/*
 * Copyright (c) 2016 Intel Corporation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef __SENSOR_MCP9808_H__
#define __SENSOR_MCP9808_H__

#include <errno.h>

#include <stdint.h>
#include <device.h>
#include <sensor.h>
#include <misc/util.h>

#ifndef CONFIG_SENSOR_DEBUG
#define DBG(...) { ; }
#else
#include <misc/printk.h>
#define DBG printk
#endif /* CONFIG_SENSOR_DEBUG */

#define MCP9808_REG_CONFIG		0x01
#define MCP9808_REG_UPPER_LIMIT		0x02
#define MCP9808_REG_LOWER_LIMIT		0x03
#define MCP9808_REG_CRITICAL		0x04
#define MCP9808_REG_TEMP_AMB		0x05

#define MCP9808_ALERT_INT		BIT(0)
#define MCP9808_ALERT_CNT		BIT(3)
#define MCP9808_INT_CLEAR		BIT(5)

#define MCP9808_SIGN_BIT		BIT(12)
#define MCP9808_TEMP_INT_MASK		0x0ff0
#define MCP9808_TEMP_INT_SHIFT		4
#define MCP9808_TEMP_FRAC_MASK		0x000f

#define MCP9808_TEMP_MAX		0xffc

struct mcp9808_data {
	struct device *i2c_master;
	uint16_t i2c_slave_addr;

	uint16_t reg_val;

#ifdef CONFIG_MCP9808_TRIGGER_OWN_FIBER
	struct nano_sem sem;
#endif

#ifdef CONFIG_MCP9808_TRIGGER_GLOBAL_FIBER
	struct sensor_work work;
#endif

#ifdef CONFIG_MCP9808_TRIGGER
	struct sensor_trigger trig;
	sensor_trigger_handler_t trigger_handler;
#endif
};

int mcp9808_reg_read(struct mcp9808_data *data, uint8_t reg, uint16_t *val);

#ifdef CONFIG_MCP9808_TRIGGER
int mcp9808_attr_set(struct device *dev, enum sensor_channel chan,
		     enum sensor_attribute attr,
		     const struct sensor_value *val);
int mcp9808_trigger_set(struct device *dev,
			const struct sensor_trigger *trig,
			sensor_trigger_handler_t handler);
void mcp9808_setup_interrupt(struct device *dev);
#else
static inline int mcp9808_attr_set(struct device *dev,
				   enum sensor_channel chan,
				   enum sensor_attribute attr,
				   const struct sensor_value *val)
{
	return -ENOTSUP;
}

static inline int mcp9808_trigger_set(struct device *dev,
				      const struct sensor_trigger *trig,
				      sensor_trigger_handler_t handler)
{
	return -ENOTSUP;
}

static void mcp9808_setup_interrupt(struct device *dev)
{
}
#endif /* CONFIG_MCP9808_TRIGGER */

#endif /* __SENSOR_MCP9808_H__ */