mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 14:26:40 +07:00
d787dcdb9c
Reduced Serial Bus (RSB) is an Allwinner proprietery interface used to communicate with PMICs and other peripheral ICs. RSB is a two-wire push-pull serial bus that supports 1 master device and up to 15 active slave devices. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Reviewed-by: Mark Brown <broonie@kernel.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Olof Johansson <olof@lixom.net>
106 lines
2.9 KiB
C
106 lines
2.9 KiB
C
/*
|
|
* Allwinner Reduced Serial Bus Driver
|
|
*
|
|
* Copyright (c) 2015 Chen-Yu Tsai
|
|
*
|
|
* Author: Chen-Yu Tsai <wens@csie.org>
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public
|
|
* License version 2. This program is licensed "as is" without any
|
|
* warranty of any kind, whether express or implied.
|
|
*/
|
|
#ifndef _SUNXI_RSB_H
|
|
#define _SUNXI_RSB_H
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/types.h>
|
|
|
|
struct sunxi_rsb;
|
|
|
|
/**
|
|
* struct sunxi_rsb_device - Basic representation of an RSB device
|
|
* @dev: Driver model representation of the device.
|
|
* @ctrl: RSB controller managing the bus hosting this device.
|
|
* @rtaddr: This device's runtime address
|
|
* @hwaddr: This device's hardware address
|
|
*/
|
|
struct sunxi_rsb_device {
|
|
struct device dev;
|
|
struct sunxi_rsb *rsb;
|
|
int irq;
|
|
u8 rtaddr;
|
|
u16 hwaddr;
|
|
};
|
|
|
|
static inline struct sunxi_rsb_device *to_sunxi_rsb_device(struct device *d)
|
|
{
|
|
return container_of(d, struct sunxi_rsb_device, dev);
|
|
}
|
|
|
|
static inline void *sunxi_rsb_device_get_drvdata(const struct sunxi_rsb_device *rdev)
|
|
{
|
|
return dev_get_drvdata(&rdev->dev);
|
|
}
|
|
|
|
static inline void sunxi_rsb_device_set_drvdata(struct sunxi_rsb_device *rdev,
|
|
void *data)
|
|
{
|
|
dev_set_drvdata(&rdev->dev, data);
|
|
}
|
|
|
|
/**
|
|
* struct sunxi_rsb_driver - RSB slave device driver
|
|
* @driver: RSB device drivers should initialize name and owner field of
|
|
* this structure.
|
|
* @probe: binds this driver to a RSB device.
|
|
* @remove: unbinds this driver from the RSB device.
|
|
*/
|
|
struct sunxi_rsb_driver {
|
|
struct device_driver driver;
|
|
int (*probe)(struct sunxi_rsb_device *rdev);
|
|
int (*remove)(struct sunxi_rsb_device *rdev);
|
|
};
|
|
|
|
static inline struct sunxi_rsb_driver *to_sunxi_rsb_driver(struct device_driver *d)
|
|
{
|
|
return container_of(d, struct sunxi_rsb_driver, driver);
|
|
}
|
|
|
|
int sunxi_rsb_driver_register(struct sunxi_rsb_driver *rdrv);
|
|
|
|
/**
|
|
* sunxi_rsb_driver_unregister() - unregister an RSB client driver
|
|
* @rdrv: the driver to unregister
|
|
*/
|
|
static inline void sunxi_rsb_driver_unregister(struct sunxi_rsb_driver *rdrv)
|
|
{
|
|
if (rdrv)
|
|
driver_unregister(&rdrv->driver);
|
|
}
|
|
|
|
#define module_sunxi_rsb_driver(__sunxi_rsb_driver) \
|
|
module_driver(__sunxi_rsb_driver, sunxi_rsb_driver_register, \
|
|
sunxi_rsb_driver_unregister)
|
|
|
|
struct regmap *__devm_regmap_init_sunxi_rsb(struct sunxi_rsb_device *rdev,
|
|
const struct regmap_config *config,
|
|
struct lock_class_key *lock_key,
|
|
const char *lock_name);
|
|
|
|
/**
|
|
* devm_regmap_init_sunxi_rsb(): Initialise managed register map
|
|
*
|
|
* @rdev: Device that will be interacted with
|
|
* @config: Configuration for register map
|
|
*
|
|
* The return value will be an ERR_PTR() on error or a valid pointer
|
|
* to a struct regmap. The regmap will be automatically freed by the
|
|
* device management code.
|
|
*/
|
|
#define devm_regmap_init_sunxi_rsb(rdev, config) \
|
|
__regmap_lockdep_wrapper(__devm_regmap_init_sunxi_rsb, #config, \
|
|
rdev, config)
|
|
|
|
#endif /* _SUNXI_RSB_H */
|