/* SPDX-License-Identifier: GPL-2.0-or-later */


#ifndef _LINUX_I2C_MUX_H
#define _LINUX_I2C_MUX_H

#ifdef __KERNEL__

#include <linux/bitops.h>

struct i2c_mux_core {
	struct i2c_adapter *parent;
	struct device *dev;
	unsigned int mux_locked:1;
	unsigned int arbitrator:1;
	unsigned int gate:1;

	void *priv;

	int (*select)(struct i2c_mux_core *, u32 chan_id);
	int (*deselect)(struct i2c_mux_core *, u32 chan_id);

	int num_adapters;
	int max_adapters;
	struct i2c_adapter *adapter[];
};

struct i2c_mux_core *i2c_mux_alloc(struct i2c_adapter *parent,
				   struct device *dev, int max_adapters,
				   int sizeof_priv, u32 flags,
				   int (*select)(struct i2c_mux_core *, u32),
				   int (*deselect)(struct i2c_mux_core *, u32));


#define I2C_MUX_LOCKED     BIT(0)
#define I2C_MUX_ARBITRATOR BIT(1)
#define I2C_MUX_GATE       BIT(2)

static inline void *i2c_mux_priv(struct i2c_mux_core *muxc)
{
	return muxc->priv;
}

struct i2c_adapter *i2c_root_adapter(struct device *dev);


int i2c_mux_add_adapter(struct i2c_mux_core *muxc,
			u32 force_nr, u32 chan_id,
			unsigned int class);

void i2c_mux_del_adapters(struct i2c_mux_core *muxc);

#endif 

#endif 
