mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-24 21:24:00 +08:00
729de41baf
There are cases where a system will want to read a reset status bit before doing any other toggling. Add a reset_control_status helper function to the reset controller API. Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
55 lines
1.9 KiB
C
55 lines
1.9 KiB
C
#ifndef _LINUX_RESET_CONTROLLER_H_
|
|
#define _LINUX_RESET_CONTROLLER_H_
|
|
|
|
#include <linux/list.h>
|
|
|
|
struct reset_controller_dev;
|
|
|
|
/**
|
|
* struct reset_control_ops
|
|
*
|
|
* @reset: for self-deasserting resets, does all necessary
|
|
* things to reset the device
|
|
* @assert: manually assert the reset line, if supported
|
|
* @deassert: manually deassert the reset line, if supported
|
|
* @status: return the status of the reset line, if supported
|
|
*/
|
|
struct reset_control_ops {
|
|
int (*reset)(struct reset_controller_dev *rcdev, unsigned long id);
|
|
int (*assert)(struct reset_controller_dev *rcdev, unsigned long id);
|
|
int (*deassert)(struct reset_controller_dev *rcdev, unsigned long id);
|
|
int (*status)(struct reset_controller_dev *rcdev, unsigned long id);
|
|
};
|
|
|
|
struct module;
|
|
struct device_node;
|
|
struct of_phandle_args;
|
|
|
|
/**
|
|
* struct reset_controller_dev - reset controller entity that might
|
|
* provide multiple reset controls
|
|
* @ops: a pointer to device specific struct reset_control_ops
|
|
* @owner: kernel module of the reset controller driver
|
|
* @list: internal list of reset controller devices
|
|
* @of_node: corresponding device tree node as phandle target
|
|
* @of_reset_n_cells: number of cells in reset line specifiers
|
|
* @of_xlate: translation function to translate from specifier as found in the
|
|
* device tree to id as given to the reset control ops
|
|
* @nr_resets: number of reset controls in this reset controller device
|
|
*/
|
|
struct reset_controller_dev {
|
|
struct reset_control_ops *ops;
|
|
struct module *owner;
|
|
struct list_head list;
|
|
struct device_node *of_node;
|
|
int of_reset_n_cells;
|
|
int (*of_xlate)(struct reset_controller_dev *rcdev,
|
|
const struct of_phandle_args *reset_spec);
|
|
unsigned int nr_resets;
|
|
};
|
|
|
|
int reset_controller_register(struct reset_controller_dev *rcdev);
|
|
void reset_controller_unregister(struct reset_controller_dev *rcdev);
|
|
|
|
#endif
|