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/*
* Google LWIS I2C Device Driver
*
* Copyright (c) 2018 Google, LLC
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef LWIS_DEVICE_I2C_H_
#define LWIS_DEVICE_I2C_H_
#include <linux/i2c.h>
#include <linux/pinctrl/consumer.h>
#include "lwis_device.h"
#define MAX_I2C_LOCK_NUM 8
/*
* struct lwis_i2c_device
* "Derived" lwis_device struct, with added i2c related elements.
*/
struct lwis_i2c_device {
struct lwis_device base_dev;
int address;
struct i2c_adapter *adapter;
struct i2c_client *client;
struct pinctrl *state_pinctrl;
bool pinctrl_default_state_only;
/* Group id for I2C lock */
u32 i2c_lock_group_id;
/* Mutex shared by the same group id's I2C devices */
struct mutex *group_i2c_lock;
};
int lwis_i2c_device_deinit(void);
#if IS_ENABLED(CONFIG_INPUT_STMVL53L1)
/*
* Module stmvl53l1 shares one i2c bus with some lwis i2c devices. And use the
* two APIs in stmvl53l1 driver to well handle the enabling and disabling.
*/
extern bool is_shared_i2c_with_stmvl53l1(struct pinctrl *pinctrl);
extern int shared_i2c_set_state(struct device *dev, struct pinctrl *pinctrl, const char *state_str);
#endif
#endif /* LWIS_DEVICE_I2C_H_ */
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