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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>
105 lines
2.9 KiB
C
105 lines
2.9 KiB
C
/*
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* Allwinner Reduced Serial Bus Driver
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*
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* Copyright (c) 2015 Chen-Yu Tsai
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*
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* Author: Chen-Yu Tsai <wens@csie.org>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#ifndef _SUNXI_RSB_H
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#define _SUNXI_RSB_H
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#include <linux/device.h>
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#include <linux/regmap.h>
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#include <linux/types.h>
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struct sunxi_rsb;
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/**
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* struct sunxi_rsb_device - Basic representation of an RSB device
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* @dev: Driver model representation of the device.
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* @ctrl: RSB controller managing the bus hosting this device.
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* @rtaddr: This device's runtime address
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* @hwaddr: This device's hardware address
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*/
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struct sunxi_rsb_device {
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struct device dev;
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struct sunxi_rsb *rsb;
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int irq;
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u8 rtaddr;
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u16 hwaddr;
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};
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static inline struct sunxi_rsb_device *to_sunxi_rsb_device(struct device *d)
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{
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return container_of(d, struct sunxi_rsb_device, dev);
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}
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static inline void *sunxi_rsb_device_get_drvdata(const struct sunxi_rsb_device *rdev)
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{
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return dev_get_drvdata(&rdev->dev);
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}
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static inline void sunxi_rsb_device_set_drvdata(struct sunxi_rsb_device *rdev,
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void *data)
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{
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dev_set_drvdata(&rdev->dev, data);
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}
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/**
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* struct sunxi_rsb_driver - RSB slave device driver
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* @driver: RSB device drivers should initialize name and owner field of
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* this structure.
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* @probe: binds this driver to a RSB device.
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* @remove: unbinds this driver from the RSB device.
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*/
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struct sunxi_rsb_driver {
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struct device_driver driver;
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int (*probe)(struct sunxi_rsb_device *rdev);
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int (*remove)(struct sunxi_rsb_device *rdev);
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};
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static inline struct sunxi_rsb_driver *to_sunxi_rsb_driver(struct device_driver *d)
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{
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return container_of(d, struct sunxi_rsb_driver, driver);
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}
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int sunxi_rsb_driver_register(struct sunxi_rsb_driver *rdrv);
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/**
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* sunxi_rsb_driver_unregister() - unregister an RSB client driver
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* @rdrv: the driver to unregister
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*/
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static inline void sunxi_rsb_driver_unregister(struct sunxi_rsb_driver *rdrv)
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{
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if (rdrv)
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driver_unregister(&rdrv->driver);
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}
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#define module_sunxi_rsb_driver(__sunxi_rsb_driver) \
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module_driver(__sunxi_rsb_driver, sunxi_rsb_driver_register, \
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sunxi_rsb_driver_unregister)
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struct regmap *__devm_regmap_init_sunxi_rsb(struct sunxi_rsb_device *rdev,
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const struct regmap_config *config,
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struct lock_class_key *lock_key,
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const char *lock_name);
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/**
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* devm_regmap_init_sunxi_rsb(): Initialise managed register map
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*
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* @rdev: Device that will be interacted with
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* @config: Configuration for register map
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*
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* The return value will be an ERR_PTR() on error or a valid pointer
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* to a struct regmap. The regmap will be automatically freed by the
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* device management code.
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*/
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#define devm_regmap_init_sunxi_rsb(rdev, config) \
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__regmap_lockdep_wrapper(__devm_regmap_init_sunxi_rsb, #config, \
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rdev, config)
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#endif /* _SUNXI_RSB_H */
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