}
|
|
static inline int gpiod_get_raw_value(const struct gpio_desc *desc)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
return 0;
|
|
}
|
|
static inline void gpiod_set_raw_value(struct gpio_desc *desc, int value)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
}
|
|
static inline void gpiod_set_raw_array(unsigned int array_size,
|
|
struct gpio_desc **desc_array,
|
|
int *value_array)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
}
|
|
|
|
static inline int gpiod_get_value_cansleep(const struct gpio_desc *desc)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
return 0;
|
|
}
|
|
static inline void gpiod_set_value_cansleep(struct gpio_desc *desc, int value)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
}
|
|
static inline void gpiod_set_array_cansleep(unsigned int array_size,
|
|
struct gpio_desc **desc_array,
|
|
int *value_array)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
}
|
|
static inline int gpiod_get_raw_value_cansleep(const struct gpio_desc *desc)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
return 0;
|
|
}
|
|
static inline void gpiod_set_raw_value_cansleep(struct gpio_desc *desc,
|
|
int value)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
}
|
|
static inline void gpiod_set_raw_array_cansleep(unsigned int array_size,
|
|
struct gpio_desc **desc_array,
|
|
int *value_array)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
}
|
|
|
|
static inline int gpiod_set_debounce(struct gpio_desc *desc, unsigned debounce)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int gpiod_is_active_low(const struct gpio_desc *desc)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
return 0;
|
|
}
|
|
static inline int gpiod_cansleep(const struct gpio_desc *desc)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
return 0;
|
|
}
|
|
|
|
static inline int gpiod_to_irq(const struct gpio_desc *desc)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline struct gpio_desc *gpio_to_desc(unsigned gpio)
|
|
{
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
static inline int desc_to_gpio(const struct gpio_desc *desc)
|
|
{
|
|
/* GPIO can never have been requested */
|
|
WARN_ON(1);
|
|
return -EINVAL;
|
|
}
|
|
|
|
#endif /* CONFIG_GPIOLIB */
|
|
|
|
/*
|
|
* Vararg-hacks! This is done to transition the kernel to always pass
|
|
* the options flags argument to the below functions. During a transition
|
|
* phase these vararg macros make both old-and-newstyle code compile,
|
|
* but when all calls to the elder API are removed, these should go away
|
|
* and the __gpiod_get() etc functions above be renamed just gpiod_get()
|
|
* etc.
|
|
*/
|
|
#define __gpiod_get(dev, con_id, flags, ...) __gpiod_get(dev, con_id, flags)
|
|
#define gpiod_get(varargs...) __gpiod_get(varargs, GPIOD_ASIS)
|
|
#define __gpiod_get_index(dev, con_id, index, flags, ...) \
|
|
__gpiod_get_index(dev, con_id, index, flags)
|
|
#define gpiod_get_index(varargs...) __gpiod_get_index(varargs, GPIOD_ASIS)
|
|
#define __gpiod_get_optional(dev, con_id, flags, ...) \
|
|
__gpiod_get_optional(dev, con_id, flags)
|
|
#define gpiod_get_optional(varargs...) __gpiod_get_optional(varargs, GPIOD_ASIS)
|
|
#define __gpiod_get_index_optional(dev, con_id, index, flags, ...) \
|
|
__gpiod_get_index_optional(dev, con_id, index, flags)
|
|
#define gpiod_get_index_optional(varargs...) \
|
|
__gpiod_get_index_optional(varargs, GPIOD_ASIS)
|
|
#define __devm_gpiod_get(dev, con_id, flags, ...) \
|
|
__devm_gpiod_get(dev, con_id, flags)
|
|
#define devm_gpiod_get(varargs...) __devm_gpiod_get(varargs, GPIOD_ASIS)
|
|
#define __devm_gpiod_get_index(dev, con_id, index, flags, ...) \
|
|
__devm_gpiod_get_index(dev, con_id, index, flags)
|
|
#define devm_gpiod_get_index(varargs...) \
|
|
__devm_gpiod_get_index(varargs, GPIOD_ASIS)
|
|
#define __devm_gpiod_get_optional(dev, con_id, flags, ...) \
|
|
__devm_gpiod_get_optional(dev, con_id, flags)
|
|
#define devm_gpiod_get_optional(varargs...) \
|
|
__devm_gpiod_get_optional(varargs, GPIOD_ASIS)
|
|
#define __devm_gpiod_get_index_optional(dev, con_id, index, flags, ...) \
|
|
__devm_gpiod_get_index_optional(dev, con_id, index, flags)
|
|
#define devm_gpiod_get_index_optional(varargs...) \
|
|
__devm_gpiod_get_index_optional(varargs, GPIOD_ASIS)
|
|
|
|
#if IS_ENABLED(CONFIG_GPIOLIB) && IS_ENABLED(CONFIG_GPIO_SYSFS)
|
|
|
|
int gpiod_export(struct gpio_desc *desc, bool direction_may_change);
|
|
int gpiod_export_link(struct device *dev, const char *name,
|
|
struct gpio_desc *desc);
|
|
int gpiod_sysfs_set_active_low(struct gpio_desc *desc, int value);
|
|
void gpiod_unexport(struct gpio_desc *desc);
|
|
|
|
#else /* CONFIG_GPIOLIB && CONFIG_GPIO_SYSFS */
|
|
|
|
static inline int gpiod_export(struct gpio_desc *desc,
|
|
bool direction_may_change)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int gpiod_export_link(struct device *dev, const char *name,
|
|
struct gpio_desc *desc)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline int gpiod_sysfs_set_active_low(struct gpio_desc *desc, int value)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static inline void gpiod_unexport(struct gpio_desc *desc)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_GPIOLIB && CONFIG_GPIO_SYSFS */
|
|
|
|
#endif
|